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1.
Wang, Jingjing.
Microfluidics based Molecular Assays for Point-of-Care
Diagnostics.
Degree: PhD, Biomedical Engineering, 2014, Brown University
URL: https://repository.library.brown.edu/studio/item/bdr:386180/
► Microfluidics based diagnostic systems are believed to have great competency for the ever-demanding healthcare in resource limited settings. These miniaturized devices have promise for detecting…
(more)
▼ Microfluidics based diagnostic systems are believed to
have great competency for the ever-demanding healthcare in resource
limited settings. These miniaturized devices have promise for
detecting biological targets with high quality and low cost. A
compact
point- of-
care device would expand their diagnostic
potential. This dissertation presents some of the scientific
insights in development of microfluidic platforms for separation,
amplification and detection of biomolecules ranging from proteins
to viral RNA in influenza patient samples. The research examined
critical aspects of isolation and separation of biomolecules using
a mobile magnetic bead based platform without any use of external
flow system. New models were constructed based on the kinetics and
thermodynamics aspects of assays. A novel microfluidic SMART
(Simple Method for Amplifying RNA Targets) assay was developed for
the detection of H1 seasonal, H1 pandemic and H3 influenza A vRNA
subtypes from clinical specimens. The sensitivity and selectivity
of the assay was performed using a cohort of 116 patient samples.
The SMART correctly detected influenza virus in 99% of the samples
and accurately provided subtyping information (95.7% concordance to
RT-PCR test result). A new frontier of rapid diagnostics for
infectious diseases is highlighted by the threat of increasing drug
resistance due to mutations in critical genes. Many of these
mutations can be characterized via Single Nucleotide Polymorphisms
(SNP’s). This dissertation also presents a new assay for detecting
K103N drug resistance mutation in HIV-1 through direct enzymatic
ligation of two oligonucleotides on a RNA template, and in a single
reaction mixture. Following this, an original method for the fast
detection, and microfluidic separation and quantification of
ligated product is developed. Nucleic acid sample isolation can be
further integrated in the platform, and we are currently developing
this capability in a microfluidic chip. In conclusion, microfluidic
devices were designed and developed to study fundamental properties
of proteins, RNA and DNA in creating new diagnostic
paradigms.
Advisors/Committee Members: Tripathi, Anubhav (Director), Tang, Jay (Director), Darling, Eric (Reader), Palmore, G. Tayhas (Reader), Opal, Steven (Reader), Cohen, Seth (Reader), Tripathi, Anubhav (Director), Tang, Jay (Director), Darling, Eric (Reader), Palmore, G. Tayhas (Reader), Opal, Steven (Reader), Cohen, Seth (Reader).
Subjects/Keywords: point-of-care
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APA (6th Edition):
Wang, J. (2014). Microfluidics based Molecular Assays for Point-of-Care
Diagnostics. (Doctoral Dissertation). Brown University. Retrieved from https://repository.library.brown.edu/studio/item/bdr:386180/
Chicago Manual of Style (16th Edition):
Wang, Jingjing. “Microfluidics based Molecular Assays for Point-of-Care
Diagnostics.” 2014. Doctoral Dissertation, Brown University. Accessed February 25, 2021.
https://repository.library.brown.edu/studio/item/bdr:386180/.
MLA Handbook (7th Edition):
Wang, Jingjing. “Microfluidics based Molecular Assays for Point-of-Care
Diagnostics.” 2014. Web. 25 Feb 2021.
Vancouver:
Wang J. Microfluidics based Molecular Assays for Point-of-Care
Diagnostics. [Internet] [Doctoral dissertation]. Brown University; 2014. [cited 2021 Feb 25].
Available from: https://repository.library.brown.edu/studio/item/bdr:386180/.
Council of Science Editors:
Wang J. Microfluidics based Molecular Assays for Point-of-Care
Diagnostics. [Doctoral Dissertation]. Brown University; 2014. Available from: https://repository.library.brown.edu/studio/item/bdr:386180/

University of Illinois – Urbana-Champaign
2.
Sun, Fu.
Multiplexed detection of infectious pathogens using on-chip loop-mediated isothermal amplification and a smartphone.
Degree: MS, Electrical & Computer Engr, 2017, University of Illinois – Urbana-Champaign
URL: http://hdl.handle.net/2142/99239
► New tools are needed to enable rapid detection, identification, and reporting of infectious pathogens in a wide variety of point-of-care applications that impact human and…
(more)
▼ New tools are needed to enable rapid detection, identification, and reporting of infectious pathogens in a wide variety of
point-of-
care applications that impact human and animal health. In this work, we report the design, construction, and characterization of a platform for multiplexed analysis of disease-specific DNA sequences that utilizes a smartphone camera as the sensor in conjunction with a handheld instrument that interfaces the phone with a silicon-based microfluidic chip. Utilizing specific nucleic acid sequences for four equine respiratory pathogens as representative examples, we demonstrated the ability of the system to use a single droplet of test sample to perform selective qualitative determination of target sequences with integrated experimental controls in an hour. The system achieves detection limits comparable to those obtained by laboratory-based methods and instruments.
Advisors/Committee Members: Cunningham , Brian T (advisor).
Subjects/Keywords: Detection; Pathogens; Point-of-care
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
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to Zotero / EndNote / Reference
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APA (6th Edition):
Sun, F. (2017). Multiplexed detection of infectious pathogens using on-chip loop-mediated isothermal amplification and a smartphone. (Thesis). University of Illinois – Urbana-Champaign. Retrieved from http://hdl.handle.net/2142/99239
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Sun, Fu. “Multiplexed detection of infectious pathogens using on-chip loop-mediated isothermal amplification and a smartphone.” 2017. Thesis, University of Illinois – Urbana-Champaign. Accessed February 25, 2021.
http://hdl.handle.net/2142/99239.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Sun, Fu. “Multiplexed detection of infectious pathogens using on-chip loop-mediated isothermal amplification and a smartphone.” 2017. Web. 25 Feb 2021.
Vancouver:
Sun F. Multiplexed detection of infectious pathogens using on-chip loop-mediated isothermal amplification and a smartphone. [Internet] [Thesis]. University of Illinois – Urbana-Champaign; 2017. [cited 2021 Feb 25].
Available from: http://hdl.handle.net/2142/99239.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Sun F. Multiplexed detection of infectious pathogens using on-chip loop-mediated isothermal amplification and a smartphone. [Thesis]. University of Illinois – Urbana-Champaign; 2017. Available from: http://hdl.handle.net/2142/99239
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Queens University
3.
Li, Xu Liang.
Modeling of pCO2 Point-of-Care Devices
.
Degree: Chemical Engineering, 2014, Queens University
URL: http://hdl.handle.net/1974/8622
► A dynamic model is developed and presented that predicts the voltage response for a Severinghaus electrode-based point-of-care pCO2 sensor. Eight partial differential equations are derived…
(more)
▼ A dynamic model is developed and presented that predicts the voltage response for a Severinghaus electrode-based point-of-care pCO2 sensor. Eight partial differential equations are derived to describe the diffusion and reaction phenomena in the sensor. The model is able to predict the potential response versus time behaviour from different CO2 concentrations in the calibration fluid and control fluids.
The two most influential and uncertain parameters in the model are determined to be the forward rate constant for benzoquinone consumption at the gold surface ( k_(f_Au ) ), and the partition coefficient for CO2 between the membrane and the electrolyte (κ_(〖CO〗_(2_m ) )). These parameters were adjusted heuristically to obtain a good fit (within 2 mV) between the dynamic voltage response data and the model predictions during a critical 4 second period. The model predictions are sufficient for design sensitivity studies, however an improved fit might be possible using a formal least-squares parameter estimation approach, or if additional parameters were estimated.
Several design parameters are varied to study the influence of the electrolyte concentration and the sensor geometry on the voltage response. The most influential design parameter studied is the amount of water present in the electrolyte during sensor operation. This can be affected by the amount of water evaporated during manufacturing and storage, and by the amount of water present when the sensor “wets up” again during operation. The amount of water picked up by the sensor in turn is affected by design parameters such as component/membrane dimensions and thicknesses. The initial buffer concentration in the electrolyte is the second most influential parameter. The resulting model can be used to perform “what if” analyses in order to understand the impact of design decisions on the sensor performance, and to potentially improve the sensor from performance and manufacturing cost perspectives.
Subjects/Keywords: Modeling
;
Point of Care
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Li, X. L. (2014). Modeling of pCO2 Point-of-Care Devices
. (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/8622
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Li, Xu Liang. “Modeling of pCO2 Point-of-Care Devices
.” 2014. Thesis, Queens University. Accessed February 25, 2021.
http://hdl.handle.net/1974/8622.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Li, Xu Liang. “Modeling of pCO2 Point-of-Care Devices
.” 2014. Web. 25 Feb 2021.
Vancouver:
Li XL. Modeling of pCO2 Point-of-Care Devices
. [Internet] [Thesis]. Queens University; 2014. [cited 2021 Feb 25].
Available from: http://hdl.handle.net/1974/8622.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Li XL. Modeling of pCO2 Point-of-Care Devices
. [Thesis]. Queens University; 2014. Available from: http://hdl.handle.net/1974/8622
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Tulane University
4.
Tulman, David.
Quantitative evaluation and optimization of video-rate structured illumination microscopy (VR-SIM) for clinical applications in point-of-procedure tissue assessment.
Degree: 2018, Tulane University
URL: https://digitallibrary.tulane.edu/islandora/object/tulane:87837
► [email protected]
This dissertation is rooted in clinical pathology research, and the main character is addressing limitations in current pathology evaluation workflows. Diagnostic procedures for cancer…
(more)
▼ [email protected]
This dissertation is rooted in clinical pathology research, and the main character is addressing limitations in current pathology evaluation workflows. Diagnostic procedures for cancer are typically conducted via core needle biopsy procedures; however, tissue sampling limitations often result in a low yield of samples containing cancer – there are no reliable intraoperative methods to determine if the “lesion is in the needle”. If biopsy procedures result in a diagnosis of cancer, surgical removal of the tumor is often the frontline curative therapy for many cancers. Importantly, histologic evaluation following the whole resected organ is necessary to determine the presence of residual cancer, yet current methods do not allow efficient determination of tumor removal completeness intraoperatively. To address limitations of current histopathology methods, what is critically needed is a point-of-procedure fresh tissue evaluation system that facilitates 1) rapid on-site imaging and evaluation, 2) less destruction, and 3) more complete assessment of tumor content in fresh specimens.
A novel microscopy system using video-rate structured illumination (VR-SIM), has been developed with the intent of rapid, point-of-procedure histological screening of intact biopsy and whole surgical specimens. VR-SIM leverages widefield imaging, rapid acting fluorescent stains, and optical sectioning to provide high contrast digital images of tissue with histological relevance. The method is to replicate the standard approach as closely as possible, but replace the physical section with an optically sectioned digital image.
The overall goal of this work is to perform technological and methodological refinements necessary to translate VR-SIM as a clinical tool for histologic evaluation of fresh tissue in diagnostic procedures, biobanking, and tumor margin assessment. This project will lay the groundwork for quantitative evaluation of VR-SIM as a clinical tool – with the goal of leading toward industrial design of a VR-SIM as a medical device for hospital use. Developing a new framework for integration of high throughput microscopy into the clinical and research workflow, as well as developing new methods for quantification and evaluation of clinical effectiveness these tools will be presented and discussed in the context of patient outcomes and economic impact.
1
David Tulman
Advisors/Committee Members: Brown, Jonathon Q. (Thesis advisor), School of Science & Engineering Biomedical Engineering (Degree granting institution).
Subjects/Keywords: digital pathology; microscopy; point-of-care diagnostics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
Tulman, D. (2018). Quantitative evaluation and optimization of video-rate structured illumination microscopy (VR-SIM) for clinical applications in point-of-procedure tissue assessment. (Thesis). Tulane University. Retrieved from https://digitallibrary.tulane.edu/islandora/object/tulane:87837
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Tulman, David. “Quantitative evaluation and optimization of video-rate structured illumination microscopy (VR-SIM) for clinical applications in point-of-procedure tissue assessment.” 2018. Thesis, Tulane University. Accessed February 25, 2021.
https://digitallibrary.tulane.edu/islandora/object/tulane:87837.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Tulman, David. “Quantitative evaluation and optimization of video-rate structured illumination microscopy (VR-SIM) for clinical applications in point-of-procedure tissue assessment.” 2018. Web. 25 Feb 2021.
Vancouver:
Tulman D. Quantitative evaluation and optimization of video-rate structured illumination microscopy (VR-SIM) for clinical applications in point-of-procedure tissue assessment. [Internet] [Thesis]. Tulane University; 2018. [cited 2021 Feb 25].
Available from: https://digitallibrary.tulane.edu/islandora/object/tulane:87837.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Tulman D. Quantitative evaluation and optimization of video-rate structured illumination microscopy (VR-SIM) for clinical applications in point-of-procedure tissue assessment. [Thesis]. Tulane University; 2018. Available from: https://digitallibrary.tulane.edu/islandora/object/tulane:87837
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Cornell University
5.
Gumus, Abdurrahman.
Bioelectronic Systems In Studying Tissue Engineering, Real-Time Biophysical Monitoring Of Birds And Point-Of-Care Diagnostics.
Degree: PhD, Electrical Engineering, 2015, Cornell University
URL: http://hdl.handle.net/1813/39295
► The field of bioelectronics started about 18th century with the frog experiments of Luigi Galvani by moving the detached leg of frog with the application…
(more)
▼ The field of bioelectronics started about 18th century with the frog experiments of Luigi Galvani by moving the detached leg of frog with the application of a small voltage. Today there are variety of bioelectronic devices available in many different areas such as pacemakers, continuous glucose sensors, implantable brain tissue interfaces, that show how far we have gone since the Galvani experiments. This dissertation introduces bioelectronic systems for different research areas such as tissue engineering, biophysical monitoring of birds and
point-of-
care diagnostics. First, we have introduced a device depends on organic bioelectronics, a growing research field that integrates organic electronic materials with biological systems, and used it for tissue engineering purposes. We have developed a planar device that contains a conducting polymer stripe and achieves a continuum of microenvironments for cell growth under the influence of an applied bias. Marked differences are observed in the migration behaviors of bovine aortic endothelial cells (EC) as a function of location along the polymer stripe, and 3-fold variation is achieved in EC migration speed and directional persistence time. A gradient in adsorbed fibronectin indicates that a spatial variation in cell adhesion is at play. We have used our device to modulate the cell adhesion and changed cell density gradients of normal and cancerous cell lines by inducing electrically which can be used as a tool for the study of cell-cell interactions. Next, we have developed a real-time in vivo uric acid biosensor system, Labon-a-Bird, for biophysical monitoring of birds. The metabolism of birds is finely tuned to their activities and environments, and thus research on avian systems can play an important role in understanding organismal responses to environmental changes and ecological investigations. After characterization of the sensor system, we demonstrated the autonomous operation of the system by collecting in vivo extracellular uric acid measurements on a domestic chicken. We then show how the device can be used to monitor, in real time, the effects of short-term flight and rest cycles on the uric acid levels of pigeons. In addition, we demonstrate that our device has the ability to measure uric acid level increase in homing pigeons while they fly freely to back home. Successful application of the sensor in migratory birds could open up a new way of studying birds in flight which would lead to a better understanding of the ecology and biology of avian movements. Finally, we have presented a Cholera-Detect system for
point-of-
care detection of Vibrio Cholerae which is a comma-shaped, gram negative bacterium and the cause of an acute diarrhoeal disease in humans called "Cholera". Even though up to 80% of the cases can be successfully treated with oral rehydration salts, around 100,000 - 120,000 of the cases come to an end as deaths. This indicates that early and rapid detection of the cholera is necessary to prevent spread of disease, increase the efficiency of…
Advisors/Committee Members: Erickson, David (chair), Manohar, Rajit (committee member), Winkler, David Ward (committee member), Baeumner, Antje J (committee member).
Subjects/Keywords: Bioelectronics; Biophysical monitoring; Point-of-care diagnostics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
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APA (6th Edition):
Gumus, A. (2015). Bioelectronic Systems In Studying Tissue Engineering, Real-Time Biophysical Monitoring Of Birds And Point-Of-Care Diagnostics. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/39295
Chicago Manual of Style (16th Edition):
Gumus, Abdurrahman. “Bioelectronic Systems In Studying Tissue Engineering, Real-Time Biophysical Monitoring Of Birds And Point-Of-Care Diagnostics.” 2015. Doctoral Dissertation, Cornell University. Accessed February 25, 2021.
http://hdl.handle.net/1813/39295.
MLA Handbook (7th Edition):
Gumus, Abdurrahman. “Bioelectronic Systems In Studying Tissue Engineering, Real-Time Biophysical Monitoring Of Birds And Point-Of-Care Diagnostics.” 2015. Web. 25 Feb 2021.
Vancouver:
Gumus A. Bioelectronic Systems In Studying Tissue Engineering, Real-Time Biophysical Monitoring Of Birds And Point-Of-Care Diagnostics. [Internet] [Doctoral dissertation]. Cornell University; 2015. [cited 2021 Feb 25].
Available from: http://hdl.handle.net/1813/39295.
Council of Science Editors:
Gumus A. Bioelectronic Systems In Studying Tissue Engineering, Real-Time Biophysical Monitoring Of Birds And Point-Of-Care Diagnostics. [Doctoral Dissertation]. Cornell University; 2015. Available from: http://hdl.handle.net/1813/39295

Vanderbilt University
6.
-6623-3163.
Nanocalorimeter Platform for Point-of-Care Medical Applications.
Degree: PhD, Biomedical Engineering, 2020, Vanderbilt University
URL: http://hdl.handle.net/1803/10116
► Point-of-care (POC) diagnostics is an important field of biomedical research, delivering rapid results in nonlaboratory settings. Advances in microfabrication have given rise to calorimeters with…
(more)
▼ Point-of-
care (POC) diagnostics is an important field of biomedical research, delivering rapid results in nonlaboratory settings. Advances in microfabrication have given rise to calorimeters with smaller reaction volumes, which maximizes the sensitivity and reduces the time constant by reducing the thermal mass of the sample and measurement system. Nanocalorimeters were developed capable of detecting heat in the nanojoule range with sub second resolution. Energy generated in enzyme-catalyzed reactions was used to develop assays for the quantification of target analytes termed thermometric enzyme-linked immunosorbent assays (TELISA). The potential for our device as a POC blood test for metabolic diseases was shown through the quantification of phenylalanine (Phe) in serum, an unmet necessary service in the management of phenylketonuria (PKU). Finite element numerical modeling was used to simulate an enzyme-catalyzed reaction within the microfluidic channel of the capillary calorimeter platform, then calculate a calorimeter signal based on the resulting temperature changes. The comprehensive model calibrated for changing enzyme kinetics and determined label enzyme amounts on the calorimeter platform. By combining the capillary fluidics with magnetic bead capture to deliver the analyte to the reaction volume, the platform was adapted for
point-of-
care use. For the first time, a POC highly sensitive TELISA is possible through delivery of the target analyte by functionalized magnetic beads, fluid handling powered entirely by capillary forces, and intuitive operation by hand pipetting of reagents.
Advisors/Committee Members: Baudenbacher, Franz (advisor).
Subjects/Keywords: Nanocalorimeter; TELISA; Biosensor; Point-of-care
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
-6623-3163. (2020). Nanocalorimeter Platform for Point-of-Care Medical Applications. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/10116
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Chicago Manual of Style (16th Edition):
-6623-3163. “Nanocalorimeter Platform for Point-of-Care Medical Applications.” 2020. Doctoral Dissertation, Vanderbilt University. Accessed February 25, 2021.
http://hdl.handle.net/1803/10116.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
MLA Handbook (7th Edition):
-6623-3163. “Nanocalorimeter Platform for Point-of-Care Medical Applications.” 2020. Web. 25 Feb 2021.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Vancouver:
-6623-3163. Nanocalorimeter Platform for Point-of-Care Medical Applications. [Internet] [Doctoral dissertation]. Vanderbilt University; 2020. [cited 2021 Feb 25].
Available from: http://hdl.handle.net/1803/10116.
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
Council of Science Editors:
-6623-3163. Nanocalorimeter Platform for Point-of-Care Medical Applications. [Doctoral Dissertation]. Vanderbilt University; 2020. Available from: http://hdl.handle.net/1803/10116
Note: this citation may be lacking information needed for this citation format:
Author name may be incomplete
7.
Brannelly, Niamh.
The development of a point of care device for measuring blood ammonia.
Degree: PhD, 2017, University of the West of England, Bristol
URL: https://uwe-repository.worktribe.com/output/900674
;
https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.704121
► Ammonia is produced in the body during the metabolism of amino acids. In the liver, it is converted to urea via the urea cycle and…
(more)
▼ Ammonia is produced in the body during the metabolism of amino acids. In the liver, it is converted to urea via the urea cycle and excreted by the kidneys as urine. Normal levels are between 11 to 50 µM, whereas a blood ammonia level of approximately 100 µM indicates pathology. Elevated blood ammonia is associated with a number of pathological conditions including liver and kidney dysfunction. Conditions such as these can affect brain function and can be fatal. Current blood ammonia analysis requires a laboratory blood test. Few, if any of the techniques used are suitable for point of care (POC) testing. The development of a reliable and simple method for blood ammonia determination is essential for clinical diagnosis and management of patient progress in order to prevent further debilitating illnesses developing, and extending life. This is particularly critical in many disorders such as hyperammonaemia of the newborn, inborn errors of metabolism including urea cycle defects, organic acidaemias, hyperinsulinism/hyperammonaemia, liver disease and other cause of hyperammonaemic encephalopathy. This thesis investigates the development of an electrochemical sensor for the measurement of ammonia in blood. Polyaniline has a known affinity for ammonia which operates on the deprotonation of the polyaniline backbone forming an ammonium ion. In this work, polyaniline nanoparticles were fabricated and inkjet-printed onto silver screen printed electrodes. The sensors were then incorporated into devices containing a gas-permeable membrane, which facilitated the measurement of gaseous ammonia from a liquid sample (blood) using electrochemical impedance spectroscopy. The combination of impedance spectroscopy with a gas-permeable membrane allowed the measurement of gaseous ammonia from solution. The ammonia device developed possessed refinements to enhance its sensitivity and included careful optimisation of other aspects of the measurement. For example, an air purge through the device gas chamber was employed to remove matrix interferences from the sensor and improve the specificity to ammonia. The pH of the sample to be analysed was modified in order to increase the mass of ammonia in solution, thus lowering the limit of detection (LOD) of the device. Finally, assay timings were optimised in order to increase the impedimetric response of ammonia. These optimisations resulted in the effective detection of ammonia in a liquid sample down to the lowest clinically relevant levels found in blood. The devices displayed an impedimetric baseline intra- and inter-variability of 25 and 6.9%, respectively for n = 15 over a period of 160 s. A calculated limit of LOD of 12 µM was achieved for human serum measurements. A coefficient of determination of 0.9984, slope of 0.0046 and an intercept of 1.1534 was obtained in human serum across the linear range of 25 to 200 μM ammonia (n = 3). The device was validated against a commercial spectrophotometric assay which resulted in excellent correlation (0.9699, p < 0.0001) with a slope of 1.4472 and…
Subjects/Keywords: 612.1; ammonia; point of care; polyaniline
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Brannelly, N. (2017). The development of a point of care device for measuring blood ammonia. (Doctoral Dissertation). University of the West of England, Bristol. Retrieved from https://uwe-repository.worktribe.com/output/900674 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.704121
Chicago Manual of Style (16th Edition):
Brannelly, Niamh. “The development of a point of care device for measuring blood ammonia.” 2017. Doctoral Dissertation, University of the West of England, Bristol. Accessed February 25, 2021.
https://uwe-repository.worktribe.com/output/900674 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.704121.
MLA Handbook (7th Edition):
Brannelly, Niamh. “The development of a point of care device for measuring blood ammonia.” 2017. Web. 25 Feb 2021.
Vancouver:
Brannelly N. The development of a point of care device for measuring blood ammonia. [Internet] [Doctoral dissertation]. University of the West of England, Bristol; 2017. [cited 2021 Feb 25].
Available from: https://uwe-repository.worktribe.com/output/900674 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.704121.
Council of Science Editors:
Brannelly N. The development of a point of care device for measuring blood ammonia. [Doctoral Dissertation]. University of the West of England, Bristol; 2017. Available from: https://uwe-repository.worktribe.com/output/900674 ; https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.704121

University of Toronto
8.
De Haan, Kevin David.
Point-of-Care Detection System for Multiplexed Bead-Based Assays.
Degree: 2017, University of Toronto
URL: http://hdl.handle.net/1807/79136
► We demonstrate an optical detection system which can be used to measure multiplexed bead based immunoassays. The assays can detect the presence of multiple analytes…
(more)
▼ We demonstrate an optical detection system which can be used to measure multiplexed bead based immunoassays. The assays can detect the presence of multiple analytes in a small sample using a microfluidic cartridge. The system is characterized in terms of linearity and sensitivity and compared to flow cytometers – the traditional detection method. The system is validated by measuring C-reactive protein, serum amyloid A and αKlotho to demonstrate its ability to perform bead immunoassays. Serum amyloid A and αKlotho are measured simultaneously to prove multiplexing ability. The system is designed to be compact and inexpensive to allow easy conversion of the prototype detection system to one suitable for point-of-care.
M.A.S.
Advisors/Committee Members: Aitchison, Stewart, Electrical and Computer Engineering.
Subjects/Keywords: Bead Immunoassay; Point-of-care; 0544
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
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APA (6th Edition):
De Haan, K. D. (2017). Point-of-Care Detection System for Multiplexed Bead-Based Assays. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/79136
Chicago Manual of Style (16th Edition):
De Haan, Kevin David. “Point-of-Care Detection System for Multiplexed Bead-Based Assays.” 2017. Masters Thesis, University of Toronto. Accessed February 25, 2021.
http://hdl.handle.net/1807/79136.
MLA Handbook (7th Edition):
De Haan, Kevin David. “Point-of-Care Detection System for Multiplexed Bead-Based Assays.” 2017. Web. 25 Feb 2021.
Vancouver:
De Haan KD. Point-of-Care Detection System for Multiplexed Bead-Based Assays. [Internet] [Masters thesis]. University of Toronto; 2017. [cited 2021 Feb 25].
Available from: http://hdl.handle.net/1807/79136.
Council of Science Editors:
De Haan KD. Point-of-Care Detection System for Multiplexed Bead-Based Assays. [Masters Thesis]. University of Toronto; 2017. Available from: http://hdl.handle.net/1807/79136

University of Toronto
9.
Pham, Ngoc Minh.
Blood Filtration for Multiplexed Point-of-care Diagnostic Devices.
Degree: 2012, University of Toronto
URL: http://hdl.handle.net/1807/33674
► In the developing world, there are large populations suffering from infectious diseases, many of whom are located in remote regions. With the rapid growth in…
(more)
▼ In the developing world, there are large populations suffering from infectious diseases, many of whom are located in remote regions. With the rapid growth in microfluidic systems in recent years, complex functions of conventional diagnostic equipment have been miniaturized and integrated into small devices at the size of a credit card (so-called portable Point-of-care (POC) devices).
In this thesis a novel approach to overcoming the challenge of in-field biological sample processing and preparation to produce high quality fluids that can be readily used for downstream testings is described and proof of concept experiments presented. This approach uses hydrodynamic effects and combines nanoporous membrane with microfluidic systems and to filter the cellular component of blood. Experiments presented here demonstrate successful cells filtration from whole blood. Employing hydrodynamic effects is also shown to be an effective and potentially useful technique to isolate cells and plasma within appropriate micro-architectures.
MAST
Advisors/Committee Members: Sinton, David, Mechanical and Industrial Engineering.
Subjects/Keywords: microfluidics, point of care; blood filtration; 0548
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Pham, N. M. (2012). Blood Filtration for Multiplexed Point-of-care Diagnostic Devices. (Masters Thesis). University of Toronto. Retrieved from http://hdl.handle.net/1807/33674
Chicago Manual of Style (16th Edition):
Pham, Ngoc Minh. “Blood Filtration for Multiplexed Point-of-care Diagnostic Devices.” 2012. Masters Thesis, University of Toronto. Accessed February 25, 2021.
http://hdl.handle.net/1807/33674.
MLA Handbook (7th Edition):
Pham, Ngoc Minh. “Blood Filtration for Multiplexed Point-of-care Diagnostic Devices.” 2012. Web. 25 Feb 2021.
Vancouver:
Pham NM. Blood Filtration for Multiplexed Point-of-care Diagnostic Devices. [Internet] [Masters thesis]. University of Toronto; 2012. [cited 2021 Feb 25].
Available from: http://hdl.handle.net/1807/33674.
Council of Science Editors:
Pham NM. Blood Filtration for Multiplexed Point-of-care Diagnostic Devices. [Masters Thesis]. University of Toronto; 2012. Available from: http://hdl.handle.net/1807/33674

University of Toronto
10.
Rackus, Darius George.
Tools for Point-of-Care Digital Microfluidics.
Degree: PhD, 2017, University of Toronto
URL: http://hdl.handle.net/1807/93027
► Digital microfluidics (DMF) is a liquid handling technology for the manipulation of discrete droplets on a generic array of hydrophobic insulated electrodes. In DMF, protocols…
(more)
▼ Digital microfluidics (DMF) is a liquid handling technology for the manipulation of discrete droplets on a generic array of hydrophobic insulated electrodes. In DMF, protocols are generated through software and are independent of the microfluidic architecture. DMF can be used to miniaturize and automate routine assays. Of interest are miniaturized medical diagnostic assays that could be performed in an automated fashion and can take place close to the point of need. This thesis describes the development of several tools for the realization of this description.
The feasibility of performing clinical assays with DMF outside of the laboratory was demonstrated for the first time. DMF immunoassays for anti-measles IgG and anti-rubella IgG were performed in Kakuma, a refugee camp in northwestern Kenya. Custom-built open-source control systems and low-cost inkjet-printed cartridges were used to perform up to four chemiluminescent immunoassays simultaneously. 144 samples were tested and the clinical sensitivities and specificities of the DMF immunoassays were shown to be good (>80%).
Having taken DMF out of the laboratory, new tools and detection methods were developed. First, nanostructured microelectrodes (NMEs) for electrochemical analysis were integrated with a DMF device. This was then applied to an immunoassay for anti-rubella IgG. Performance comparable to chemiluminescent methods was achieved. A second tool developed was a method entitled pre-concentration by liquid intake by paper (P-CLIP). Functionalized magnetic microparticles are captured from large (50-300 ÂľL) volumes of liquid and are resuspended in a much smaller volume (1-2 ÂľL). P-CLIP was used with an immunoassay for Pf lactate dehydrogenase and shown to improve signals up to 30-fold. The last tool for DMF clinical assays was the integration of low-cost commercial electrodes. Established methods for integrating sensing electrodes with DMF are costly and have low fabrication throughput. A plastic-based DMF top plate that can receive commercial biosensors and screen-printed electrodes was demonstrated.
The sum of the innovations described in this thesis suggest that DMF is a viable platform for point-of-care analysis. Advancement to the tools already described will enable DMF to be used for analysis of a wide range of non-invasive samples such as finger-prick blood samples and saliva samples.
2018-12-19 00:00:00
Advisors/Committee Members: Wheeler, Aaron R, Chemistry.
Subjects/Keywords: diagnostics; microfluidics; point-of-care; 0486
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Rackus, D. G. (2017). Tools for Point-of-Care Digital Microfluidics. (Doctoral Dissertation). University of Toronto. Retrieved from http://hdl.handle.net/1807/93027
Chicago Manual of Style (16th Edition):
Rackus, Darius George. “Tools for Point-of-Care Digital Microfluidics.” 2017. Doctoral Dissertation, University of Toronto. Accessed February 25, 2021.
http://hdl.handle.net/1807/93027.
MLA Handbook (7th Edition):
Rackus, Darius George. “Tools for Point-of-Care Digital Microfluidics.” 2017. Web. 25 Feb 2021.
Vancouver:
Rackus DG. Tools for Point-of-Care Digital Microfluidics. [Internet] [Doctoral dissertation]. University of Toronto; 2017. [cited 2021 Feb 25].
Available from: http://hdl.handle.net/1807/93027.
Council of Science Editors:
Rackus DG. Tools for Point-of-Care Digital Microfluidics. [Doctoral Dissertation]. University of Toronto; 2017. Available from: http://hdl.handle.net/1807/93027

Georgia Tech
11.
Mannino, Robert G.
A noninvasive, image-based smartphone app for diagnosing anemia.
Degree: PhD, Biomedical Engineering (Joint GT/Emory Department), 2018, Georgia Tech
URL: http://hdl.handle.net/1853/61131
► Smartphone-based telehealth is steadily transforming the delivery of medical care worldwide, moving diagnosis of disease from the clinic to the home to potentially anywhere in…
(more)
▼ Smartphone-based telehealth is steadily transforming the delivery of medical
care worldwide, moving diagnosis of disease from the clinic to the home to potentially anywhere in the globe. Smartphone images alone have recently been used by physicians to remotely diagnose a myriad of diseases. However, smartphone telehealth approaches have yet to non-invasively replace blood-based testing, which remains a major cornerstone of disease diagnosis in modern medicine. While the addition of specialized smartphone attachments and supplemental calibration tools may enable
point-of-
care diagnosis and analysis of tissue and bodily fluid samples, the additional burden of blood and/or tissue sample collections combined with the additional cost and inconvenience associated with this equipment, prevents worldwide use of these potentially disruptive approaches. Therefore, a smartphone-based system, requiring nothing other than the smartphones native technology and capable of non-invasively replacing blood-based diagnostics, would transform the very nature of telehealth and the delivery of healthcare worldwide. Towards that end, I specifically focused on anemia, a potentially life-threatening disorder characterized by low blood hemoglobin (Hgb) levels that affects approximately 2 billion people worldwide. Despite the high prevalence of anemia, all existing diagnostic approaches to measure Hgb require specialized equipment and represent tradeoffs between invasiveness, accuracy, infrastructure needs, and expense. Aside from being cost-prohibitive, the necessary invasive blood sampling to measure Hgb levels causes discomfort and trauma in younger pediatric patients. By examining clinical pallor, a common symptom of anemia, I developed a methodology that quantitatively analyzes patient-sourced photos using smartphone-based algorithms to enable a noninvasive, accurate, and accessible anemia diagnostic. Here, a patient simply takes a picture of their fingernail beds using their smartphone, and the image analysis algorithm analyzes color data and image metadata to measure the corresponding Hgb level. By quantifying clinical pallor, this system non-invasively measures Hgb levels to within a clinically significant and well accepted margin of error (±2.6 g/dL) of the gold standard Hgb measurement tool with a sensitivity and specificity of 0.90 and 0.82, respectively, of predicting anemia (defined as Hgb < 11.0g/dL) in 100 pediatric patients at Children’s Healthcare of Atlanta with anemia of any etiology mixed with healthy subjects. This algorithm has been implemented into a smartphone app that is capable of outperforming trained hematologists in physical examination-based Hgb measurement. Overall, this technology has the capability to change the treatment paradigm for anemia as patients no longer need to visit a clinic to monitor their hemoglobin. In this thesis, I discuss the development of this image analysis algorithm and the implementation of the algorithm into a smartphone app.
Advisors/Committee Members: Lam, Wilbur A. (advisor), Boudreaux, Jeanne (committee member), Clifford, Gari D. (committee member), Cooper, Lee A. D. (committee member), Qiu, Peng (committee member).
Subjects/Keywords: Anemia; Point-of-care diagnostics; mHealth
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mannino, R. G. (2018). A noninvasive, image-based smartphone app for diagnosing anemia. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/61131
Chicago Manual of Style (16th Edition):
Mannino, Robert G. “A noninvasive, image-based smartphone app for diagnosing anemia.” 2018. Doctoral Dissertation, Georgia Tech. Accessed February 25, 2021.
http://hdl.handle.net/1853/61131.
MLA Handbook (7th Edition):
Mannino, Robert G. “A noninvasive, image-based smartphone app for diagnosing anemia.” 2018. Web. 25 Feb 2021.
Vancouver:
Mannino RG. A noninvasive, image-based smartphone app for diagnosing anemia. [Internet] [Doctoral dissertation]. Georgia Tech; 2018. [cited 2021 Feb 25].
Available from: http://hdl.handle.net/1853/61131.
Council of Science Editors:
Mannino RG. A noninvasive, image-based smartphone app for diagnosing anemia. [Doctoral Dissertation]. Georgia Tech; 2018. Available from: http://hdl.handle.net/1853/61131

University of New South Wales
12.
Natoli, Lisa.
Health service implications of the introduction of STI point-of-care testing in Australia.
Degree: Kirby Institute, 2015, University of New South Wales
URL: http://handle.unsw.edu.au/1959.4/56876
;
https://unsworks.unsw.edu.au/fapi/datastream/unsworks:41829/SOURCE02?view=true
► Chlamydia trachomatis (CT) and Neisseria gonorrhoea (NG) are curable sexually transmissible infections (STIs) which represent a significant public health burden, particularly in young Australia Aboriginal…
(more)
▼ Chlamydia trachomatis (CT) and Neisseria gonorrhoea (NG) are curable sexually transmissible infections (STIs) which represent a significant public health burden, particularly in young Australia Aboriginal people in remote communities. Prompt testing and treatment is fundamental to STI control yet distance to urban laboratories is a significant barrier. CT/NG
point-of-
care (POC) testing offers an ideal solution, but until recently had been unavailable. This thesis aims to identify settings where POC testing could be beneficial, benefits and barriers to implementation and health service staff acceptability.The thesis was based on two sets of qualitative interviews. The first occurred with 18 Australian key informants with remote, sexual health and laboratory expertise, and generated three discrete studies. The second occurred with 16 trained nurses and Aboriginal health workers (AHWs) from the first 12 remote primary
care services internationally to use GeneXpert CT/NG POC testing and resulted in study four. Study one focused on settings where the technology would have greatest benefit, with remote Aboriginal communities most commonly identified, as well as juvenile justice and outreach services to highly mobile or marginalised populations. In study two, informants identified the benefits of POC use for clinical practice including improved management of STIs- more timely and targeted treatment, earlier commencement of partner notification, and reduced effort associated with client recall, but noted it will result in changes to the STI management pathway, and policy and clinical guidelines may need to be altered. Study three focused on the public health implications; with the key perceived benefit being STI control, and barriers including the potential to negatively impact on disease notification and NG antibiotic sensitivity surveillance. In study four, most nurses and AHWs found the test easy to use and useful, and reported improved management of STIs consistent with the key informant’s perceived benefits. In conclusion, this thesis has provided information to inform implementation of CT/NG POC testing, including selection of appropriate settings, and the need to review clinical guidelines and establish systems to avoid adverse impact on public health surveillance. Importantly the research demonstrated the new technology was highly acceptable to staff working in remote primary
care.
Advisors/Committee Members: Guy, Rebecca, Kirby Institute, Faculty of Medicine, UNSW, Maher, Lisa, Kirby Institute, Faculty of Medicine, UNSW, Shephard, mark, Flinders University, Anderson, David, Burnet Institute.
Subjects/Keywords: Aboriginal communities; STI; Point of care
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Natoli, L. (2015). Health service implications of the introduction of STI point-of-care testing in Australia. (Doctoral Dissertation). University of New South Wales. Retrieved from http://handle.unsw.edu.au/1959.4/56876 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:41829/SOURCE02?view=true
Chicago Manual of Style (16th Edition):
Natoli, Lisa. “Health service implications of the introduction of STI point-of-care testing in Australia.” 2015. Doctoral Dissertation, University of New South Wales. Accessed February 25, 2021.
http://handle.unsw.edu.au/1959.4/56876 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:41829/SOURCE02?view=true.
MLA Handbook (7th Edition):
Natoli, Lisa. “Health service implications of the introduction of STI point-of-care testing in Australia.” 2015. Web. 25 Feb 2021.
Vancouver:
Natoli L. Health service implications of the introduction of STI point-of-care testing in Australia. [Internet] [Doctoral dissertation]. University of New South Wales; 2015. [cited 2021 Feb 25].
Available from: http://handle.unsw.edu.au/1959.4/56876 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:41829/SOURCE02?view=true.
Council of Science Editors:
Natoli L. Health service implications of the introduction of STI point-of-care testing in Australia. [Doctoral Dissertation]. University of New South Wales; 2015. Available from: http://handle.unsw.edu.au/1959.4/56876 ; https://unsworks.unsw.edu.au/fapi/datastream/unsworks:41829/SOURCE02?view=true

McMaster University
13.
Wolfe, Michael.
Point-of-need biosensors for the detection of respiratory biomarkers.
Degree: PhD, 2019, McMaster University
URL: http://hdl.handle.net/11375/25040
► Asthma is a chronic disease affecting over 300 million people worldwide. Airway inflammation is a central feature of asthma. Quantitative sputum cytometry is the most…
(more)
▼ Asthma is a chronic disease affecting over 300 million people worldwide. Airway inflammation is a central feature of asthma. Quantitative sputum cytometry is the most validated method to assess this and to adjust anti-inflammatory therapy, yet it is underutilized due to rigorous processing that requires expensive specialized technicians. To address these limitations, this thesis focuses on the development of several point of need biosensors that rapidly quantify respiratory biomarkers as alternatives to traditional laboratory tests. The project began by developing a paper based sensor for detection of myeloperoxidase (MPO), a neutrophil biomarker. A test was developed using commercially available antibodies, showing direct correlation between the test line colour intensity and total neutrophils. This work was expanded to include a second protein target, eosinophil peroxidase (EPX), for identification of eosinophils. Although the test performed well using neat samples, it failed to identify EPX in clinical sputum samples. Analyzing pre-treatment methods identified that a quick immunoprecipitation technique using protein A/G beads followed by syringe filtration allowed for the device to successfully quantify EPX, eliminating the need for a centrifuge. However, the limited supply of commercial anti-EPX antibodies combined with the need for sample pre-treatment prompted investigation into alternative detection avenues. Nucleic acid aptamers were explored, with aptamer selection for EPX producing several aptamer candidates. Binding affinity and specificity tests were performed, with the T1-5 aptamer emerging. T1-5 was capable of selectively binding EPX over MPO with high affinity. This aptamer was integrated into a simple pull-down assay, capable of detecting EPX with an order of magnitude lower limit of detection than the antibody test. Overall this work has developed multiple sensors with the potential to overcome the limitations of accessibility to sputum cytometry, rapidly identify the presence and type of airway inflammation, and deliver personalized treatment strategies that not only reduce the global healthcare burden, but also greatly improve a patient’s quality of life.
Thesis
Doctor of Philosophy (PhD)
Advisors/Committee Members: Brennan, John D., Chemical Biology.
Subjects/Keywords: Biosensors; Point-of-Need; Point-of-care; Asthma; Aptamer; SELEX; Antibody; Lateral Flow
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Wolfe, M. (2019). Point-of-need biosensors for the detection of respiratory biomarkers. (Doctoral Dissertation). McMaster University. Retrieved from http://hdl.handle.net/11375/25040
Chicago Manual of Style (16th Edition):
Wolfe, Michael. “Point-of-need biosensors for the detection of respiratory biomarkers.” 2019. Doctoral Dissertation, McMaster University. Accessed February 25, 2021.
http://hdl.handle.net/11375/25040.
MLA Handbook (7th Edition):
Wolfe, Michael. “Point-of-need biosensors for the detection of respiratory biomarkers.” 2019. Web. 25 Feb 2021.
Vancouver:
Wolfe M. Point-of-need biosensors for the detection of respiratory biomarkers. [Internet] [Doctoral dissertation]. McMaster University; 2019. [cited 2021 Feb 25].
Available from: http://hdl.handle.net/11375/25040.
Council of Science Editors:
Wolfe M. Point-of-need biosensors for the detection of respiratory biomarkers. [Doctoral Dissertation]. McMaster University; 2019. Available from: http://hdl.handle.net/11375/25040

University of the Western Cape
14.
Mpotulo, Nombuto Gloria.
Factors affecting antenatal point of care testing for syphilis, anaemia and HIV in primary health care centres in Sedibeng district, South Africa
.
Degree: 2014, University of the Western Cape
URL: http://hdl.handle.net/11394/4686
► Background: Point of Care Testing (POCT) refers to qualitative or quantitative tests done in health facilities where the patient is being attended to (on-site), and…
(more)
▼ Background:
Point of
Care Testing (POCT) refers to qualitative or quantitative tests done in health facilities where the patient is being attended to (on-site), and not in the conventional hospital laboratory setting. As a consequence of many developing countries not having access to conventional laboratory services (with trained laboratory personnel), diagnostic testing often relies on the availability of valid POC tests. All pregnant women attending antenatal
care clinics in the Sedibeng District Primary Health
Care (PHC) centres should be screened for syphilis, anaemia and HIV. This can be done by means of POC testing, which is easy to perform. These POC tests provide results promptly allowing treatment to be commenced immediately, if required. Despite this highly desirable benefit of POCT, there is circumstantial evidence which suggests that staff is choosing to send specimens to the laboratory for testing, instead of doing POCT themselves. The extent to which this happens and the factors contributing to this practice are not clear. Aim: The aim of this study was to assess the prevalence of screening for syphilis, anaemia, and HIV amongst pregnant women during their first antenatal
care visit to PHC facilities in the Sedibeng District, and to establish the factors affecting the prevalence of appropriately using POCT for screening tests. Methodology: Study design: A quantitative, analytical, cross-sectional study was conducted. Study Population and Sample: Patient registers, staff expected to perform POCT and facility managers. 33 District’s health
care workers expected to perform POCT on pregnant women during the first ANC visit and 30 facility managers from these facilities; 360 patient records (these were collected from a total of 7 200 patients’ records). The data was collected over a six month period (from 1st July 2012 to 31st December 2012). Data collection: Data was collected from 360 patient records to determine the rate, appropriateness and mechanism of screening for syphilis, anaemia and, HIV in pregnant women on their first antenatal visit. Interviewer-administered closed-ended questions was asked from 30 antenatal
care clinic staff tasked with performing POC tests and from 30 PHC facility managers to determine the factors affecting the rate of conducting POCT. Data analysis: Data was analysed using univariate, bivariate and multivariate analyses. Ethical considerations: No harm was anticipated to anyone participating in the study or from the findings of the study. A major benefit of the study was that clarity on the factors affecting the rate of screening and the use of POCT was gained. This will hopefully facilitate the implementation of evidence–based interventions to improve POCT uptake if required.
Advisors/Committee Members: Reagon, Gavin (advisor).
Subjects/Keywords: Syphilis;
Anaemia;
HIV;
Antenatal care centres;
Point-of-care testing;
Primary health care centres
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Mpotulo, N. G. (2014). Factors affecting antenatal point of care testing for syphilis, anaemia and HIV in primary health care centres in Sedibeng district, South Africa
. (Thesis). University of the Western Cape. Retrieved from http://hdl.handle.net/11394/4686
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Mpotulo, Nombuto Gloria. “Factors affecting antenatal point of care testing for syphilis, anaemia and HIV in primary health care centres in Sedibeng district, South Africa
.” 2014. Thesis, University of the Western Cape. Accessed February 25, 2021.
http://hdl.handle.net/11394/4686.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Mpotulo, Nombuto Gloria. “Factors affecting antenatal point of care testing for syphilis, anaemia and HIV in primary health care centres in Sedibeng district, South Africa
.” 2014. Web. 25 Feb 2021.
Vancouver:
Mpotulo NG. Factors affecting antenatal point of care testing for syphilis, anaemia and HIV in primary health care centres in Sedibeng district, South Africa
. [Internet] [Thesis]. University of the Western Cape; 2014. [cited 2021 Feb 25].
Available from: http://hdl.handle.net/11394/4686.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Mpotulo NG. Factors affecting antenatal point of care testing for syphilis, anaemia and HIV in primary health care centres in Sedibeng district, South Africa
. [Thesis]. University of the Western Cape; 2014. Available from: http://hdl.handle.net/11394/4686
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Universitat Politècnica de València
15.
Yamanaka, Eric Seiti.
Isothermal-based DNA biosensors for application in pharmacogenetics
.
Degree: 2020, Universitat Politècnica de València
URL: http://hdl.handle.net/10251/148366
► [EN] The determination of genetic biomarkers is progressively becoming more extended and popular, being commercialized even in kits for personalized medicine. Establishing specific genotype variations…
(more)
▼ [EN] The determination of genetic biomarkers is progressively becoming more extended and popular, being commercialized even in kits for personalized medicine. Establishing specific genotype variations for each patient, such as single nucleotide polymorphisms (SNPs), could be a fundamental tool in the field of diagnosis, prognosis and therapy selection. However, the use of DNA testing is not fully implemented in general healthcare, mainly due to technical and economic barriers associated to the current technologies, which are limited only to specialized centers and large hospitals.
In this thesis, the main goal was to overcome these obstacles by developing simpler, faster and more affordable
point-of-
care (POC) genotyping systems. Allele discrimination was achieved by employing isothermal enzymatic reactions, like recombinase polymerase amplification (RPA), ligation of oligonucleotides and loop-mediated isothermal amplification (LAMP). These processes were integrated to colorimetric indicators and immunoenzymatic assays, in a microarray format. Using compact discs and polycarbonate chips as platforms, the detection was achieved through widespread electronics, like disc-reader, flatbed scanner and smartphone. To demonstrate their capacities, the resulting systems were applied for identifying SNPs in human samples, associated to therapies for tobacco smoking cessation, major depression disorder and blood clotting-related diseases.
After selecting the proper conditions, all studied strategies discriminated SNPs in samples containing as low as 100 copies of genomic DNA, with an error rate below 15%. Most importantly, the developed methods have reduced assays times varying between 70 and 140 minutes, at a cost similar to a conventional PCR-based analog, but maintaining or raising amplification efficiency and eliminating the need of specialized temperature cyclers and fluorescence scanners.
In conclusion, the biosensors based in isothermal reactions and consumer electronics devices greatly improve the competitivity of POC DNA analysis. It was demonstrated that the technologies developed in this thesis could support genotyping assays in low-resource areas, such as primary healthcare centers and emerging countries. Through this democratization of genetic testing and by performing adequate association studies, molecular diagnostics and personalized medicine practices could have their application extended to the clinical routine.
Advisors/Committee Members: Maquieira Catala, Ángel (advisor), Tortajada Genaro, Luis Antonio (advisor).
Subjects/Keywords: DNA;
Pharmacogenetics;
Single nucleotide polymorphism;
Point mutation;
Point-of-care;
Biosensor;
Isothermal amplification;
Consumer electronics
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Yamanaka, E. S. (2020). Isothermal-based DNA biosensors for application in pharmacogenetics
. (Doctoral Dissertation). Universitat Politècnica de València. Retrieved from http://hdl.handle.net/10251/148366
Chicago Manual of Style (16th Edition):
Yamanaka, Eric Seiti. “Isothermal-based DNA biosensors for application in pharmacogenetics
.” 2020. Doctoral Dissertation, Universitat Politècnica de València. Accessed February 25, 2021.
http://hdl.handle.net/10251/148366.
MLA Handbook (7th Edition):
Yamanaka, Eric Seiti. “Isothermal-based DNA biosensors for application in pharmacogenetics
.” 2020. Web. 25 Feb 2021.
Vancouver:
Yamanaka ES. Isothermal-based DNA biosensors for application in pharmacogenetics
. [Internet] [Doctoral dissertation]. Universitat Politècnica de València; 2020. [cited 2021 Feb 25].
Available from: http://hdl.handle.net/10251/148366.
Council of Science Editors:
Yamanaka ES. Isothermal-based DNA biosensors for application in pharmacogenetics
. [Doctoral Dissertation]. Universitat Politècnica de València; 2020. Available from: http://hdl.handle.net/10251/148366
16.
SOARES, Erika Cristina de Lima.
Desenvolvimento de testes diagnósticos para Hepatite B baseados em imunossensores
.
Degree: 2016, Universidade Federal de Pernambuco
URL: https://repositorio.ufpe.br/handle/123456789/18699
► A infecção pelo vírus da Hepatite B (HBV) é considerada uma enfermidade de alta morbimortalidade, apresentando diagnóstico complexo e quadro de persistência, fatores que dificultam…
(more)
▼ A infecção pelo vírus da Hepatite B (HBV) é considerada uma enfermidade de alta
morbimortalidade, apresentando diagnóstico complexo e quadro de persistência, fatores que
dificultam a detecção, terapêutica e cura. Relatos variados têm apontado os imunossensores
como importantes ferramentas de auxílio no diagnóstico de doenças, definido como um
dispositivo que converte respostas de eventos biológicos a partir da interação antígenoanticorpo
em sinal elétrico. No presente estudo foram desenvolvidos biossensores para
detecção de anticorpos contra o nucleocapsídeo do HBV (Anti-HBc) mais perene apresentado
no diagnóstico da doença. Recentemente, o emprego de nanomateriais no desenvolvimento de
tais dispositivos tem despertado interesse devido às propriedades destes materiais.
Particularmente, os nanotubos de carbono (NTCs) têm oferecido aos imunossensores melhoria
na condutividade, aumento na velocidade de transferência de carga, aumento da área
eletródica com maior possibilidade de imobilização de biomoléculas. Nesta tese, foram
empregados o ácido hialurônico e o náfion como suporte para forte interação com os NTC
funcionalizados em eletrodos de carbono vítreo e de ouro fabricado sobre folha de acetato. Os
dispositivos foram caracterizados por técnicas de imagem (microscopia de força atômica) e
eletroquímicas (voltametrias de onda quadrada e cíclica), as quais demonstraram a
estabilidade da plataforma, imobilização eficaz e sensibilidade. O primeiro protótipo em
eletrodos de carbono vítreo modificado com filme de ácido hialurônico associado a nanotubos
funcionalizados apresentou resposta linear de 1 a 6ng/ml com limite de detcção de 0,03ng/ml.
No segundo protótipo com eletrodos impressos de ouro modificado com filme etanólico de
náfion associado a nanotubos funcionalizados, o imunossensor apresentou resposta linear de
0,5 até 2ng/ml, com limite de detecção de 0,15 ng/ml de anti-HBc. Os protótipos
desenvolvidos apresentam-se como potenciais para diagóstico da HBV.
Advisors/Committee Members: DUTRA, Rosa Amália Fireman (advisor), http://lattes.cnpq.br/3335497739195055 (advisor).
Subjects/Keywords: Imunossensor;
Nanotecnologia;
Hepatite B;
Dispositivos point-of-care;
Diagnóstico;
Immunosensor;
Nanotechnology;
Hepatitis B;
point-of-care devices;
diagnostics
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APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
SOARES, E. C. d. L. (2016). Desenvolvimento de testes diagnósticos para Hepatite B baseados em imunossensores
. (Thesis). Universidade Federal de Pernambuco. Retrieved from https://repositorio.ufpe.br/handle/123456789/18699
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
SOARES, Erika Cristina de Lima. “Desenvolvimento de testes diagnósticos para Hepatite B baseados em imunossensores
.” 2016. Thesis, Universidade Federal de Pernambuco. Accessed February 25, 2021.
https://repositorio.ufpe.br/handle/123456789/18699.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
SOARES, Erika Cristina de Lima. “Desenvolvimento de testes diagnósticos para Hepatite B baseados em imunossensores
.” 2016. Web. 25 Feb 2021.
Vancouver:
SOARES ECdL. Desenvolvimento de testes diagnósticos para Hepatite B baseados em imunossensores
. [Internet] [Thesis]. Universidade Federal de Pernambuco; 2016. [cited 2021 Feb 25].
Available from: https://repositorio.ufpe.br/handle/123456789/18699.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
SOARES ECdL. Desenvolvimento de testes diagnósticos para Hepatite B baseados em imunossensores
. [Thesis]. Universidade Federal de Pernambuco; 2016. Available from: https://repositorio.ufpe.br/handle/123456789/18699
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
17.
Gosselin, David.
Vers un dispositif de diagnostic point of care intégré : utilisation de la capillarité ainsi que des procédés de thermoformage et de sérigraphie. : Towards an integrated device for point-of-care diagnostics : use of capillarity with thermoforming and screen-printing processes.
Degree: Docteur es, MEP : Mécanique des fluides Energétique, Procédés, 2017, Université Grenoble Alpes (ComUE)
URL: http://www.theses.fr/2017GREAI111
► Grâce aux technologies de la microfluidique (i.e. la manipulation d'un fluide dans un système ayant une dimension caractéristique sub-millimétrique), il est possible d'imaginer l'intégration de…
(more)
▼ Grâce aux technologies de la microfluidique (i.e. la manipulation d'un fluide dans un système ayant une dimension caractéristique sub-millimétrique), il est possible d'imaginer l'intégration de l'ensemble des fonctions ordinairement réalisées en laboratoire dans un système miniaturisé, réalisant ainsi un laboratoire sur puce. Cela peut ainsi permettre d'allier efficacité et bas-coût requis pour la réalisation de dispositif de diagnositcs médicaux utilisable en dehors d'infrastructure médicalisée, souvent appelés systèmes Point-of-Care. Pour la réalisation d'un tel dispositif, il semble important de concevoir l'intégration des différents composants du système d'une façon cohérente, et en prenant en compte l'ensemble des contraintes imposées par l'application finale ciblée. Le travail effectué au cours de cette thèse a ainsi été réalisé dans l'optique de proposer une réponse à cette problématique d'intégration dans le cadre du développement d'un système microfluidique de diagnostic Point-of-Care basé sur une réaction d'amplification d'ADN isotherme LAMP. Afin de pouvoir proposer un système bon marché et dont l'industrialisation est aisée, nous avons fait appel à l'utilisation du papier comme support et au thermoformage comme moyen de production. En effet à la fois l'industrie papetière et le procédé de thermoformage sont d'ores et déjà existant et proposent des fabrications en série. De plus, le faible coût du matériau et du procédé en question permettent d'envisager un dispositif final à bas-coût. Afin de pouvoir effectuer et détecter la réaction de LAMP la présence de fonctions actives telles qu'un chauffage et un outil de détection est nécessaire. Pour ces dernières, l'intégration a été réalisée par procédé sérigraphique. Le chauffage est effectué par effet Joule grâce au dépôt d'une couche d'encre conductrice à base de carbone. La détection est quant à elle faite par méthode potentiométrique, à l'aide d'électrode couverte de polyaniline. Il sera également montré que l'utilisation de ces méthodes de fabrication est pertinente en termes d'intégration car elles permettent une superposition des différentes fonctions actives, mais également leur intégration directement dans le système microfluidique.
Developments of microfluidics - the study of flows at the sub-millimetric dimensions - have made possible the integration of most of the macroscopic functions of laboratory fluidic systems in a miniaturized system, thus realizing a lab on a chip. This allows the conception of low cost, sensitive and efficient medical diagnostic device usable outside of a medical infrastructure. Such devices are called Point-of-Care (PoC) systems. The design and fabrication of such devices requires an elaborated and coherent integration that takes into account all the constraints imposed by the targeted final application.The work reported here, and performed during the PhD internship, is focused on the study of the concept and development of the integration of a PoC device based on the isothermal LAMP (Loop mediated AMPlification)…
Advisors/Committee Members: Chaussy, Didier (thesis director), Belgacem, Naceur (thesis director).
Subjects/Keywords: Microfluidique; Intégration; Capillarité; Point-Of-Care; Sérigraphie; Thermoformage; Microfluidic; Integration; Capillarity; Point-Of-Care; Screen-Printing; Thermoforming; 620
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Gosselin, D. (2017). Vers un dispositif de diagnostic point of care intégré : utilisation de la capillarité ainsi que des procédés de thermoformage et de sérigraphie. : Towards an integrated device for point-of-care diagnostics : use of capillarity with thermoforming and screen-printing processes. (Doctoral Dissertation). Université Grenoble Alpes (ComUE). Retrieved from http://www.theses.fr/2017GREAI111
Chicago Manual of Style (16th Edition):
Gosselin, David. “Vers un dispositif de diagnostic point of care intégré : utilisation de la capillarité ainsi que des procédés de thermoformage et de sérigraphie. : Towards an integrated device for point-of-care diagnostics : use of capillarity with thermoforming and screen-printing processes.” 2017. Doctoral Dissertation, Université Grenoble Alpes (ComUE). Accessed February 25, 2021.
http://www.theses.fr/2017GREAI111.
MLA Handbook (7th Edition):
Gosselin, David. “Vers un dispositif de diagnostic point of care intégré : utilisation de la capillarité ainsi que des procédés de thermoformage et de sérigraphie. : Towards an integrated device for point-of-care diagnostics : use of capillarity with thermoforming and screen-printing processes.” 2017. Web. 25 Feb 2021.
Vancouver:
Gosselin D. Vers un dispositif de diagnostic point of care intégré : utilisation de la capillarité ainsi que des procédés de thermoformage et de sérigraphie. : Towards an integrated device for point-of-care diagnostics : use of capillarity with thermoforming and screen-printing processes. [Internet] [Doctoral dissertation]. Université Grenoble Alpes (ComUE); 2017. [cited 2021 Feb 25].
Available from: http://www.theses.fr/2017GREAI111.
Council of Science Editors:
Gosselin D. Vers un dispositif de diagnostic point of care intégré : utilisation de la capillarité ainsi que des procédés de thermoformage et de sérigraphie. : Towards an integrated device for point-of-care diagnostics : use of capillarity with thermoforming and screen-printing processes. [Doctoral Dissertation]. Université Grenoble Alpes (ComUE); 2017. Available from: http://www.theses.fr/2017GREAI111
18.
Huet, Maxime.
Agglutination de globules rouges autologues par un réactif bispécifique pour le dosage de biomarqueurs : Autologous red blood cells agglutination by a bispecific reagent for the quantification of biomarker.
Degree: Docteur es, Physique pour les sciences du vivant, 2016, Université Grenoble Alpes (ComUE)
URL: http://www.theses.fr/2016GREAY098
► La détection ou la quantification dans le sang de biomarqueurs peut apporter une précieuse information sur la santé humaine. Cette analyse peut être réalisée directement…
(more)
▼ La détection ou la quantification dans le sang de biomarqueurs peut apporter une précieuse information sur la santé humaine. Cette analyse peut être réalisée directement auprès du patient, on parle alors de POC (point-of-care). L’agglutination de globules rouges par un réactif bispécifique, ciblant d’une part un globule rouge et d’autre part le biomarqueur à doser ou détecter, est proposée comme principe de base d’un test POC autonome et quantitatif. L’automatisation du protocole d’agglutination en microfluidique, ainsi que la mesure optique de la cinétique de l’agglutination sont explorées selon trois questions. La première concerne la possibilité de produire de manière autonome et reproductible l’agglutination en microfluidique passive, c’est-à-dire sans apport d’énergie ni de matière autre que l’échantillon. Les deuxième et troisième questions concernent la mesure de la cinétique d’agglutination et l’existence d’un lien entre cette mesure et la concentration du biomarqueur. La formulation et l’embarquement du réactif se sont révélés indispensables pour effectuer une réaction d’agglutination de manière reproductible en microfluidique passive et répondre à la première question. Trois stratégies de mesure de l’agglutination basées sur les propriétés optiques des globules rouges ont été proposées. Deux d’entre elles ont pu être implémentées avec succès. La mesure cinétique de l’agglutination a été mise en place pour un modèle de typage sanguin et a permis la discrimination entre positif et négatif dans 100 % des cas d’agglutinations testés. L’effet de la concentration du biomarqueur sur la mesure de l’agglutination avec un réactif bispécifique a été démontré avec le modèle du biomarqueur D-dimère, répondant à la dernière question posée en début de thèse.
The detection or quantification of biomarkers in the blood can provide valuable information on human health. An analysis directly performed at the patient bedside is called a Point-of-care test (POC). The agglutination of red blood cells by a bispecific reagent combining a biomarker binding part and an erythrocyte binding part is proposed as a basis for an autonomous and quantitative POC test. The integration and automation of the protocol in a microfluidic chip and the optical measurement of the kinetics of agglutination are investigated. The first question concerns the possibility of producing agglutination in passive microfluidic device that is to say without any energy nor any material supply other than the sample. The second and third questions respectively relate to the measurement of the kinetics of aggregation and the existence of a link between this measure and the concentration of the biomarker. The formulation and embedding of the reagents has proved essential to perform a reproducible agglutination reaction in passive microfluidics and thus answer the first question. Three measurement strategies based on the optical properties of the red blood cells have been proposed. Two of them have been successfully implemented. The kinetic measurement of…
Advisors/Committee Members: Buhot, Arnaud (thesis director).
Subjects/Keywords: Microfluidique; Point-Of-Care; Sang; Agglutination; Dosage; Traitement d'image; Microfluidic; Point-Of-Care; Blood; Agglutination; Quantification; Image processing; 530
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Huet, M. (2016). Agglutination de globules rouges autologues par un réactif bispécifique pour le dosage de biomarqueurs : Autologous red blood cells agglutination by a bispecific reagent for the quantification of biomarker. (Doctoral Dissertation). Université Grenoble Alpes (ComUE). Retrieved from http://www.theses.fr/2016GREAY098
Chicago Manual of Style (16th Edition):
Huet, Maxime. “Agglutination de globules rouges autologues par un réactif bispécifique pour le dosage de biomarqueurs : Autologous red blood cells agglutination by a bispecific reagent for the quantification of biomarker.” 2016. Doctoral Dissertation, Université Grenoble Alpes (ComUE). Accessed February 25, 2021.
http://www.theses.fr/2016GREAY098.
MLA Handbook (7th Edition):
Huet, Maxime. “Agglutination de globules rouges autologues par un réactif bispécifique pour le dosage de biomarqueurs : Autologous red blood cells agglutination by a bispecific reagent for the quantification of biomarker.” 2016. Web. 25 Feb 2021.
Vancouver:
Huet M. Agglutination de globules rouges autologues par un réactif bispécifique pour le dosage de biomarqueurs : Autologous red blood cells agglutination by a bispecific reagent for the quantification of biomarker. [Internet] [Doctoral dissertation]. Université Grenoble Alpes (ComUE); 2016. [cited 2021 Feb 25].
Available from: http://www.theses.fr/2016GREAY098.
Council of Science Editors:
Huet M. Agglutination de globules rouges autologues par un réactif bispécifique pour le dosage de biomarqueurs : Autologous red blood cells agglutination by a bispecific reagent for the quantification of biomarker. [Doctoral Dissertation]. Université Grenoble Alpes (ComUE); 2016. Available from: http://www.theses.fr/2016GREAY098
19.
Michel-Lepage, Audrey.
Améliorer la prescription médicamenteuse grâce à des mécanismes économiques? : Improving drug prescription thanks to economic mechanisms.
Degree: Docteur es, Sciences économiques, 2016, Aix Marseille Université
URL: http://www.theses.fr/2016AIXM2028
► Le mésusage des antibiotiques et l’antibio-résistance sont devenus un cheval de bataille des autorités sanitaires internationales. L’objectif de ma thèse est d’analyser et évaluer les…
(more)
▼ Le mésusage des antibiotiques et l’antibio-résistance sont devenus un cheval de bataille des autorités sanitaires internationales. L’objectif de ma thèse est d’analyser et évaluer les différents types d’incitations qui amèneraient les médecins à « mieux » prescrire des antibiotiques. La première partie est une revue de littérature dans laquelle j’analyse les interactions entre les différents acteurs du système de santé français, les incitations monétaires et les incitations non-monétaires. Les seconde et troisième parties illustrent la première par des analyses principalement empiriques, qui ont été publiées ou envoyées à des revues. La deuxième partie étudie l’utilisation et l’impact d’outils diagnostiques comme aide à la prescription d’antibiotiques avec d’une part les tests de diagnostics rapides pour l’angine, et d’autre part les tests microbiologiques point-of-care, faits « au lit du patient ». La troisième partie analyse le paiement à la performance comme incitation monétaire à l’amélioration des prescriptions médicamenteuses et notamment des antibiotiques.
Antibiotic misuse and antibiotic resistance are increasing concern for international health authorities. The goal of my thesis is to assess the different incentives which would lead physicians to optimize their antibiotic prescriptions. The first part is a literature review analysing interactions between the agents of the French health system. I evaluate also financial and non-monetary incentives. The second and third parts illustrates the first one through empiric analyses, which have been published or sent to a review. The second part studies the use and the impact of diagnostic tests as a help for antibiotics prescribing, with on one hand the use of rapid diagnostic tests detecting tonsillitis, and on the other hand microbiological tests called Point-Of-care made at the patient bedside. The third part analyses the pay-for-performance program as a financial incentive for improving drugs prescriptions and notably antibiotics.
Advisors/Committee Members: Ventelou, Bruno (thesis director), Drancourt, Michel (thesis director).
Subjects/Keywords: Incitations; Prescription; Point Of Care; Capi; Antibiotiques; Comportement; Médecins; Incentives; Prescription; Point of care; Capi; Antibiotics; Behaviours; General practitioners
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Michel-Lepage, A. (2016). Améliorer la prescription médicamenteuse grâce à des mécanismes économiques? : Improving drug prescription thanks to economic mechanisms. (Doctoral Dissertation). Aix Marseille Université. Retrieved from http://www.theses.fr/2016AIXM2028
Chicago Manual of Style (16th Edition):
Michel-Lepage, Audrey. “Améliorer la prescription médicamenteuse grâce à des mécanismes économiques? : Improving drug prescription thanks to economic mechanisms.” 2016. Doctoral Dissertation, Aix Marseille Université. Accessed February 25, 2021.
http://www.theses.fr/2016AIXM2028.
MLA Handbook (7th Edition):
Michel-Lepage, Audrey. “Améliorer la prescription médicamenteuse grâce à des mécanismes économiques? : Improving drug prescription thanks to economic mechanisms.” 2016. Web. 25 Feb 2021.
Vancouver:
Michel-Lepage A. Améliorer la prescription médicamenteuse grâce à des mécanismes économiques? : Improving drug prescription thanks to economic mechanisms. [Internet] [Doctoral dissertation]. Aix Marseille Université 2016. [cited 2021 Feb 25].
Available from: http://www.theses.fr/2016AIXM2028.
Council of Science Editors:
Michel-Lepage A. Améliorer la prescription médicamenteuse grâce à des mécanismes économiques? : Improving drug prescription thanks to economic mechanisms. [Doctoral Dissertation]. Aix Marseille Université 2016. Available from: http://www.theses.fr/2016AIXM2028

Nelson Mandela Metropolitan University
20.
Van Rooyen, Annesty Elaine.
Experiences of medical practitioners regarding the accessing of information at the point-of-care via mobile technology for clinical decision making at public hospitals.
Degree: Faculty of Health Sciences, 2016, Nelson Mandela Metropolitan University
URL: http://hdl.handle.net/10948/5554
► Medical practitioners are often unable to access medical and health information at the point-of-care, thus preventing them from providing quality healthcare. Family Health International 360…
(more)
▼ Medical practitioners are often unable to access medical and health information at the point-of-care, thus preventing them from providing quality healthcare. Family Health International 360 (FHI) provided medical practitioners with a locally relevant, reliable, and accurate comprehensive library of medical information on mobile computing devices (MCDs), at the point-of-care, as part of a project in collaboration with the Department of Health in the Eastern Cape Province. As part of the latter project, Ricks (2012:7) conducted an investigation into the impact that accessing health information at the point-of-care, via MCDs, had on the clinical decision-making practice of medical practitioners and professional nurses in public hospitals and primary healthcare settings in the Eastern Cape Province. The researcher identified a gap in the aforementioned study and was thus motivated to conduct this study to explore and describe the experiences of medical practitioners at public hospitals in further detail by conducting a qualitative study, as the previous study was quantitative. The purpose of this study was therefore to explore and describe the experiences of medical practitioners regarding the accessing of information at the point-of-care, via mobile technology, for clinical decision making at public hospitals. To achieve the purpose of the study, a qualitative, explorative, descriptive and contextual research design was used. The research population comprised medical practitioners who were using MCDs to access information at the point-of-care for clinical decision making. Purposive sampling was used to select the research sample. Semi-structured interviews were used to collect the necessary research data. Tesch’s steps were used to analyse the data. The principles for ensuring trustworthiness and ethical considerations were adhered to throughout the study. Two main themes and six sub-themes emerged in relation to the experiences of medical practitioners regarding the accessing of information at the point-of-care, for clinical decision making, via mobile technology. The main findings of the research highlighted the benefits and challenges that were experienced by the medical practitioners when using the MCDs for accessing information at the point-of-care for clinical decision making. The study concludes with recommendations pertaining to the areas of practise, education and research.
Subjects/Keywords: Clinical medicine – Decision making; Point-of-care testing; Mobile computing
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Van Rooyen, A. E. (2016). Experiences of medical practitioners regarding the accessing of information at the point-of-care via mobile technology for clinical decision making at public hospitals. (Thesis). Nelson Mandela Metropolitan University. Retrieved from http://hdl.handle.net/10948/5554
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Van Rooyen, Annesty Elaine. “Experiences of medical practitioners regarding the accessing of information at the point-of-care via mobile technology for clinical decision making at public hospitals.” 2016. Thesis, Nelson Mandela Metropolitan University. Accessed February 25, 2021.
http://hdl.handle.net/10948/5554.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Van Rooyen, Annesty Elaine. “Experiences of medical practitioners regarding the accessing of information at the point-of-care via mobile technology for clinical decision making at public hospitals.” 2016. Web. 25 Feb 2021.
Vancouver:
Van Rooyen AE. Experiences of medical practitioners regarding the accessing of information at the point-of-care via mobile technology for clinical decision making at public hospitals. [Internet] [Thesis]. Nelson Mandela Metropolitan University; 2016. [cited 2021 Feb 25].
Available from: http://hdl.handle.net/10948/5554.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Van Rooyen AE. Experiences of medical practitioners regarding the accessing of information at the point-of-care via mobile technology for clinical decision making at public hospitals. [Thesis]. Nelson Mandela Metropolitan University; 2016. Available from: http://hdl.handle.net/10948/5554
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of California – Irvine
21.
Kong, Ling Xuan.
Fully Integrated Molecular Diagnostic CD Platform Based on Thermal Control.
Degree: Biomedical Engineering, 2015, University of California – Irvine
URL: http://www.escholarship.org/uc/item/7wr9v6zj
► Centrifugal microfluidics, or compact disc (CD) microfluidics, has been gaining popularity in the lab-on-a-chip field as an advanced diagnostic platform over the last fifteen years.…
(more)
▼ Centrifugal microfluidics, or compact disc (CD) microfluidics, has been gaining popularity in the lab-on-a-chip field as an advanced diagnostic platform over the last fifteen years. The lab-on-a-disc (LoD) platform embodies advantages of the lab-on-a-chip platform, including small volumes, fast reaction times, low power consumption, and portability; it also has other unique advantages, including embedded fluid pump operation and ease of automation and multiplexing. These advantages make the lab-on-a-disc diagnostic system attractive due to its capability for rapid disease diagnosis. In clinical diagnostics, rapid nucleic acid biomarker detection generally has been a challenge especially due to the rigorous thermocycling required to bring the biomarker quantity up to a delectable level. This work follows the development of a diagnostic microfluidic disc that utilizes polymerase chain reaction for DNA amplification and a DNA microarray that allows for visual detection of numerous target biomarkers. The assay begins with a sample volume that undergoes preparation, thermocycling, post-processing, and detection, so a number of challenges must be addressed; these challenges include precise fluid manipulation, application of heat, and storage and release of reagents. Along the way, modular fluid-handling techniques, including the thermo-pneumatic pump (TPP) and the multifunctional wax valves (MWV), were implemented to reduce the complexity and cost of the overall hardware system. This system would not only be capable of nucleic acid amplification but also specialized multiplexed biomarker amplification and detection. It is anticipated that this platform will provide a foundation for the development of other fully-integrated LoD systems for rapid disease diagnosis in the near future.
Subjects/Keywords: Biomedical engineering; centrifugal; diagnostics; microfluidics; molecular; point-of-care; thermal
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Kong, L. X. (2015). Fully Integrated Molecular Diagnostic CD Platform Based on Thermal Control. (Thesis). University of California – Irvine. Retrieved from http://www.escholarship.org/uc/item/7wr9v6zj
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Kong, Ling Xuan. “Fully Integrated Molecular Diagnostic CD Platform Based on Thermal Control.” 2015. Thesis, University of California – Irvine. Accessed February 25, 2021.
http://www.escholarship.org/uc/item/7wr9v6zj.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Kong, Ling Xuan. “Fully Integrated Molecular Diagnostic CD Platform Based on Thermal Control.” 2015. Web. 25 Feb 2021.
Vancouver:
Kong LX. Fully Integrated Molecular Diagnostic CD Platform Based on Thermal Control. [Internet] [Thesis]. University of California – Irvine; 2015. [cited 2021 Feb 25].
Available from: http://www.escholarship.org/uc/item/7wr9v6zj.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Kong LX. Fully Integrated Molecular Diagnostic CD Platform Based on Thermal Control. [Thesis]. University of California – Irvine; 2015. Available from: http://www.escholarship.org/uc/item/7wr9v6zj
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of California – Berkeley
22.
Yeh, Erh-Chia.
Integrated Microfluidic Molecular Diagnostics for Point-of-Care.
Degree: Bioengineering, 2015, University of California – Berkeley
URL: http://www.escholarship.org/uc/item/99s48767
► Ideal point-of-care medical diagnostic devices are low cost assays capable of performing quantitative on-site rapid testing with high sensitivity and minimal manual steps. Current mainstream…
(more)
▼ Ideal point-of-care medical diagnostic devices are low cost assays capable of performing quantitative on-site rapid testing with high sensitivity and minimal manual steps. Current mainstream assays have several key limitations. Take, for instance, the common lateral flow assay—e.g. the pregnancy dipstick test. Such assays produce rapid results at low cost; however, they are mostly qualitative tests yielding only positive/negative results rather than quantitative figures. Other standard immunosorbant assays such as ELISA yield quantitative results but require several hours and extensive manual operation. At the other end of the spectrum, nucleic acid amplification techniques such as quantitative real-time PCR can deliver much higher sensitivity and selectivity. Unfortunately, these require costly equipment and several sample preparation steps. In this thesis, an integrated low-cost microfluidic chip and peripheral technologies for quantitative molecular diagnostics is described. These technical advances are designed to address the prevailing dilemmas described above. Researchers have developed and integrated several key components with microfluidic lab-on-chip miniaturization technology. In line with cutting-edge technology, a novel reagent patterning method, termed “digital micro-patterning”, was developed. A very simple method, it can be adopted at low-resource laboratory settings with mainstream equipment. Digital micro-patterning is unique in the sense that it can digitally pattern and concentrate reagents into highly defined micro-patterns. As a proof of concept, it was possible to pattern isothermal amplification reagents in hundreds of microwells and run amplification reactions in these wells. Next, a next-generation passive microfluidic pumping technology, termed the “vacuum battery system”, has been developed. This system allows for precise passive microfluidic pumping without external pumps, controls, or power sources for up to several hours. It does not require opaque fibers as in capillary systems (e.g. lateral flow assays), thus rendering this pumping method very attractive for optical detection platforms. The vacuum battery system is also significantly more robust compared to previous degas pumping techniques. Due to its portability, excellent optical properties, low cost, and the ability for complete integration with microfluidics, this platform technology opens exciting new opportunities to create a nouveau generation of standalone microfluidic chips readily operable in field settings. Additionally, a microfluidic sample preparation technology termed “digital plasma separation” has been developed. This technology uses parallel micro-cliff-like structures and gravity sedimentation to simultaneously separate plasma and compartmentalize samples into hundreds of micro-wells within minutes. Such sample preparation method enables isothermal digital nucleic acid amplification in one step. As a proof of concept, these technologies were integrated into a single microfluidic chip, termed the…
Subjects/Keywords: Biomedical engineering; diagnostics; digital; microfluidics; Point-of-Care; pumping; sample preparation
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Yeh, E. (2015). Integrated Microfluidic Molecular Diagnostics for Point-of-Care. (Thesis). University of California – Berkeley. Retrieved from http://www.escholarship.org/uc/item/99s48767
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Yeh, Erh-Chia. “Integrated Microfluidic Molecular Diagnostics for Point-of-Care.” 2015. Thesis, University of California – Berkeley. Accessed February 25, 2021.
http://www.escholarship.org/uc/item/99s48767.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Yeh, Erh-Chia. “Integrated Microfluidic Molecular Diagnostics for Point-of-Care.” 2015. Web. 25 Feb 2021.
Vancouver:
Yeh E. Integrated Microfluidic Molecular Diagnostics for Point-of-Care. [Internet] [Thesis]. University of California – Berkeley; 2015. [cited 2021 Feb 25].
Available from: http://www.escholarship.org/uc/item/99s48767.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Yeh E. Integrated Microfluidic Molecular Diagnostics for Point-of-Care. [Thesis]. University of California – Berkeley; 2015. Available from: http://www.escholarship.org/uc/item/99s48767
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

UCLA
23.
Bristow, Claire C.
Contributions to the improvement and understanding of new diagnostics for HIV infection and syphilis.
Degree: Epidemiology, 2015, UCLA
URL: http://www.escholarship.org/uc/item/42p95081
► Syphilis is a curable disease, yet 10 million persons worldwide are infected each year, of which 1.4 million are pregnant women. Syphilis is an infection…
(more)
▼ Syphilis is a curable disease, yet 10 million persons worldwide are infected each year, of which 1.4 million are pregnant women. Syphilis is an infection caused by the spirochete Treponema pallidum and frequently has atypical presentations that may be difficult to differentiate from other sexually transmitted infections (STIs) making effective diagnostics essential to the identification of infection. Additionally, the manifestations of the disease vary depending on the duration of infection and time of presentation. There are four stages-primary, secondary, latent (early and late), and tertiary. Syphilis screening and treatment programs that utilize laboratory-based testing have been hampered by limited laboratory access, long turn-around time for results, and loss to follow-up of syphilis infected individuals. When syphilis diagnostic testing involves multiple tests performed off-site, only a proportion of infected individuals receive treatment and continued transmission occurs. A rapid test is a simple point-of-care test that can be used in a variety of settings and provides a result to guide clinical management during the time of the initial consultation (ideally within 30 minutes or less). The advent of rapid point-of-care tests for syphilis has reduced barriers and allowed for new health systems approaches to syphilis prevention, including same day testing and treatment. Dual rapid tests that have multiple analytes for the detection of antibodies for both HIV and syphilis infections are now available.Our first study addressed preferences for dual HIV/syphilis tests through a conjoint survey analysis. Conjoint analysis is a method for systematically estimating consumer preferences across discrete attributes. Conjoint analysis has been used extensively in marketing research and measures the value that consumers place on each feature of a product. Conjoint analysis has recently begun to be applied in health research. We recruited 298 men and women 18 years of age and over seeking testing or care at GHESKIO (Haitian Study Group for Kaposi’s sarcoma and Opportunistic Infections) clinics. We created 8 hypothetical dual test profiles varying across six dichotomous attributes: cost (free versus 4), accuracy (no false positive versus false positive), time-to-result (20 minutes versus 1 week), blood draw method (finger prick versus venipuncture), number of draws (1 versus 2), and test type (rapid versus laboratory). Cost (free vs. 4; impact score=27.2, SD=36.6, p<.0001) had the highest impact on likelihood of testing, followed by number of blood draws (1 versus 2; impact score=17.5, SD=29.8, p<.0001), blood draw method (fingerprick versus venipuncture; impact score=9.7, SD=26.5, p<.0001), test type (rapid versus laboratory; impact score= -4.5, SD=21.9 , P=.0005), and time-to-result (20 minutes versus 1 week; impact score=3.6, SD=25.6, p=.0139). This analysis showed that implementation of a low cost dual rapid test in the laboratory for HIV and syphilis could be used to improve screening uptake and accessibility to…
Subjects/Keywords: Epidemiology; diagnostics; HIV; point-of-care testing; Syphilis
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bristow, C. C. (2015). Contributions to the improvement and understanding of new diagnostics for HIV infection and syphilis. (Thesis). UCLA. Retrieved from http://www.escholarship.org/uc/item/42p95081
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Bristow, Claire C. “Contributions to the improvement and understanding of new diagnostics for HIV infection and syphilis.” 2015. Thesis, UCLA. Accessed February 25, 2021.
http://www.escholarship.org/uc/item/42p95081.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Bristow, Claire C. “Contributions to the improvement and understanding of new diagnostics for HIV infection and syphilis.” 2015. Web. 25 Feb 2021.
Vancouver:
Bristow CC. Contributions to the improvement and understanding of new diagnostics for HIV infection and syphilis. [Internet] [Thesis]. UCLA; 2015. [cited 2021 Feb 25].
Available from: http://www.escholarship.org/uc/item/42p95081.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Bristow CC. Contributions to the improvement and understanding of new diagnostics for HIV infection and syphilis. [Thesis]. UCLA; 2015. Available from: http://www.escholarship.org/uc/item/42p95081
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Rochester
24.
Bonanno, Lisa (1982 - ).
Advancing porous silicon biosensor technology for use in
clinical diagnostics.
Degree: PhD, 2011, University of Rochester
URL: http://hdl.handle.net/1802/14133
► Inexpensive and robust analytical techniques for detecting molecular recognition events are in great demand in healthcare, food safety, and environmental monitoring. Despite vast research in…
(more)
▼ Inexpensive and robust analytical techniques for
detecting molecular recognition events are in great
demand in
healthcare, food safety, and environmental monitoring. Despite vast
research in this area,
challanges remain to develop practical
biomolecular platforms that meet the rigorous demands of
real-world applications. This includes maintaining low-cost devices
that are sensitive and specific
in complex test specimens, are
stable after storage, have short assay time, and possess minimal
complexity of instrumentation for readout. Nanostructured porous
silicon (PSi) material has been
identified as an ideal candidate
towards achieving these goals and the past decade has seen diverse
proof-of-principle studies developing optical-based sensing
techniques.
In Part 1 of this thesis, the impact of
surface chemistry and PSi morphology on detection sensitivity
of
target molecules is investigated. Initial proof-of-concept that PSi
devices facilitate detection
of protein in whole blood is
demonstrated. This work highlights the importance of material
stability
and blocking chemistry for sensor use in real world
biological samples. In addition, the intrinisic
filtering
capability of the 3-D PSi morphology is shown as an advantage in
complex solutions, such
as whole blood. Ultimately, this initial
work identified a need to improve detection sensitivity of the
PSi
biosensor technique to facilitate clinical diagnostic use over
relevant target concentration ranges.
The second part of this
thesis, builds upon sensitivity challenges that are highlighted in
the first
part of the thesis and development of a surface-bound
competitive inhibition immunoassay facilitated
improved detection
sensitivity of small molecular weight targets (opiates) over a
relevant clinical
concentration range. In addition, optimization
of assay protocol addressed issues of maintaining
stability of
sensors after storage. Performance of the developed assay
(specificity and sensitivity)
was then validated in a blind
clinical study that screened real patient urine samples (n=70) for
opiates in collaboration with Strong Memorial Hospital Clinical
Toxicology Laboratory. PSi sensor
results showed improved clinical
specificity over current commercial opiate immunoassay techniques
and therefore, identified potential for a reduction in
false-negative and false-positive screening results.
Here, we
demonstrate for the first time, successful clinical capability of a
PSi sensor to detect opiates
as a model target in real-world
patient samples.
The final part of this thesis explores
novel sensor designs to leverage the tunable optical properties
of
PSi photonic devices and facilitate colorimetric readout of
molecular recognition events by the
unaided eye. Such a design is
ideal for uncomplicated diagnostic screening at point-of-care as
no
instrumentation is needed for result readout. The photonic PSi
transducers were integrated with
target analyte-responsive
hydrogels (TRAP-gels) that upon exposure to a target solution would
swell
and…
Subjects/Keywords: Sensor; Point-of-care diagnostic; Responsive hydrogel; Porous silicon; Immunoassay
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Bonanno, L. (. -. ). (2011). Advancing porous silicon biosensor technology for use in
clinical diagnostics. (Doctoral Dissertation). University of Rochester. Retrieved from http://hdl.handle.net/1802/14133
Chicago Manual of Style (16th Edition):
Bonanno, Lisa (1982 - ). “Advancing porous silicon biosensor technology for use in
clinical diagnostics.” 2011. Doctoral Dissertation, University of Rochester. Accessed February 25, 2021.
http://hdl.handle.net/1802/14133.
MLA Handbook (7th Edition):
Bonanno, Lisa (1982 - ). “Advancing porous silicon biosensor technology for use in
clinical diagnostics.” 2011. Web. 25 Feb 2021.
Vancouver:
Bonanno L(-). Advancing porous silicon biosensor technology for use in
clinical diagnostics. [Internet] [Doctoral dissertation]. University of Rochester; 2011. [cited 2021 Feb 25].
Available from: http://hdl.handle.net/1802/14133.
Council of Science Editors:
Bonanno L(-). Advancing porous silicon biosensor technology for use in
clinical diagnostics. [Doctoral Dissertation]. University of Rochester; 2011. Available from: http://hdl.handle.net/1802/14133

Rochester Institute of Technology
25.
Hass, Kenneth N.
For the Sensing of Viral DNA: An Integrated Polydimethylsiloxane Accurate CRISPR Detection (IMPACT) System.
Degree: MS, Mechanical Engineering, 2020, Rochester Institute of Technology
URL: https://scholarworks.rit.edu/theses/10347
► Infectious disease outbreaks have become more frequent and extreme in recent years, and as populations continue to grow and the world becomes more interconnected,…
(more)
▼ Infectious disease outbreaks have become more frequent and extreme in recent years, and as populations continue to grow and the world becomes more interconnected, they show no signs of stopping. The current COVID-19 pandemic affecting the world and grinding economies to a halt was known about months ago but could not be contained. One of the largest issues facing the containment of infectious disease is a lack of real-time,
point-of-
care detection devices which can accurately and effectively identify those who are infected so they can be treated and quarantined. Here, an Integrated Micropillar Polydimethylsiloxane Accurate CRISPR Detection (IMPACT) system is developed for detection of viral DNA. Single-stranded DNA reporter probes with fluorescent dyes are immobilized within the system, taking advantage of the increased surface area from the micropillar. A CRISPR-Cas12a and crRNA complex is then injected into the system, and if double-stranded target DNA is present, the CRISPR enzyme is activated and indiscriminately cleaves reporter probes, greatly increasing the fluorescent signal. The system can then be washed and the supernatant collected and measured, revealing accurate detection of the viral DNA target down to 0.1 nM concentration with no fluorescence background.
Advisors/Committee Members: Ke Du.
Subjects/Keywords: CRISPR; DNA; Fluorescence; Microfluidics; Micropillar; Point-of-care
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Hass, K. N. (2020). For the Sensing of Viral DNA: An Integrated Polydimethylsiloxane Accurate CRISPR Detection (IMPACT) System. (Masters Thesis). Rochester Institute of Technology. Retrieved from https://scholarworks.rit.edu/theses/10347
Chicago Manual of Style (16th Edition):
Hass, Kenneth N. “For the Sensing of Viral DNA: An Integrated Polydimethylsiloxane Accurate CRISPR Detection (IMPACT) System.” 2020. Masters Thesis, Rochester Institute of Technology. Accessed February 25, 2021.
https://scholarworks.rit.edu/theses/10347.
MLA Handbook (7th Edition):
Hass, Kenneth N. “For the Sensing of Viral DNA: An Integrated Polydimethylsiloxane Accurate CRISPR Detection (IMPACT) System.” 2020. Web. 25 Feb 2021.
Vancouver:
Hass KN. For the Sensing of Viral DNA: An Integrated Polydimethylsiloxane Accurate CRISPR Detection (IMPACT) System. [Internet] [Masters thesis]. Rochester Institute of Technology; 2020. [cited 2021 Feb 25].
Available from: https://scholarworks.rit.edu/theses/10347.
Council of Science Editors:
Hass KN. For the Sensing of Viral DNA: An Integrated Polydimethylsiloxane Accurate CRISPR Detection (IMPACT) System. [Masters Thesis]. Rochester Institute of Technology; 2020. Available from: https://scholarworks.rit.edu/theses/10347

University of Alberta
26.
Genoway, Shyla G.R.
A Narrative Inquiry into the Experiences of Point-of-Care
HIV Testing Alongside People who were Tested while in a
Correctional Facility or at a Bathhouse.
Degree: Master of Nursing, Faculty of Nursing, 2015, University of Alberta
URL: https://era.library.ualberta.ca/files/765373878
► With a call to increase the accessibility of HIV testing in Canada, point-of-care testing for HIV is being readily adopted. The World Health Organization (WHO,…
(more)
▼ With a call to increase the accessibility of HIV
testing in Canada, point-of-care testing for HIV is being readily
adopted. The World Health Organization (WHO, 2012) outlines the
importance of protecting the human rights of those being tested
through ensuring: informed consent, confidentiality, access to
counselling, correct test results, and a connection to care. Little
attention has been paid to the experiences of people being tested
through HIV point-of-care (POC). Some testing environments, such as
bathhouses and correctional facilities, promote testing for HIV
among higher-risk groups. In this narrative inquiry study I
explored the experience of people testing positive for HIV through
point-of-care while at a bathhouse. I engaged with two men, David
and Chris, over a period of several months, in two to three
conversations between one to almost five hours at a time. The
conversations were transcribed verbatim and analyzed for narrative
threads. Field notes and observations were also collected and
reflections have been incorporated into this study. Three narrative
threads for reconsidering practice were identified: a) seeing
complexities and understanding testing decisions in relation to
time, place, and social context; b) recognizing the impact and
significance of secret and silent stories; and c) tentative and
tension filled connections to care. It is important to understand
testing experiences across time, place, and in diverse social
contexts. These experiences are embedded within larger life
histories of people that further raise questions about adequate
support, follow up and counselling when POC tests are administered
in bathhouses. Listening to the experiences of David and Chris has
also revealed that health policy and public health practices are
shaped by neoliberal discourses.
Subjects/Keywords: narrative inquiry; correctional facility; Point of care; bathhouse; HIV
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Genoway, S. G. R. (2015). A Narrative Inquiry into the Experiences of Point-of-Care
HIV Testing Alongside People who were Tested while in a
Correctional Facility or at a Bathhouse. (Masters Thesis). University of Alberta. Retrieved from https://era.library.ualberta.ca/files/765373878
Chicago Manual of Style (16th Edition):
Genoway, Shyla G R. “A Narrative Inquiry into the Experiences of Point-of-Care
HIV Testing Alongside People who were Tested while in a
Correctional Facility or at a Bathhouse.” 2015. Masters Thesis, University of Alberta. Accessed February 25, 2021.
https://era.library.ualberta.ca/files/765373878.
MLA Handbook (7th Edition):
Genoway, Shyla G R. “A Narrative Inquiry into the Experiences of Point-of-Care
HIV Testing Alongside People who were Tested while in a
Correctional Facility or at a Bathhouse.” 2015. Web. 25 Feb 2021.
Vancouver:
Genoway SGR. A Narrative Inquiry into the Experiences of Point-of-Care
HIV Testing Alongside People who were Tested while in a
Correctional Facility or at a Bathhouse. [Internet] [Masters thesis]. University of Alberta; 2015. [cited 2021 Feb 25].
Available from: https://era.library.ualberta.ca/files/765373878.
Council of Science Editors:
Genoway SGR. A Narrative Inquiry into the Experiences of Point-of-Care
HIV Testing Alongside People who were Tested while in a
Correctional Facility or at a Bathhouse. [Masters Thesis]. University of Alberta; 2015. Available from: https://era.library.ualberta.ca/files/765373878

Cornell University
27.
Oncescu, Vlad-Victor.
Development Of Point-Of-Care Devices For Rapid Diagnostics And Preventive Care.
Degree: PhD, Mechanical Engineering, 2014, Cornell University
URL: http://hdl.handle.net/1813/36188
► With the cost of healthcare in the U.S. predicted to reach 30% of the GDP by 2040, medical technology needs to help reduce the stress…
(more)
▼ With the cost of healthcare in the U.S. predicted to reach 30% of the GDP by 2040, medical technology needs to help reduce the stress on physicians and facilitate personalized preventive
care. The two most promising ways of achieving this are through developments in implantable devices for monitoring and treating patients outside of clinical settings and through better
point-of-
care diagnostics tools. The first part of this dissertation focuses on the development of a potentially implantable autonomous device for the prevention of late-phase hemorrhagic shock (HS), the leading cause of death for people with traumatic injuries. We demonstrate that such a device can continuously monitor vasopressin levels, an indicator of late-phase HS, and release vasopressin automatically when levels drop below a certain threshold in order to help stabilize the situation. We also discuss the possibility of using a nonenzymatic glucose fuel cell unit, instead of a lithium battery, in order to increase the implantable device's lifetime. Novel power sources are important in the development of low-power long-term implantable devices, and we propose several non-enzymatic fuel cells that can be used as coating layers on current implantable devices or as stand-alone power sources. We show that such glucose fuel cell can produce 16[MICRO SIGN]W cm-3 of power and can be integrated in implantable devices such as the one for preventing late-phase HS. In the second part of the dissertation, we discuss the development of a platform for colorimetric biomarker detection on a smartphone. This platform consists of a smartphone accessory that allows uniform and repeatable image acquisition of a colorimetric test strip and an app that analyzes parameters such as hue, saturation and luminosity of the test area, quantifies the biomarker levels and displays the value on the screen. We demonstrate its use in monitoring electrolyte loss, enamel decalcification, cholesterol and vitamin D. We envision this as the first step toward the development of the NutriPhone, a platform for vitamin and micronutrient testing on a smartphone.
Advisors/Committee Members: Erickson, David (chair), Kan, Edwin Chihchuan (committee member), Abruna, Hector D (committee member).
Subjects/Keywords: point-of-care; smartphone diagnostics; glucose fuel cells
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Oncescu, V. (2014). Development Of Point-Of-Care Devices For Rapid Diagnostics And Preventive Care. (Doctoral Dissertation). Cornell University. Retrieved from http://hdl.handle.net/1813/36188
Chicago Manual of Style (16th Edition):
Oncescu, Vlad-Victor. “Development Of Point-Of-Care Devices For Rapid Diagnostics And Preventive Care.” 2014. Doctoral Dissertation, Cornell University. Accessed February 25, 2021.
http://hdl.handle.net/1813/36188.
MLA Handbook (7th Edition):
Oncescu, Vlad-Victor. “Development Of Point-Of-Care Devices For Rapid Diagnostics And Preventive Care.” 2014. Web. 25 Feb 2021.
Vancouver:
Oncescu V. Development Of Point-Of-Care Devices For Rapid Diagnostics And Preventive Care. [Internet] [Doctoral dissertation]. Cornell University; 2014. [cited 2021 Feb 25].
Available from: http://hdl.handle.net/1813/36188.
Council of Science Editors:
Oncescu V. Development Of Point-Of-Care Devices For Rapid Diagnostics And Preventive Care. [Doctoral Dissertation]. Cornell University; 2014. Available from: http://hdl.handle.net/1813/36188

Vanderbilt University
28.
Lubbers, Brad Ryan.
Nano-Calorimetry for Point of Care Diagnostics.
Degree: PhD, Biomedical Engineering, 2015, Vanderbilt University
URL: http://hdl.handle.net/1803/10713
► Calorimetry has many applications in the physical and life sciences including measuring phase changes, determining reaction equilibria, detecting protein binding events, and quantifying enzyme kinetics.…
(more)
▼ Calorimetry has many applications in the physical and life sciences including measuring phase changes, determining reaction equilibria, detecting protein binding events, and quantifying enzyme kinetics. Towards the goal of creating more sensitive calorimeters, we examined nanowatt scale reactions utilizing commercial IR sensors. With this information, we created heat flow models to aid in the optimization of future device designs. From there, best in class nano-calorimeters with 375 pW/Hz1/2 resolution were fabricated and applied to the need for better
point of
care (POC) assays in the medical field. We developed nanoliter scale thermometric enzyme-linked immunosorbent assay (TELISA) for use in measuring the anti-cancer monoclonal antibody trastuzumab. We measured therapeutic levels of trastuzumab (10-100 µg/ml) in human serum to help enhance clinical outcomes and aid in further drug development. By utilizing standard ELISA reagents this assay can be applied to a broad range of analytes, bringing with it cost, sample, and time savings. In order to better manage metabolic diseases related to the loss of function of key enzymes and transporters in the metabolic pathway, we demonstrated POC detection of phenylalanine down to 5 mM. The incorporation of capillary microfluidic channels into our calorimeter allowed for automatic sample delivery from a finger prick blood draw. With improvement, this could lead to the first POC device for management of Phenylketonuria.
Advisors/Committee Members: Hak-Joon Sung (committee member), Raymond Mernaugh (committee member), Joel Tellinghuisen (committee member), Robert Galloway (committee member), Kevin Currie (committee member), Franz Baudenbacher (Committee Chair).
Subjects/Keywords: microfabrication; Phenylketonuria; trastuzumab; Thermometric ELISA; nano-calorimetry; point of care
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❌
APA ·
Chicago ·
MLA ·
Vancouver ·
CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Lubbers, B. R. (2015). Nano-Calorimetry for Point of Care Diagnostics. (Doctoral Dissertation). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/10713
Chicago Manual of Style (16th Edition):
Lubbers, Brad Ryan. “Nano-Calorimetry for Point of Care Diagnostics.” 2015. Doctoral Dissertation, Vanderbilt University. Accessed February 25, 2021.
http://hdl.handle.net/1803/10713.
MLA Handbook (7th Edition):
Lubbers, Brad Ryan. “Nano-Calorimetry for Point of Care Diagnostics.” 2015. Web. 25 Feb 2021.
Vancouver:
Lubbers BR. Nano-Calorimetry for Point of Care Diagnostics. [Internet] [Doctoral dissertation]. Vanderbilt University; 2015. [cited 2021 Feb 25].
Available from: http://hdl.handle.net/1803/10713.
Council of Science Editors:
Lubbers BR. Nano-Calorimetry for Point of Care Diagnostics. [Doctoral Dissertation]. Vanderbilt University; 2015. Available from: http://hdl.handle.net/1803/10713

Vanderbilt University
29.
Euliano, Erin Marie.
Adaptive Multiplexed RT-PCR Assay for Detection of Chikungunya, Dengue, and Zika Viruses.
Degree: MS, Biomedical Engineering, 2018, Vanderbilt University
URL: http://hdl.handle.net/1803/15382
► As chikungunya, dengue, and Zika virus infections all present similar symptoms, a multiplexed assay could provide enhanced diagnostic power to clinicians at the point-of-care in…
(more)
▼ As chikungunya, dengue, and Zika virus infections all present similar symptoms, a multiplexed assay could provide enhanced diagnostic power to clinicians at the
point-of-
care in low-resource settings: a patient with these symptoms could undergo one test instead of three. This thesis describes the improvement of Adaptive PCR through addition of both a reverse transcription step and multiplexing capability, as well as the development of a multiplexed RT-PCR reaction for simultaneous detection of chikungunya, dengue, and Zika viruses. To implement the reverse transcription step, we selected a molecular beacon sequence to have the greatest slope in intensity vs. temperature at the range best for reverse transcription (45-60°C). The current Adaptive PCR LabVIEW system was programmed to fluorescently detect the correct temperature range and hold the system’s temperature as near to that
point as possible. Primers and probes were optimized for each of the viral RNA genomes to specifically detect only one of the three similar viruses. A different fluorophore was conjugated to each of the probes to allow detection on different channels. The multiplexed assay gave a limit of detection of 5 RNA copies/reaction for Zika and chikungunya and 50 RNA copies/reaction for dengue, all of which are at or just above the average clinical viral load of patients and therefore extremely useful in diagnosis. In addition, none of the negative controls amplified, showing high sensitivity and specificity. Portable multiplexed Adaptive RT-PCR will promote proper diagnoses of chikungunya, dengue, and Zika viruses at the
point-of-
care, allowing for proper treatment.
Advisors/Committee Members: Nicholas Adams, Ph.D. (committee member), Frederick Haselton, Ph.D. (Committee Chair).
Subjects/Keywords: Adaptive PCR; RT-PCR; Zika; dengue; chikungunya; point-of-care diagnostics
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APA ·
Chicago ·
MLA ·
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CSE |
Export
to Zotero / EndNote / Reference
Manager
APA (6th Edition):
Euliano, E. M. (2018). Adaptive Multiplexed RT-PCR Assay for Detection of Chikungunya, Dengue, and Zika Viruses. (Thesis). Vanderbilt University. Retrieved from http://hdl.handle.net/1803/15382
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Chicago Manual of Style (16th Edition):
Euliano, Erin Marie. “Adaptive Multiplexed RT-PCR Assay for Detection of Chikungunya, Dengue, and Zika Viruses.” 2018. Thesis, Vanderbilt University. Accessed February 25, 2021.
http://hdl.handle.net/1803/15382.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
MLA Handbook (7th Edition):
Euliano, Erin Marie. “Adaptive Multiplexed RT-PCR Assay for Detection of Chikungunya, Dengue, and Zika Viruses.” 2018. Web. 25 Feb 2021.
Vancouver:
Euliano EM. Adaptive Multiplexed RT-PCR Assay for Detection of Chikungunya, Dengue, and Zika Viruses. [Internet] [Thesis]. Vanderbilt University; 2018. [cited 2021 Feb 25].
Available from: http://hdl.handle.net/1803/15382.
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation
Council of Science Editors:
Euliano EM. Adaptive Multiplexed RT-PCR Assay for Detection of Chikungunya, Dengue, and Zika Viruses. [Thesis]. Vanderbilt University; 2018. Available from: http://hdl.handle.net/1803/15382
Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

McMaster University
30.
Fung, Barnabas.
A STUDY OF POROUS ELECTRODES FOR DNA ELECTROCHEMICAL DETECTION AND THE DEVELOPMENT OF A HYBRIDIZATION EFFICIENCY CHARACTERIZATION TECHNIQUE.
Degree: MASc, 2016, McMaster University
URL: http://hdl.handle.net/11375/19496
► Point-of-care DNA diagnostics for resource-limited settings require high sensitivity and low limits of detection but is constrained by a limitation on the complexity of instrumentation…
(more)
▼ Point-of-care DNA diagnostics for resource-limited settings require high sensitivity and low limits of detection but is constrained by a limitation on the complexity of instrumentation and resource consumption. To assist in the research and development of such technology, rapid-prototyping offers quick turnaround times from ideation to proof-of-concept testing at reduced costs.
All-solution processed electrodes which exhibit micro/nano-scale wrinkling and porosity were rapidly-prototyped. Probe density was shown to be tunable with these electrodes and densities were greater than planar electrodes due to a surface area enhancement. Such electrodes also demonstrated favorable characteristics for the electrocatalytic detection of DNA hybridization.
Characterization of hybridization efficiency for DNA biosensors often require the determination of probe and target DNA densities in separate experiments, relying on averaged measurements which lose device specificity. A new method to quantify hybridization efficiency was developed which allows the label-free, sequential determination of probe DNA and target DNA density in one experiment, allowing electrode-specific characterization of hybridization efficiency.
Thesis
Master of Applied Science (MASc)
Advisors/Committee Members: Soleymani, Leyla, Engineering Physics.
Subjects/Keywords: Biosensors; Electrochemical; DNA; rapid-prototyping; point-of-care
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Manager
APA (6th Edition):
Fung, B. (2016). A STUDY OF POROUS ELECTRODES FOR DNA ELECTROCHEMICAL DETECTION AND THE DEVELOPMENT OF A HYBRIDIZATION EFFICIENCY CHARACTERIZATION TECHNIQUE. (Masters Thesis). McMaster University. Retrieved from http://hdl.handle.net/11375/19496
Chicago Manual of Style (16th Edition):
Fung, Barnabas. “A STUDY OF POROUS ELECTRODES FOR DNA ELECTROCHEMICAL DETECTION AND THE DEVELOPMENT OF A HYBRIDIZATION EFFICIENCY CHARACTERIZATION TECHNIQUE.” 2016. Masters Thesis, McMaster University. Accessed February 25, 2021.
http://hdl.handle.net/11375/19496.
MLA Handbook (7th Edition):
Fung, Barnabas. “A STUDY OF POROUS ELECTRODES FOR DNA ELECTROCHEMICAL DETECTION AND THE DEVELOPMENT OF A HYBRIDIZATION EFFICIENCY CHARACTERIZATION TECHNIQUE.” 2016. Web. 25 Feb 2021.
Vancouver:
Fung B. A STUDY OF POROUS ELECTRODES FOR DNA ELECTROCHEMICAL DETECTION AND THE DEVELOPMENT OF A HYBRIDIZATION EFFICIENCY CHARACTERIZATION TECHNIQUE. [Internet] [Masters thesis]. McMaster University; 2016. [cited 2021 Feb 25].
Available from: http://hdl.handle.net/11375/19496.
Council of Science Editors:
Fung B. A STUDY OF POROUS ELECTRODES FOR DNA ELECTROCHEMICAL DETECTION AND THE DEVELOPMENT OF A HYBRIDIZATION EFFICIENCY CHARACTERIZATION TECHNIQUE. [Masters Thesis]. McMaster University; 2016. Available from: http://hdl.handle.net/11375/19496
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