Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

Sorted by: relevance · author · university · dateNew search

You searched for subject:(ultrasonically activated scalpel). Showing records 1 – 2 of 2 total matches.

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters


Virginia Tech

1. Duesterdieck, Katja Friederike. Evaluation of the Harmonic Scalpel for Laparoscopic Bilateral Ovariectomy in Standing Horses.

Degree: MS, Veterinary Medical Sciences, 2003, Virginia Tech

Objective - To evaluate a surgical technique for performing laparoscopic bilateral ovariectomy in standing horses. Study Design - Experimental study. Animals or Sample population - 8 mares, age 2-20 years, weight 410-540 kg. Methods - Standing laparoscopic bilateral ovariectomy was performed in 8 mares with normal anatomy of the reproductive tract. The Harmonic Scalpel (an ultrasonically activated instrument) was used to transect the ovarian pedicle and to obtain hemostasis simultaneously. Necropsy was performed on 4 mares 3 days after surgery and 30 days following surgery on the remaining 4 mares. Gross and histopathologic evaluation of the ovarian pedicles was performed to characterize the effects of the Harmonic Scalpel on the transected tissue. Results - The Harmonic Scalpel achieved complete hemostasis of the vasculature of the ovarian pedicles in all mares. Median transection time for the ovarian pedicle was 28 minutes. Postoperative complications included transient fever in one mare, moderate subcutaneous emphysema in another, and incisional seroma formation in a third mare. Post-mortem examination 3 and 30 days postoperatively revealed no signs of generalized peritonitis, postoperative hemorrhage or adhesion formation. Mild to moderate acute inflammation, and scar formation with moderate chronic inflammation at the ovarian pedicle was found 3 and 30 days after surgery, respectively. Median depth of coagulation necrosis 3 days postoperatively was 2.87 mm. Conclusions - The Harmonic Scalpel appears to provide reliable hemostasis of the ovarian pedicle during elective laparoscopic ovariectomy in horses. Clinical Relevance - The Harmonic Scalpel represents a safe alternative to other means of hemostasis during elective laparoscopic ovariectomy in horses. Advisors/Committee Members: Pleasant, Robert Scott (committeechair), Howard, Rick Dale (committee member), Saunders, Geoffrey K. (committee member), Lanz, Otto I. (committee member).

Subjects/Keywords: ultrasonically activated scalpel; ovariectomy; equine; laparoscopy

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Duesterdieck, K. F. (2003). Evaluation of the Harmonic Scalpel for Laparoscopic Bilateral Ovariectomy in Standing Horses. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/32943

Chicago Manual of Style (16th Edition):

Duesterdieck, Katja Friederike. “Evaluation of the Harmonic Scalpel for Laparoscopic Bilateral Ovariectomy in Standing Horses.” 2003. Masters Thesis, Virginia Tech. Accessed September 27, 2020. http://hdl.handle.net/10919/32943.

MLA Handbook (7th Edition):

Duesterdieck, Katja Friederike. “Evaluation of the Harmonic Scalpel for Laparoscopic Bilateral Ovariectomy in Standing Horses.” 2003. Web. 27 Sep 2020.

Vancouver:

Duesterdieck KF. Evaluation of the Harmonic Scalpel for Laparoscopic Bilateral Ovariectomy in Standing Horses. [Internet] [Masters thesis]. Virginia Tech; 2003. [cited 2020 Sep 27]. Available from: http://hdl.handle.net/10919/32943.

Council of Science Editors:

Duesterdieck KF. Evaluation of the Harmonic Scalpel for Laparoscopic Bilateral Ovariectomy in Standing Horses. [Masters Thesis]. Virginia Tech; 2003. Available from: http://hdl.handle.net/10919/32943


University of Western Ontario

2. Khalaji, Iman. On the Application of Mechanical Vibration in Robotics-Assisted Soft Tissue Intervention.

Degree: 2014, University of Western Ontario

Mechanical vibration as a way of transmitting energy has been an interesting subject to study. While cyclic oscillation is usually associated with fatigue effect, and hence a detrimental factor in failure of structures and machineries, by controlled transmission of vibration, energy can be transferred from the source to the target. In this thesis, the application of such mechanical vibration in a few surgical procedures is demonstrated. Three challenges associated with lung cancer diagnosis and treatment are chosen for this purpose, namely, Motion Compensation, tumor targeting in lung Needle Insertion and Soft Tissue Dissection: A robotic solution is proposed for compensating for the undesirable oscillatory motion of soft tissue (caused by heart beat and respiration) during needle insertion in the lung. An impedance control strategy based on a mechanical vibratory system is implemented to minimize the tissue deformation during needle insertion. A prototype was built to evaluate the proposed approach using: 1) two Mitsubishi PA10-7C robots, one for manipulating the macro part and the other for mimicking the tissue motion, 2) one motorized linear stage to handle the micro part, and 3) a Phantom Omni haptic device for remote manipulation. Experimental results are given to demonstrate the performance of the motion compensation system. A vibration-assisted needle insertion technique has been proposed in order to reduce needle–tissue friction. The LuGre friction model is employed as a basis for the study and the model is extended and analyzed to include the impact of high-frequency vibration on translational friction. Experiments are conducted to evaluate the role of insertion speed as well as vibration frequency on frictional effects. In the experiments conducted, an 18 GA brachytherapy needle was vibrated and inserted into an ex-vivo soft tissue sample using a pair of amplified piezoelectric actuators. Analysis demonstrates that the translational friction can be reduced by introducing a vibratory low-amplitude motion onto a regular insertion profile, which is usually performed at a constant rate. A robotics-assisted articulating ultrasonic surgical scalpel for minimally invasive soft tissue cutting and coagulation is designed and developed. For this purpose, the optimal design of a Langevin transducer with stepped horn profile is presented for internal-body applications. The modeling, optimization and design of the ultrasonic scalpel are performed through equivalent circuit theory and verified by finite element analysis. Moreover, a novel surgical wrist, compatible with the da Vinci® surgical system, with decoupled two degrees-of-freedom (DOFs) is developed that eliminates the strain of pulling cables and electrical wires. The developed instrument is then driven using the dVRK (da Vinci® research kit) and the Classic da Vinci® surgical system.

Subjects/Keywords: Lung cancer; Mechanical vibration; Robotics-assisted minimally invasive surgery; Motion compensation; Impedance control; Needle insertion; Ultrasonically activated scalpel; Non-uniform Rational B-spline (NURBS); Optimization; Finite element analysis; Biomechanical Engineering; Biomedical Devices and Instrumentation; Electro-Mechanical Systems

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Khalaji, I. (2014). On the Application of Mechanical Vibration in Robotics-Assisted Soft Tissue Intervention. (Thesis). University of Western Ontario. Retrieved from https://ir.lib.uwo.ca/etd/2558

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):

Khalaji, Iman. “On the Application of Mechanical Vibration in Robotics-Assisted Soft Tissue Intervention.” 2014. Thesis, University of Western Ontario. Accessed September 27, 2020. https://ir.lib.uwo.ca/etd/2558.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7th Edition):

Khalaji, Iman. “On the Application of Mechanical Vibration in Robotics-Assisted Soft Tissue Intervention.” 2014. Web. 27 Sep 2020.

Vancouver:

Khalaji I. On the Application of Mechanical Vibration in Robotics-Assisted Soft Tissue Intervention. [Internet] [Thesis]. University of Western Ontario; 2014. [cited 2020 Sep 27]. Available from: https://ir.lib.uwo.ca/etd/2558.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Khalaji I. On the Application of Mechanical Vibration in Robotics-Assisted Soft Tissue Intervention. [Thesis]. University of Western Ontario; 2014. Available from: https://ir.lib.uwo.ca/etd/2558

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

.