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You searched for subject:(This doctoral thesis has been focused on the challenge to obtain using Additive Manufacturing AM models for surgical planning under the premise that the equipment to obtain them should be accessible to the hospital field The objective is to spread the use of prototypes as a surgical training tool upgrading medical practice in the same way that technologies which enhanced radiographs at the time The reason for using AM instead of more traditional technologies is its capacity to materialise in a straight way the digital data of the patient anatomy coming from three dimensional scanning systems making it possible to achieve personalised models The results are basically the generation of new knowledge in order to create accessible multi material 3D printing machines that would allow to obtain models mimicking living tissues Related to the will to spread this technology research has focused on open source technologies mainly Fused Filament Fabrication FFF AND similar technologies based on catalitzable liquids This research is aligned with the development work related to AM at CIM UPC AND in this special field there is a close cooperation with Hospital Sant Joan de D u in Barcelona HSJD The first section of the thesis includes a description of the state of the art including the existing technologies AND their application within the medical field For the first time basis have been laid for the characterisation of living tissues primarily soft tissues to support the selection of materials mimicking them in an AM process so as to improve the surgical planning experience The stiffness linked to most of the materials commonly used in 3D printing makes them unhelpful to simulate tumours AND other anatomic references Then parameters like density viscoelasticity soft materials industry characterisation soft tissues AND vessels elastic modulus its hardness mimicking blood AND sterilisation requirements are successively treated The second section starts exploring FFF 3D printing Processes are classified from the point of view of multi materiality a key factor for surgical planning models telling multi nozzle solutions from mixing printheads solutions A study about probable useful materials both filaments AND liquids to mimic soft tissues is included It is stated how liquids compared to filaments are more demanding related to additive manufacturing processes AND different ways to print very soft materials are detailed Finally six real cases in which the doctorate has participated in these last years involving collaboration with HSJD are reported In the origin it can be found the difficulty to perform tumour resection surgeries to children like neuroblastoma type AND the initiative of Dr Lucas Krauel Finally Section 3 is devoted to the exploration of many concepts up to 8 activity performed along the last five years thanks to the technical resources of CIM UPC AND the academic activity of the UPC students related to their final degree thesis therefore reaching the construction of several machines AND mechanisms to test them The wide AND systematic research about these concepts makes closer the day to reach a desktop 3D printing multimaterial solution It is found that the best way to progress is having a plurality of independent printheads in order to enable a 3D printer to integrate some of the researched concepts thus materialising a possible solution To sum up it is raised how a 3D printer for surgical training models should be like for the purpose of serving as a basis for new developments ). One record found.

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Universitat Politècnica de Catalunya

1. Fenollosa Artés, Felip. Contribució a l'estudi de la impressió 3D per a la fabricació de models per facilitar l'assaig d'operacions quirúrgiques de tumors.

Degree: Departament d'Enginyeria Mecànica, 2019, Universitat Politècnica de Catalunya

La presente tesis doctoral se ha centrado en el reto de conseguir, mediante Fabricación Aditiva (FA), modelos para ensayo quirúrgico, bajo la premisa que los equipos para obtenerlos tendrían que ser accesibles al ámbito hospitalario. El objetivo es facilitar la extensión del uso de modelos como herramienta de preparación de operaciones quirúrgicas, transformando la práctica médica actual de la misma manera que, en su momento, lo hicieron tecnologías como las que facilitaron el uso de radiografías. El motivo de utilizar FA, en lugar de tecnologías más tradicionales, es su capacidad de materializar de forma directa los datos digitales obtenidos de la anatomía del paciente mediante sistemas de escaneado tridimensional, haciendo posible la obtención de modelos personalizados. Los resultados se centran en la generación de nuevo conocimiento para conseguir equipamientos de impresión 3D multimateriales accesibles que permitan la obtención de modelos miméticos respecto a los tejidos vivos. Para facilitar la buscada extensión de la tecnología, se ha focalizado en las tecnologías de código abierto como la Fabricación por Hilo Fundido (FFF) y similares basadas en líquidos catalizables. Esta investigación se alinea dentro de la actividad de desarrollo de la FA en el CIM UPC, y en este ámbito concreto con la colaboración con el Hospital Sant Joan de Déu de Barcelona (HSJD). El primer bloque de la tesis incluye la descripción del estado del arte, detallando las tecnologías existentes y su aplicación al entorno médico. Se han establecido por primera vez unas bases de caracterización de los tejidos vivos – principalmente blandos – para dar apoyo a la selección de materiales que los puedan mimetizar en un proceso de FA, a efectos de mejorar la experiencia de ensayo de los cirujanos. El carácter rígido de los materiales mayoritariamente usados en impresión 3D los hace poco útiles para simular tumores y otras referencias anatómicas. De forma sucesiva, se tratan parámetros como la densidad, la viscoelasticidad, la caracterización de materiales blandos en la industria, el estudio del módulo elástico de tejidos blandos y vasos, la dureza de los mismos, y requerimientos como la esterilización de los modelos. El segundo bloque empieza explorando la impresión 3D mediante FFF. Se clasifican las variantes del proceso desde el punto de vista de la multimaterialidad, esencial para hacer modelos de ensayo quirúrgico, diferenciando entre soluciones multiboquilla y de mezcla en el cabezal. Se ha incluido el estudio de materiales (filamentos y líquidos) que serían más útiles para mimetizar tejidos blandos. Se constata como en los líquidos, en comparación con los filamentos, la complejidad del trabajo en procesos de FA es más elevada, y se determinan formas de imprimir materiales muy blandos. Para acabar, se exponen seis casos reales de colaboración con el HJSD, una selección de aquellos en los que el doctorando ha intervenido en los últimos años. El origen se encuentra en la dificultad del abordaje de operaciones… Advisors/Committee Members: [email protected] (authoremail), false (authoremailshow), Buj Corral, Irene (director), Gomà Ayats, Joan Ramon (director).

Subjects/Keywords: This doctoral thesis has been focused on the challenge to obtain, using Additive Manufacturing (AM), models for surgical planning, under the premise that the equipment to obtain them should be accessible to the hospital field. The objective is to spread the use of prototypes as a surgical training tool, upgrading medical practice in the same way that technologies which enhanced radiographs at the time. The reason for using AM, instead of more traditional technologies, is its capacity to materialise, in a straight way, the digital data of the patient anatomy coming from three-dimensional scanning systems, making it possible to achieve personalised models. The results are basically the generation of new knowledge in order to create accessible multi-material 3D printing machines that would allow to obtain models mimicking living tissues. Related to the will to spread this technology, research has focused on open source technologies, mainly Fused Filament Fabrication (FFF), and similar technologies based on catalitzable liquids. This research is aligned with the development work related to AM at CIM UPC, and in this special field there is a close cooperation with Hospital Sant Joan de Déu in Barcelona (HSJD). The first section of the thesis includes a description of the state of the art, including the existing technologies and their application within the medical field. For the first time, basis have been laid for the characterisation of living tissues – primarily soft tissues – to support the selection of materials mimicking them in an AM process, so as to improve the surgical planning experience. The stiffness linked to most of the materials commonly used in 3D printing, makes them unhelpful to simulate tumours and other anatomic references. Then, parameters like density, viscoelasticity, soft materials industry characterisation, soft tissues and vessels elastic modulus, its hardness, mimicking blood and sterilisation requirements, are successively treated. The second section starts exploring FFF 3D printing. Processes are classified from the point of view of multi-materiality, a key factor for surgical planning models, telling multi-nozzle solutions from mixing printheads solutions. A study about probable useful materials (both filaments and liquids) to mimic soft tissues is included. It is stated how liquids, compared to filaments, are more demanding related to additive manufacturing processes, and different ways to print very soft materials are detailed. Finally, six real cases – in which the doctorate has participated in these last years –, involving collaboration with HSJD, are reported. In the origin it can be found the difficulty to perform tumour resection surgeries to children, like neuroblastoma type, and the initiative of Dr. Lucas Krauel. Finally, Section 3 is devoted to the exploration of many concepts (up to 8), activity performed along the last five years thanks to the technical resources of CIM UPC and the academic activity of the UPC students, related to their final degree thesis, therefore reaching the construction of several machines and mechanisms to test them. The wide and systematic research about these concepts makes closer the day to reach a desktop 3D printing multimaterial solution. It is found that the best way to progress is having a plurality of independent printheads in order to enable a 3D printer to integrate some of the researched concepts, thus materialising a possible solution. To sum up, it is raised how a 3D printer for surgical training models should be like, for the purpose of serving as a basis for new developments.; Àrees temàtiques de la UPC::Enginyeria mecànica; 617; 620; 68

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APA (6th Edition):

Fenollosa Artés, F. (2019). Contribució a l'estudi de la impressió 3D per a la fabricació de models per facilitar l'assaig d'operacions quirúrgiques de tumors. (Thesis). Universitat Politècnica de Catalunya. Retrieved from http://hdl.handle.net/10803/667421

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):

Fenollosa Artés, Felip. “Contribució a l'estudi de la impressió 3D per a la fabricació de models per facilitar l'assaig d'operacions quirúrgiques de tumors.” 2019. Thesis, Universitat Politècnica de Catalunya. Accessed January 20, 2021. http://hdl.handle.net/10803/667421.

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

MLA Handbook (7th Edition):

Fenollosa Artés, Felip. “Contribució a l'estudi de la impressió 3D per a la fabricació de models per facilitar l'assaig d'operacions quirúrgiques de tumors.” 2019. Web. 20 Jan 2021.

Vancouver:

Fenollosa Artés F. Contribució a l'estudi de la impressió 3D per a la fabricació de models per facilitar l'assaig d'operacions quirúrgiques de tumors. [Internet] [Thesis]. Universitat Politècnica de Catalunya; 2019. [cited 2021 Jan 20]. Available from: http://hdl.handle.net/10803/667421.

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

Council of Science Editors:

Fenollosa Artés F. Contribució a l'estudi de la impressió 3D per a la fabricació de models per facilitar l'assaig d'operacions quirúrgiques de tumors. [Thesis]. Universitat Politècnica de Catalunya; 2019. Available from: http://hdl.handle.net/10803/667421

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

.