Dissertations / Theses on the topic 'Chirurgie endoscopique'
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Caillaud, Philippe. "La ventriculoscopie : réalités et perspectives d'une méthode, à propos de 51 observations." Bordeaux 2, 1994. http://www.theses.fr/1994BOR23067.
Full textTailland, Marie-Laure Durand. "Chirurgie endoscopique gynécologique : expérience en 1987." Montpellier 1, 1988. http://www.theses.fr/1988MON11302.
Full textGeorgel, Thomas Jankowski Roger. "Chirurgie endoscopique transnasale de l'adénocarcinome des travailleurs du bois." [S.l.] : [s.n.], 2007. http://www.scd.uhp-nancy.fr/docnum/SCDMED_T_2007_GEORGEL_THOMAS.pdf.
Full textPujol, Sonia Marie Aurore. "Chirurgie endovasculaire assistée par ordinateur." Université Joseph Fourier (Grenoble), 2003. http://www.theses.fr/2003GRE19019.
Full textThis thesis concerns the conception and development of a computer-assisted navigation sys- tem for endovascular surgery. The clinical application is the treatment of abdominal aortic aneu- rysm. The objective is real-time tracking, in pre-operative CT images, of the position of an aortic endoprosthesis inserted in the femoral artery. This research deals with the deưnition of relevant data from imaging and localization systems, as well as their processing and registra- tion for a minimally invasive navigation. The arterial tree is located in the Operating Room reference system through freehand ultrasound. An original 2D/3D registration method, based on prior knowledge, provides the transformation to register ultrasound images and pre-operative CT volume. The magnetic sensors' integration within the vascular guide allows a non invasive localization of the endoprosthesis inside the patient's aorta. Fusion of images and localization data permits real-time calculation of anatomical CT slices that correspond to the position of endovascular elements. The navigation system oers thus a non-radiative 3D visualization of the endoprosthesis. This thesis comprises several domains of computer assisted surgery : CT and ultrasound registration, calibration of magnetic and optical localization systems, calibration of a freehand ultrasound probe, and the conception of tools for a minimally invasive intervention. Preclinical validation on an anatomical piece has demonstrated an accuracy compatible with the objectives of endovascular surgery. Clinical tests on patients are underway
Elhage, Abdou. "Apport de l'experimentation animale a l'evaluation de la chirurgie endoscopique." Lille 2, 1996. http://www.theses.fr/1996LIL2T002.
Full textOtt, Laurent. "Compensation des mouvements physiologiques en endoscopie flexible : application à la chirurgie transluminale." Strasbourg, 2009. http://www.theses.fr/2009STRA6233.
Full textTransluminal surgery, also called NOTES (Natural Orifice Transluminal Endoscopic Surgery), consists of accessing the peritoneal cavity by passing through a natural orifice and then to make an opening in an inner wall to accomplish treatments. Conventional flexible endoscopes used nowadays to perform these procedures have a distal bending tip controlled by two navigation wheels located on the handle. They also provide a visual feedback from an optical system (CCD camera) embedded at the tip of the endoscope. These tools are quite awkward for the surgeons as the control interface is non intuitive and the visibility is poor. In order to supply a robotic assistance to the praticians during flexible endoscopy interventions, we have developed an automated positioning system of the endoscope tip. The objective is to realize a virtual link between the tip of the endoscope and an anatomical target despite the physiological motions, the interaction of the instruments with the environment and the manually controlled forward/backward motion of the endoscope. The pratician can thereby focus on the manipulation of the endoscopic tools while the bending section compensate the occurring disturbances. The virtual link between the tip and the anatomical target is performed using a 2D visual servoing scheme in association with the selection of relevant visual features
Lundy, Sylvie. "Cathétérisme des voies biliaires et sphinctérotomie endoscopique : expérience montoise sur 6 ans." Bordeaux 2, 1993. http://www.theses.fr/1993BOR2M127.
Full textNguyen-Duy, Phuong. "Résultats de l'ethmoi͏̈dectomie par voie endonasale dans le traitement de la polypose naso-sinusiennes : à propos de 40 cas." Montpellier 1, 1993. http://www.theses.fr/1993MON11104.
Full textGuérin, Hélène. "Les complications de la sphinctérotomie endoscopique." Montpellier 1, 1990. http://www.theses.fr/1990MON11197.
Full textVadier, François. "La chirurgie rachidienne par thoracoscopie : résultats préliminaires à propos de 29 cas et comparaison avec une série de 20 thoracotomies." Bordeaux 2, 1997. http://www.theses.fr/1997BOR23032.
Full textCastillo, Laurent. "Iatrogenie et complications de la chirurgie sinusienne endonasale per-endoscopique : prevention, reparation." Nice, 1991. http://www.theses.fr/1991NICE6841.
Full textJean-Marie, Jean-Pierre. "La sclérose endoscopique des varices œsophagiennes : expérience au centre hospitalier régional et universitaire de Fort de France de 1985 à 1990." Bordeaux 2, 1996. http://www.theses.fr/1996BOR2M014.
Full textCanis, Michel. "Pathologie tumorale de l'ovaire et coelioscopie (doctorat : medecine)." Clermont-Ferrand 1, 1999. http://www.theses.fr/1999CLF1MM13.
Full textBouquet, de Jolinière Jean. "Réflexions éthique et déontologique de l'image active en chirurgie endoscopique : utilisations et réseaux." Paris 5, 1999. http://www.theses.fr/1999PA05N004.
Full textLyvan, Kévin. "Etude de matériaux élastiques définis par des barres : application à la simulation en chirurgie endoscopique." Toulouse 3, 2003. http://www.theses.fr/2003TOU30117.
Full textThis thesis develops an approach by rods lattice of linear and non linear continuum elastic media model. We apply results to the live tissues modelling in an objective to build an endoscopic surgery simulator. In a first chapter we have studied a rod structure link by hinges under small deformation hypothesis. When the web is composed by periodic cells, we have applied results from homogenisation methods to establish the convergence of the model when the cells diameter tends to 0. If hinges are inert we have shown that the limit material's Poisson ratio is constant and equal to 1/4 for any mesh. In a second chapter, we have considered a hyper elastic media like Ogden material. We have established that the P1- finite element approach is equivalent to a certain hyper elastic rods structures energy minimization problem and we have shown a convergence result for certain types of periodical web. This study is completed by an analysis of different mathematical methods to approach a hyper elastic material by periodic rods structure composed by a non-conform mesh. This approach is applied for the live tissue modelling. .
Ozaki, Mondo. "Dix ans de chirurgie surrénalienne." Bordeaux 2, 2000. http://www.theses.fr/2000BOR23079.
Full textJacques, Jérémie. "Utilisation du modèle animal pour la formation et la recherche en endoscopie interventionnelle : exemple de la dissection sous-muqueuse endoscopique." Thesis, Limoges, 2020. http://www.theses.fr/2020LIMO0032.
Full textEndoscopic submucosal dissection has become the gold-standard technique for the treatment of superficial tumors of the gastrointestinal tract. However, it requires a high level of technical skill and a level of training that is difficult to apply outside Japan. The development and use of animal models have allowed our team to train in ESD, to improve the device and strategies allowing a democratization of the technique initially limited to rare expert centers.This strategy can be extrapolated to many new endoscopic procedures where the dexterity required is inversely proportional to recruitment and the supervisors and industrialists will have to integrate the importance of these animal research and training structures in their support of academic institution in digestive endoscopy
Moi͏̈tsinga, Edgar. "Traitement palliatif par endoprothèse endoscopique des ictères par obstacle biliaire, à propos de 68 patients." Bordeaux 2, 1996. http://www.theses.fr/1996BOR23081.
Full textVanbiervliet, Geoffroy. "Validation clinique et métabolique de l'approche endoscopique par notes de la chirurgie bariatrique sur modèle porcin vivant." Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM5073.
Full textIntroduction - The aim of this study was to develop an endoscopic experimental model of NOTES bariatric surgery using a simple, reproducible technique and to validate it both clinically (feasibility, tolerance) and metabolically (pathophysiology and action plan). Materials and Methods - The studies were conducted within the CERC and INSERM UMRS 1260 unit. The animal was the pig, aged 3 to 4 months, healthy and not obese. Endoscopies were performed using a dual channel gastroscope operator and the endoscopy equipment currently available. Several development stages were set up from the development of an animal model of gastrointestinal anastomosis using an exclusive endoscopic NOTES procedure to the evaluation of the metabolic impact of gastric bypass bariatric model described using the gastrointestinal anastomosis by luminal apposing stent technique. Results - The gastro-jejunal anastomosis model chosen for its feasibility and safety was developed by luminal apposing gastric and small bowel digestive lumens with a specific metallic covered stent and NOTES technique. The experimental evaluation of the metabolic gastric bypass using this procedure allowed to observe a significant improvement in insulin resistance none mediated by GLP-1 and incretin effect. Conclusion - The concept of anastomosis with luminal apposing stent and exclusive NOTES technique is established and endoscopic bypass model using this procedure is feasible pretend to present a significant metabolic impact
Marty-Ané, Charles-Henri. "Nouvelle approche thérapeutique de la dissection aortique par les techniques endovasculaires." Montpellier 1, 1995. http://www.theses.fr/1995MON1T004.
Full textChaume, Vincent. "Indications et complications de la cholangio-pancréatographie rétrograde endoscopique : expérience de service de Médecine interne gérontologique de Nîmes comparée aux résultats de la littérature." Montpellier 1, 1997. http://www.theses.fr/1997MON11048.
Full textHaimad, Khadija. "Le devenir des microlithiases vésiculaires et des vésicules biliaires saines après sphinctèrotomie endoscopique." Saint-Etienne, 1994. http://www.theses.fr/1994STET6202.
Full textDray, Xavier. "Evaluation et optimisation des techniques d'abord transgastrique de la cavité péritonéale en chirurgie endoscopique transluminale par les orifices naturels (natural orifice translumenal endoscopic surgery, notes)." Paris, CNAM, 2009. http://www.theses.fr/2009CNAM0672.
Full textLa NOTES (Natural Orifice Translumenal Endoscopic Surgery) est une technique chirurgicale qui consiste à aborder la cavité péritonéale à l’aide d’un endoscope souple, à travers les orifices naturels puis à travers la paroi du tube digestif ou des voies uro-génitales. La maîtrise d’un abord per-oral et transgastrique (disponible pour les deux sexes, par opposition à l’abord transvaginal) est un objectif hautement souhaitable pour le développement de cette technique. Les travaux présentés dans cette thèse démontrent la faisabilité d’interventions endoscopiques souples par voie transgastrique sur modèle porcin vivant. Ils mettent en évidence : (1) l’intérêt de protocoles anti-infectieux avant une NOTES transgastrique ; (2) la nécessité de réaliser un pneumopéritoine avant création d’un abord transgastrique pour prévenir la survenue de plaies d’organes de voisinage; (3) la meilleure tolérance d’une dilatation au ballon plutôt que d’une incision au sphinctérotome lors de la création de la voie d’abord transgastrique ; (4) la possibilité d’introduire de façon stérile par voie transgastrique du matériel prothétique pour un usage intrapéritonéal (telle qu’illustrée par une technique de cure d’éventration ombilicale par NOTES transgastrique) ; (5) le caractère encore imparfait et hautement dépendant des avancées technologiques des méthodes endoscopiques de création (par exemple à l’aide d’un laser de 2 µm de longueur d’onde) et de fermeture (par exemple par clips, points en T, agrafes) de la voie d’abord transgastrique ; et (6) la faisabilité de tests d’étanchéité mini-invasifs et hautement spécifiques (utilisant par exemple de l’hydrogène dilué)
Bardou, Bérengère. "Développement et étude d'un système robotisé pour l'assistance à la chirurgie transluminale." Strasbourg, 2011. http://www.theses.fr/2011STRA6162.
Full textFlexible endoscopes have been recently used for new surgical procedures through natural orifices and without visible scars. However, the movements of conventional flexible endoscopes are limited and surgeons can only perform basic tasks with these systems. In order to increase the number of degrees of freedom and the workspace, we propose a new device which is made up of a classical endoscope basis with two additional arms. Given the high number of degrees of freedom, the manipulation of the system is difficult. The robotization of such a device is a solution to make its manipulation more intuitive. The main objective is to propose a teleoperated system where the final motion is a combination of several basic movements computed from the kinematic models. But the presence of important backlash induced by the cable transmission raises many difficulties wh en robotizing and controlling su ch systems. Because of these strong non linearities, controlling the instrument position with only the kinematic model proved to be inaccurate and difficult. At first, the addition of an external sensor for closing the control loop allows improving control but is not sufficient. The association with a software compensation method has given encouraging results and improved the system behavior
Albitar, Chadif. "Reconstruction 3D par vision active codée : application à la vision endoscopique." Strasbourg, 2009. http://www.theses.fr/2009STRA6018.
Full textThe aim of this work is to develop a rigid endoscopic tool which can provide real-time 3D reconstruction using a structured light projection. To this end, we designed a new monochromatic pattern to which a code based on the spatial neighborhood strategy and the theory of M-array’s using 3 symbols was associated. In addition, a directional primitive was considered. The originality of this pattern is also in the robustness of its code characterized by a mean Hamming distance greater than 6. The proposed processing algorithms were validated. The average error was less than 1 mm for position and 1° for the orientation in a workspace of depth from 600 to 800 mm. Diffractive optical elements were used for the implementation of the tool. The green color was chosen to illuminate the pattern. The tests in-vivo on the internal surfaces of a pig abdomen have shown promising results
Sicart-Prieu, Marie-Christine. "Evaluation du risque de transmission de l'infection virale C par les pinces à biopsie au cours d'endoscopie digestive." Montpellier 1, 1995. http://www.theses.fr/1995MON11177.
Full textMaurice, Xavier. "Lumière structurée codée pour une reconstruction 3-D robuste : Application à la chirurgie mini-invasive." Strasbourg, 2011. https://publication-theses.unistra.fr/public/theses_doctorat/2011/MAURICE_Xavier_2011.pdf.
Full textDuring a minimally-invasive surgical intervention, the intra-abdominal scene, which is acquired by an endoscope, is presented to the surgeon by means of a 2-D display. The real-time depth map computation of such a scene could have huge benefits like a better visual perception, robot visual servoing, registration of pre-existing models of organs. To this end, in this thesis, many contributions leading to the realisation of an endoscopic stereo, mono-trocar, system, based on a coded structured light pattern projection, are presented. We propose to better exploit the epipolar geometry of the system at the pattern design step, first for the numerical coding, and then, for the pattern layout. Other contributions dealing with "brute-force" coding algorithm with redundancy, with real-time GPU processing, with 3-D reconstruction and with weak-calibration of the system, are described. In particular, the two main issues in "brute-force" coding algorithms : the search behaviour and the unicity test, are addressed. Moreover, an a priori compensation of optical distorsions of the projector is proposed after the pattern alignment on the epipolar geometry. Numerous coding results, ex vivo and in vivo 3-D reconstruction with associated statistics, are reported to evaluate the proposed approach
François, Jean-Marc. "Méat moyen nasal de l'enfant : étude anatomique tomodensitométrique et endoscopique et applications chirurgicales." Bordeaux 2, 1994. http://www.theses.fr/1994BOR23055.
Full textBernez, Jean. "Plastie du ligament croisé antérieur renforcée sous contrôle endoscopique (Technique de Th. D. Rosenberg modifiée), à propos d'une étude prospective de 25 cas avec 2 ans de recul." Bordeaux 2, 1996. http://www.theses.fr/1996BOR23055.
Full textBastin, Mathieu. "Influence de la technique opératoire sur le coût du traitement chirurgical des syndromes du canal carpien." Bordeaux 2, 2001. http://www.theses.fr/2001BOR2M063.
Full textSibille, Patrick. "Complications de la micro-chirurgie endonasale : expérience bordelaise, à propos de 249 cas." Bordeaux 2, 1993. http://www.theses.fr/1993BOR2M091.
Full textGreib, Nicolas. "Administration par voie péritonéale de médicaments au cours de la coeliochirurgie : intérêt de la nébulisation d'anesthésique local." Strasbourg, 2010. http://www.theses.fr/2010STRA6174.
Full textThe boom in laparoscopic surgery means that new anesthetic strategies must be found, especially with respect to post-operative analgesia. Topical administration of local anesthetics is part of multimodal analgesia and many studies seeking to establish its interest in laparoscopic surgery provide contradictory results. Our aim is to contribute to an optimum way of administrating local anesthetics topically, with a view to: 1)homogeneous spreading on the peritoneum, 2)simultaneous humidification of insufflation gas, in order to prevent hypothermia. Hypothermia is due to evaporation of the peritoneum’s surface by contact with dry insufflation gas. Humidification could prevent this thermal energy loss. We performed several in vitro and in vivo (animal-) studies. Firstly, we evaluated the efficiency of hot versus cold humidification in hypothermia prevention. Secondly, we evaluated several humidification devices in order to assess their efficiency in delivering ropivacaine in the insufflation gas flow. Finally, we performed a pharmacokinetic study of intraperitoneal ropivacaine nebulization, by comparison with standard instillation. Our results open new prospects for intraperitoneal topical administration of local anesthetics: in the animal setting, we showed that hot humidification of insufflated gas did not provide any benefit in hypothermia prevention, in comparison with cold humidification, we established the potential value of a nebulizer, able to humidify and deliver local anesthetics along with CO2 insufflation during laparoscopy, we performed the first pharmacokinetic study of intraperitoneal ropivacaine nebulization, validating the safety of the technique. These results enable us to follow our research with a clinical trial to evaluate the effects of nebulized ropivacaïne and humidified insufflation gas in laparoscopic surgery
Pavy, Sébastien. "La varicocèle : traitement endovasculaire par sclérothérapie, étude rétrospective sur une série de 75 patients." Bordeaux 2, 1998. http://www.theses.fr/1998BOR23002.
Full textHamon, Isabelle. "A quels malades faut-il proposer une gastrostomie percutanée endoscopique ? : Etude prospective chez la personne âgée." Bordeaux 2, 2000. http://www.theses.fr/2000BOR2M066.
Full textRobin, Philippe. "Les formes severes du stridor larynge congenital essentiel (s. L. C. E. ) : a propos de 51 cas traites par chirurgie endoscopique ; la supra-glottoplastie." Lyon 1, 1992. http://www.theses.fr/1992LYO1M235.
Full textAcosta-Tamayo, Oscar Dario. "De la navigation exploratoire virtuelle à la planification d'interventions endovasculaires." Rennes 1, 2004. https://tel.archives-ouvertes.fr/tel-00007555v2.
Full textGonzalez, Jean-Michel. "Validation métabolique d'un modèle animal de by-pass endoscopique exclusif par une étude comparative sur modèle porcin obèse de type Yucatan, et développement des technologies permettant l'application humaine." Thesis, Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0667.
Full textIntroduction - Bariatric surgery, despite its effectiveness, remains morbid. Digestive endoscopy has developed bariatric techniques. The realization of an endoscopic by-pass (EBP) is our research topic. We present its metabolic and technical results for a transition to humans. Materials and methods - The studies were conducted at the CERC from 2012 to 2019. The initial phase resulted in an experimental AGJ model by lumen apposing stent (Axios® stents) with metabolic evaluation on normal minipig and the first humans’ cases. In the 2nd part, the metabolic validation was performed on 24 obese Yucatan minipigs with 4 groups: gastro-jejunal anastomosis (GJA) alone, full BPE, surgical bypass, and sham procedure. The equipment improvements included: the apposing stent, endoscopic pyloric closure, grasping and selection of the bypassed limb. Results - Material: We have improved or acheuved: i) the reliability of the anastomosis by modifying the stent (bi-concave shape); ii) the pyloric closure by creating a central "twist" of the Axios® stent; iii) the grasping of the limb by creating a dedicated atraumatic forceps; iv) its selection at 150cm from the pylorus by introducing a luminous catheter, identified during flexible peritoneoscopy. Metabolic validation: results are pending, but comparison of endoscopy groups showed that duodenal exclusion allows for greater weight loss than GJA alone. Conclusion - This experimental research allows the metabolic and technical validation of an exclusive experimental endoscopic bypass model. A transition to man is planned for 2021
Lopez, Manuel. "L'approche mini-invasive en chirurgie pédiatrique : de la révolution à l'évolution d'une nouvelle approche chirurgicale." Thesis, Saint-Etienne, 2015. http://www.theses.fr/2015STET017T/document.
Full textIn this work, the concept of minimal invasive approach is described in its entirety. For pediatric surgeons, the concept was analyzed systematically meeting the clinical problems of patients in all fields of application. The result of this work is to answer all the big questions that were asked during the early days of the pediatric laparoscopy but also to respond to the latest questions about the perspectives. The goal of this thesis is to describe the evolution of laparoscopy in pediatric, and to report some applications. We have worked in several fields such as: Tolerance and safety of laparoscopy in advanced neonatal surgery, and its applications in Digestive Surgery, Thoracic, Retroperitoneoscopy, Oncology and Urology. This also introduces the use of less invasive techniques, such as magnet-assisted surgery of non-operative techniques in the correction on chest wall deformities, demonstrating their efficacity and efficiency
Gandar, Catherine. "Etude prospective d'un nouveau filtre percutané endocave "Anthéor" : à propos de 32 observations." Bordeaux 2, 1993. http://www.theses.fr/1993BOR2M087.
Full textLateur, Gabriel. "Développement de l'utilisation d'une sonde d'endo-échographie adaptée à l'arthroscopie de l'épaule." Thesis, Université Grenoble Alpes, 2020. http://www.theses.fr/2020GRALS015.
Full textCurrently, orthopedic surgery is evolving towards the constant search for minimal tissue aggressiveness for the patient and towards an optimized operative procedure. For a few years now, clinicians have been using ultrasound techniques for diagnostic and therapeutic purposes, particularly in the pathology of the upper limb, for which it is becoming more and more frequent that orthopedic surgeons are being trained in ultrasound techniques making it easier to read the various images and their interpretation. The development of the M15 endo-ultrasound probe aims to combine the advantages of external ultrasound with those of arthroscopic exploration for practitioners, by giving them more access to the deep structures of interest of the shoulder and allowing them a better quality visualization. The objective of this thesis work was to determine the place of endo-ultrasound during arthroscopic procedures at the shoulder.The first part of this work aims to lay the foundations of the anatomy and the main pathologies that can affect the articular complex of the shoulder as well as the bases of arthroscopy and ultrasound at the level of this complex. This seemed to us to be an essential prerequisite before moving on to developing the possibilities of using an endo-ultrasound probe during arthroscopic shoulder procedures.In the second part of this thesis, we assessed the feasibility of an endo-ultrasound exploration of structures of interest in the shoulder during an arthroscopic procedure using the M15 probe. We presented the principles of endo-echography then we exposed the results of the study of reproducibility of the procedure between manipulators of different level of experience and finally we were able to compare the methods of exploration of the structures of interest of the shoulder by endo-ultrasound versus exploration by external ultrasound. These experimental works are, to our knowledge, the first to have defined the place of endo-ultrasound in the course of shoulder arthroscopy procedures.The third part of this work allowed us to develop the perspectives of research and clinical applicability of these works around this original work and in particular the aspects concerning the vascularization of the shoulder and its means of intraoperative evaluation by endo-ultrasound probe as well as its application when taking care of common shoulder pathologies such as interstitial ruptures of the rotator cuff tendons, the removal of intra-tendinous calcifications and exploration of tendinitis of the long head of the biceps. We believe that it is essential to validate the exploration of these structures and pathologies during surgery procedure. We want to orient ourselves towards the definition of the applicability of the procedure to specific pathologies so that this intraoperative endoscopic imaging system whose usability has been validated ex-vivo can be validated in current practice in-vivo
Wallet, Lucille. "Etudes multiparamétriques de la voix et de la parole après cordectomie laser par voie endoscopique de type II - III." Phd thesis, Université de la Sorbonne nouvelle - Paris III, 2012. http://tel.archives-ouvertes.fr/tel-00817694.
Full textSananès, Nicolas. "Développement d'un dispositif médical innovant pour la prise en charge prénatale de la hernie de coupole diaphragmatique." Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAE034/document.
Full textWe developed a new balloon for Fetal Endoscopic Tracheal Occlusion (FETO) which allows an easy, remotely controlled, and non-invasive reversal occlusion. This "Smart-TO" balloon to overcome issues related to the airway reestablishment. The technology is based on a magnetic valve whose opening is actuated by the fringe field of an MRI scanner. The opeing of the valve induces the deflation of the balloon, which is then washed out by the fluid coming out from the lungs. The impermeability, occlusion and operation tests are promising. A very first experimentation on the monkey model showed appropriate functionality and operation of the "Smart-TO" balloon. Further in vitro and animal tests are planned. A patent has been filed in 2016. Preliminary risk analysis, regulatory routes exploration, and market study have been started but are still ongoing
Lopes, da Frota Moreira Pedro. "Model based force control for soft tissue interaction and applications in physiological motion compensation." Thesis, Montpellier 2, 2012. http://www.theses.fr/2012MON20179/document.
Full textThe introduction of robotic systems inside the operating room has changed the modern surgery, opening new possibilities to surgeons. The number of robotic systems inside the operation room is increasing every year. The progress of medical robots are associated to the development of new techniques to better control the interaction between the robot and living soft tissues. This thesis focus on the development of a model based force control designed to improve stability and robustness of force control addressed to medical applications. A study of soft tissue modeling is presented and a suitable model to be used in a real-time control is selected. After the analysis, the Kelvin Boltzmann model was chosen to be inserted in the proposed force control scheme based on Active Observers. Stability and robustness are theoretically and experimentally analyzed. The performance of the proposed force control is also investigated under physiological motion disturbances. At the end, to improve the disturbance rejection capability, an extra control loop is added using a disturbance estimation based on the Kelvin Boltzmann model and a Fourier series
Alonci, Giuseppe. "Injectable hydrogels for innovative clinical applications." Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAF064.
Full textThis thesis deals with the design of injectable hydrogels that can be used in minimally invasive surgery, such as endoscopic submucosal dissection (ESD), percutaneous hernia repair or fistulas closure.Polyamidoamines (PAAm) constitute a class of hydrogel of special interest for these purposes. After studying the different factors that affect their properties, we show that it is also possible to obtain PAAM-based microgels for applications in drug delivery or cell encapsulation.It is possible to synthesize redox-responsive nanocomposite degradable PAAm that can be injected into the submucosa of the stomach to facilitate the ESD.We show that hybrid alginate/PAAm hydrogels can be used for the percutaneous treatment of direct inguinal hernia and hydrogel-based creams have been prepared for use in fistulas closure. The last chapter of the thesis is devoted to the development of a new crosslinking strategy for hyaluronic acid in cosmetic surgery
Bano, Jordan. "Modélisation et correction des déformations du foie dues à un pneumopéritoine : application au guidage par réalité augmentée en chirurgie laparoscopique." Thesis, Strasbourg, 2014. http://www.theses.fr/2014STRAD010/document.
Full textAugmented reality can provide to surgeons during intervention the positions of critical structures like vessels. The 3D models displayed during a laparoscopic surgery intervention do not fit to reality due to pneumperitoneum deformations. This thesis aim is to correct these deformations to provide a realistic liver model during intervention. We propose to deform the preoperative liver model according to an intraoperative acquisition of the liver anterior surface. A deformation field between the preoperative and intraoperative models is computed according to the geodesic distance to anatomical landmarks. Moreover, a biomechanical simulation is realised to predict the position of the abdomino-thoracic cavity which is used as boundary conditions. This method evaluation shows that the position error of the liver and its vessels is reduced to 1cm
Caravaca, Mora Oscar Mauricio. "Development of a novel method using optical coherence tomography (OCT) for guidance of robotized interventional endoscopy." Thesis, Strasbourg, 2020. http://www.theses.fr/2020STRAD004.
Full textThere exists an unmet clinical need to provide doctors with a new method that streamlines minimally invasive endoscopic treatment of colorectal cancer to single operator procedures assisted by in-situ and real-time accurate tissue characterization for informed treatment decisions. A promising solution to this problem has been developed at the ICube laboratory, in which the flexible interventional endoscope (Karl Storz) was completely robotized, so allowing a single operator to independently telemanipulate the endoscope and two insertable therapeutic instruments with a joint control unit. However, the robot-assisted flexible endoscope is subject to the same diagnostic accuracy limitations as standard endoscopy systems. It has been demonstrated that endoscopic optical coherence tomography (OCT) has a good potential for imaging disorders in the gastrointestinal tract and differentiating healthy tissue from diseased. Neither OCT, nor the robotized endoscope can solve the limitations of current standard of care for colon cancer management alone. Combining these two technologies and developing a new platform for early detection and treatment of cancer is the main interest of this work, with the aim of developing a state-of-the-art OCT imaging console and probe integrated with the robotized endoscope. The capabilities of this new technology for imaging of the interior of the large intestine were tested in pre-clinical experiments showing potential for improvement in margin verification during minimally invasive endoscopic treatment in the telemanipulation mode
Pioche, Mathieu. "Optimisation de la technique de dissection sous muqueuse à l’aide d’un bistouri à jet d’eau haute-pression pulsée pour le traitement endoscopique des tumeurs superficielles du tube digestif." Thesis, Lyon 1, 2015. http://www.theses.fr/2015LYO10166/document.
Full textFirst of all, we worked on the training for unexperienced operators by developing a bovine colon model more adapted to the European situation where colo-rectal lesions are the most common. This model of rectum from bovine, easy to find and to prepare allows training in conditions most close to the human colonic wall than those offered by the pig stomach. Furthermore, such models allows to teach the initial skills but avoiding the risk of adverse events for the first procedures in humans. A future work evaluating the benefits of a learning support by a dedicated interactive software on this model with 37 french and Japanese students is now being analyzed and will be reported soon. Then we thought about the strategy of the procedure in order to make it more simple using the tunnel technique to perform ESD for the esophageal lesions. This strategy helps to maintain traction on the edges and offers a sort of triangulation physically expanding the working space. This strategy has become a standard for esophageal resections in many teams and we still work to improve its efficacy. Finally, we worked jointly with Nestis® Company to develop a tool to optimize the submucosal dissection procedure by combining the benefits of the catheters bi function (injecting and cutting with the same tool), but adding high pulsed pressure and capability to inject viscous macromolecular solutions. The Nestis® system allows for the first time this association and demonstrated his interest in terms of security and performance compared with the conventional method using the needle and a conventional electrocautery device. With this bi function tool, it is not necessary to change instrument frequently since all stages of the procedure are now done with a single device. Other projects are already included with this material to explore its benefits and its safety in human colonic dissection that is deemed as the most difficult due to the thinner wall. Finally, this material offers the possibility to inject pressurized active drugs which could be used in the future to prevent the occurrence of esophageal strictures or to direct healing. We also worked with the hospital Edouard Herriot pharmacy to stabilize the solution glycerol mix to allow its use in daily practice in our unit
Derathé, Arthur. "Modélisation de la qualité de gestes chirurgicaux laparoscopiques." Thesis, Université Grenoble Alpes, 2020. https://thares.univ-grenoble-alpes.fr/2020GRALS021.pdf.
Full textSous cœlioscopie, le traitement chirurgical permet une meilleure prise en charge du patient, et sa pratique est de plus en plus fréquente en routine clinique. Cette pratique présente néanmoins ses difficultés propres pour le chirurgien, et nécessite une formation prolongée pendant l’internat et en post-internat. Pour faciliter cette formation, il est notamment possible de développer des outils d’évaluation et d’analyse de la pratique chirurgicale.Dans cette optique, l’objectif de ce travail de thèse est d’étudier la faisabilité d’une méthodologie proposant, à partir d’un traitement algorithmique, des analyses à portée clinique pertinente pour le chirurgien. J’ai donc traité les problèmes suivants : Il m’a fallu recueillir et annoter un jeu de données, implémenter un environnement d’apprentissage dédié à la prédiction d’un aspect spécifique de la pratique chirurgicale, et proposer une approche permettant de traduire mes résultats algorithmiques sous une forme pertinente pour le chirurgien. Dès que cela était possible, nous avons cherché à valider ces différentes étapes de la méthodologie
Thomann, Guillaume. "Contribution à la chirurgie minimalement invasive : conception d'un coloscope intelligent." Lyon, INSA, 2003. http://theses.insa-lyon.fr/publication/2003ISAL0064/these.pdf.
Full textThe field of robotics is increasingly finding its place in the medical world. Taking an active part in the development of new operational methods, robotic technologies also supplement the task of the surgeon in the operating theatre. Due to their effectiveness in reinforcing the surgeons performance, robotic solutions are becoming increasingly required. After consulting thoroughly with specialists, in particular with gastro-enterologists, a new robotic structure has been proposed to allow improved conditions for the procedure of colonoscopy. This is in order to reduce the common injuries involving contact with the intestinal wall during the operation, which consists of exploring the colon to confirm a diagnosis or, more frequently, to intervene in the event of the detection of anomalies capable of evolving into cancer. It is proposed to redesign the distal segment of the colonoscope with the aim of limiting its contact with the intestine. The automation of this new actuator lies in its capacity to sense and control its distance from the intestinal wall. The design of a specific actuator EDORA (Distale Extremity with Automatique ORientation)is performed, using metal bellows and an electro-pneumatic actuation. A feasibility model indicated that the actuator reacts in a differential relationship to its transverse movements. A static mathematical model was formulated, and validated. Thanks to a uncoupled study from the pneumatic-mechanic system, a matched model is presented by using the Levenberg-Marquardt identification method. It is validated and consolidated by experimental tests. The EDORA-01 is equipped with 3 optical sensors without contact which make possible to estimate the position of the head of the coloscope compared to the wall. The three informations obtained control the three pressures in the three rooms of the EDORA-01. These controls make possible to maintain the head of the coloscope in the center of a tube representing the colon. The control efficiency being proven, it could be applied later on to a new prototy
Thomann, Guillaume Redarce Tanneguy Bétemps Maurice. "Contribution à la chirurgie minimalement invasive conception d'un coloscope intelligent /." Villeurbanne : Doc'INSA, 2004. http://docinsa.insa-lyon.fr/these/2003/thomann/index.html.
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