Dissertations / Theses on the topic 'Chirurgia endoscopica'
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Sbordone, Carolina. "Trattamento delle fratture blow-out dell’orbita: endoscopia versus chirurgia tradizionale." Doctoral thesis, Universita degli studi di Salerno, 2016. http://hdl.handle.net/10556/2211.
Full textIn the last decades, diagnostical imaging, surgical techniques, alloplastic materials, and surgical instruments development, allowed a great progress in management of orbital fractures. The aim of the present study was to evaluate the benefits of endoscopic repair of orbital blow-out fractures of the floor and of the medial wall. Therefore we compared the endoscopic surgical treatment and the traditional external surgical treatment to the orbit, using objective criteria. This study included 30 patients treated from April 2011 and December 2013, 15 with orbital blow-out floor fracture (Group 1) and 15 with orbital medial wall fracture (Group 2), for each group there was a control group treated with surgical traditional approach. For Group 1 seven patients were treated with endoscopic intranasal approach and eight patients were treated with external cutaneous incision to the medial orbital wall. For Group 2 eight patients were treated with endoscopic assisted transconjunctival approach and seven patients with transconjunctival approach to the orbital floor. Phisical examination, included an Hess Lancaster scheme and an Hertel exophthalmometer exam; CT scans were done pre and post surgery for each patient. The follow up period was of 12 months and included a CT scan control after six months post surgery, an endoscopic intranasal control at one, three, six and twelve months after 2 surgery, an Hess Lancaster scheme and an Hertel exophthalmometer exam at one, three and six months after surgery. To evaluate and compare the two approaches were used, for all patients, the following parameters: reduction rate of the herniated orbital tissue, enophthalmos, operation time, hospital stay, postoperative complications. One case in the endoscopic endonasal reduction group had a more than 2 mm enophthalmos after surgery. Among patients with medial orbital wall fracture, the average reduction rate of the herniated orbital tissue was of 90% for the endoscopic endonasal reduction group and 92% for the traditional approach reduction group. Among patients with orbital floor fracture, the average reduction rate was of 87% for the transconjunctival endoscopic assisted reduction group and 86% for the transconjunctival approach reduction group. None of the above differences were statistically significant. However, among the patients that were treated with an endoscopic reduction the average hospital stay and the presence of postoperative complications were lower than in patients treated with the traditional approach, the difference was statistically significant. Among patients treated with endoscopic approach the average operation time was significantly greater than in patients treated with traditional approach, the difference was statistically significant. The two surgical methods seems to have a similar effectiveness; however endoscopic approach seems to be more advantageous with respect of the length of hospital stay and the postoperative complications. [edited by author]
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BALDARELLI, Maddalena. "Terapia neoadiuvante ed escissione locale mediante microchirurgia endoscopica transanale (T.E.M.) nel cancro del retto." Doctoral thesis, Università Politecnica delle Marche, 2010. http://hdl.handle.net/11566/242256.
Full textEmiliani, Nicolas. "Progettazione e sviluppo con tecniche di stampa 3D di un simulatore multimateriale paziente specifico per la chirurgia endoscopica dei seni paranasali." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2022.
Find 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)
Ott, 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
Eisendrath, Pierre. "Endoscopic Treatment of Post-Bariatric Leaks." Doctoral thesis, Universite Libre de Bruxelles, 2016. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/239685.
Full textDoctorat en Sciences médicales (Médecine)
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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.
Full textRousseau, Eric. "Curage axillaire préparé par lipoaspiration et assisté par endoscopie dans le traitement chirurgical des cancers du sein (à propos de 43 cas)." Bordeaux 2, 1997. http://www.theses.fr/1997BOR23052.
Full textURSI, PIETRO. "Escissione locale: TEM (Transanal Endoscopic Microsurgery) vs TAE (Trans anal Excision) nel trattamento dei tumori del retto non avanzato." Doctoral thesis, Università Politecnica delle Marche, 2010. http://hdl.handle.net/11566/242253.
Full textMartin, Olivier. "Intérêt diagnostique et thérapeutique de l' endoscopie naso-sinusienne." Clermont-Ferrand 1, 1987. http://www.theses.fr/1987CLF11003.
Full textCastillo, Laurent. "Iatrogenie et complications de la chirurgie sinusienne endonasale per-endoscopique : prevention, reparation." Nice, 1991. http://www.theses.fr/1991NICE6841.
Full textLATIL, D'ALBERTAS DANIEL. "Place de l'endoscopie en otologie et en oto-neuro-chirurgie." Toulouse 3, 1993. http://www.theses.fr/1993TOU31547.
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
Caillaud, Philippe. "La ventriculoscopie : réalités et perspectives d'une méthode, à propos de 51 observations." Bordeaux 2, 1994. http://www.theses.fr/1994BOR23067.
Full textDirksen, Carmen Desirée. "Medical technology assessment of endoscopic surgery costs, effects and diffusion of laparoscopic cholecystectomy and laparoscopic inguinal hernia repair /." [Maastricht : Maastricht : Universiteit Maastricht] ; University Library, Maastricht University [Host], 1998. http://arno.unimaas.nl/show.cgi?fid=8252.
Full textPetrella, Francesco. "EXPERIMENTAL AND CLINICAL AIRWAY RESTORATION BY MESENCHYMAL STROMAL CELLS AUTOLOGOUS ENDOSCOPIC TRANSPLANTATION." Doctoral thesis, Università degli studi di Padova, 2017. http://hdl.handle.net/11577/3421925.
Full textLa fistola bronco pleurica post chirurgica è una comunicazione patologica fra le vie aeree e lo spazio pleurico che puo’ verificarsi dopo resezione polmonare. Essa puo’ essere causata da chiusura bronchiale incompleta, da alterazioni della cicatrizzazione del moncone bronchiale o dalla distruzione del moncone da parte di tessuto neoplastico residuo. La sua mortalità varia dal 12.5 al 71.2%, rendendola ancora oggi la piu’ temuta complicanza dopo resezione polmonare; per tale ragione, l’effetto cicatriziale promosso dalle cellule staminali – tramite la trasformazione in cellule mature con una specifica funzione o tramite l’implementazione di meccanismi intrinseci di riparazione – potrebbe rappresentare una opzione terapeutica efficace e, ad oggi , solo parzialmente esplorata. Le cellule mesenchimali stromali hanno la capacità di migrare ed attecchire a siti di infiammazione e danno tissutale, in risposta a citochine, chemochine e fattori di crescita e possono esercitare un’azione riparativa locale attraverso un’azione di transdifferenziazione o attraverso un’azione di secrezione paracrina di fattori solubili con proprietà antiinfiammatori e procicatriziali. Noi abbiamo proposto, su di un modello animale , un trapianto autologo di cellule stromali mesenchimali di derivazione midollare: questo ha permesso una cicatrizzazione del moncone bronchiale grazie alla proliferazione di fibroblasti ed all’apposizione di matrice collagene. Incoraggiati dalla riparazione delle vie aeree sul modello di grande animale abbiamo utilizzato tale metodica per trattare un paziente che aveva sviluppato una fistola bronco pleurica. Il trapianto broncoscopico di cellule stromali mesenchimali midollari si è rivelato efficace – nel nostro caso clinico – nella chiusura di una piccola fistola post chirurgica, stimolando ulteriormente l’approccio di medicina rigenerativa anche per problemi di vie aeree. Considerando la necessità di marcare le cellule stromali mesenchimali dopo un trapianto cellulare, al fine di valutare differenti metodi di impianto, di seguire la loro migrazione nel corpo e di quantificare il loro accumulo al sito bersaglio, abbiamo proposto la risonanza magnetica nucleare come metodo per la marcatura cellulare, sia con mezzi di contrasto superparamagnetici che con formulazioni di nanoemulsioni con fluoro, osservando come entrambe si siano dimostrate efficaci, senza tuttavia alterare la biodisponibilità cellulare o la loro differenziazione. Infine, abbiamo proposto l’impiego di cellule stromali mesenchimali insieme alla somministrazione di G-CSF come metodo piu’ rapido e nuova frontiera nella riparazione delle vie aeree.
Georgel, 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 textWinter, Marco. "Image-based incremental reconstruction, rendering and augmented visualization of surfaces for endoscopic surgery = Bildbasierte inkrementelle Rekonstruktion, Darstellung und erweiterte Visualisierung von Oberflächen für die endoskopische Chirurgie." kostenfrei, 2009. http://d-nb.info/1000613615/34.
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
Tremolada, G. "VALUTAZIONE DI UNA NUOVA TECNICA CHIRURGICA PER LA CORREZIONE IN UTERO DELL'ERNIA DIAFRAMMATICA IN UN MODELLO ANIMALE: RISULTATI PRELIMINARI." Doctoral thesis, Università degli Studi di Milano, 2011. http://hdl.handle.net/2434/152901.
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 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 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
Guérin, Hélène. "Les complications de la sphinctérotomie endoscopique." Montpellier 1, 1990. http://www.theses.fr/1990MON11197.
Full textRahmi, Gabriel. "Thérapie cellulaire en endoscopie interventionnelle digestive." Thesis, Sorbonne Paris Cité, 2015. http://www.theses.fr/2015USPCB142.
Full textRecent developments in digestive interventional endoscopy lead us to manage two types of digestive disease. First, it is digestive fistulas associated in many cases with high morbi-mortality; and second is oesophageal stenosis after extended superficial endoscopic resection. In both situations, chronic inflammatory process resulted in delayed or no fistula healing for the first case or oesophageal stenosis due to fibrosis. Cellular therapy has proved to be successful in reducing the inflammatory process and to promote tissue healing. Tissue therapy with 3D construct stem cells represents a major advantage by allowing a direct adaptation on the right place. Our objective was to evaluate the therapeutic effect of new strategy to close the digestive fistula and to prevent oesophageal stenosis. First step was to evaluate the effect of labelled human bone marrow derived mesenchymal stem cells engraftment in the form of double cellsheet in a post-surgical fistula model in nude mice. Clinical and radiological (MRI and probe based confocal microscopy) evaluation showed a better fistula healing with higher microvascularization and a faster fistula closing in grafted mice. These effects appear to be related to an increase production of factors involved in tissue repair (EGF et le VEGF) and anti-inflammatory cytokines (TGF-ß2 et IL-10). We developed an unpublished eso-cutaneous fistula in a porcine model after plastic catheters placement by surgical and endoscopic way between the oesophageal lumen and the skin. We evaluated the therapeutic effect of a hydrogel with extracellular vesicles extracted from porcine adipose derived stem cells. The hydrogel with vesicles was injected into the fistula by endoscopy. Radiological and histological evaluation 15 days after injection showed a fistula tract closure in treated group.The third part of this work was to evaluate the effect of allograft of adipose derived stem cells 3D construct to prevent the stenosis after extended endoscopic submucosal dissection in a porcine model. There was a significant reduction of number and degree of stenosis with decrease fibrosis infiltration in the grafted group.In summary, thanks to their paracrine and antifibrotic effect, the mesenchymal stem cells organised as 3D construct allowed fistula closure in an entero-cutaneous model in mice and prevention of stenosis after extended oesophageal submucosal dissection in a porcine model. Moreover, endoscopic hydrogel and extracellular vesicles injection allowed oesophageal fistula healing in a porcine model. These promising results pose the challenge of future clinical studies
Jacques, 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 textNajah, Haythem. "Apport des nouvelles technologies dans l’exploration de la cavité péritonéale et la détection de la carcinose péritonéale : endoscopie péritonéale souple et chromoendoscopie virtuelle." Thesis, Sorbonne Paris Cité, 2018. http://www.theses.fr/2018USPCC066/document.
Full textThe prognosis of peritoneal carcinomatosis (PC) has improved and today, its treatment could lead to long-term survivals in some selected patients. One of the major prognosis factors of this condition is the extent of the disease measured in terms of Peritoneal cancer index (PCI). The management of PC has to evolve towards two main goals: first an accurate evaluation of the disease burden in order to recognize the patients amenable to complete cytoreduction (CCR), and second an early detection of the disease. Unfortunately, current imaging methods strongly lack sensitivity in determining small tumor nodules, and it is often only at the time of laparotomy that an accurate evaluation of the PCI is possible.In this work, we have studied the potential role of two new techniques in the evaluation of PC: peritoneal flexible endoscopy and virtual chromoendoscopy.In the first part of the thesis, we present our technique of single incision laparoscopic peritoneal exploration (SILPE), in which we perform a peritoneoscopy with both a rigid endoscope and a flexible endoscope. Through a series a 183 SILPE, we showed that this technique is safe and feasible. The SILPE procedure was successful in 90.2% of the cases. Five postoperative complications were observed (3%). The positive predictive value of SILPE to predict CCR was 79.5%. The PCI was 9.7±7.5 at the time of SILPE, and 13.5±9.6 at the time of laparotomy (p<0.0001). The number of the regions explored by SILPE was 12.2±1.6, and by laparotomy 13.0±0.3 (p<0.0001). The number of affected regions was 5.4±3.8 at the time of SILPE and 6.9±4.5 at the time of laparotomy (p<0.0001). The overall sensitivity of SILPE in the detection of PC in the different regions was 75%, with a specificity of 97%, thus an accuracy rate of 85%. In the second part of this thesis, we have studied the role of virtual chromoendoscopy in the peritoneal exploration and PC detection. We started from the hypothesis that, as any organ subject to a metastatic process, the peritoneum would change according to the theory of the metastatic niche, changes that could be detected by this technology. FICE is a virtual chromoendoscopy system that is merchandised with 10 factory-determined presets, built from different reduced single-wavelength images. We have first carried out a feasibility study in human in which peritoneal endoscopies using the FICE system were performed. Thanks to an evaluation plan based on two questionnaires, we have determined the three FICE channels suitable for peritoneal exploration (channels 2, 6, and 9). For brightness, white light endoscopy was judged superior to all FICE channels (p<0.0001). FICE Channel 2 was superior to white light endoscopy and other FICE channels, in terms of contrast, visualization of vascular architecture, differentiation between organs, and detection of PC (p<0.0001). In a second study, we created a murine model of an incipient PC. Mice had peritoneal explorations with FICE at different times. For each PC nodule detected, one white light endoscopy and 10 FICE images were recorded. 935 images corresponding to 85 nodules were analyzed. Each image was then divided into its elementary red, green and blue band images. Therefore, we compared the contrasts obtained with each wavelength. Thus, we’ve determined the wavelength of the white light specter that provides the highest contrast between PC nodule and background peritoneum. It was the monochromatic light with a wavelength at 460 nm (p<0.0001), with a mean contrast value of 0.240±0.151. A patent via InsermTransfert has been filed
Sars, Vincent de. "Conception et commande d' une micro-structure active à haute mobilité : application à la chirurgie mini-invasive." Paris 6, 2005. http://www.theses.fr/2005PA066249.
Full textCabras, Paolo. "3D Pose estimation of continuously deformable instruments in robotic endoscopic surgery." Thesis, Strasbourg, 2016. http://www.theses.fr/2016STRAD007/document.
Full textKnowing the 3D position of robotized instruments can be useful in surgical context for e.g. their automatic control or gesture guidance. We propose two methods to infer the 3D pose of a single bending section instrument equipped with colored markers using only the images provided by the monocular camera embedded in the endoscope. A graph-based method is used to segment the markers. Their corners are extracted by detecting color transitions along Bézier curves fitted on edge points. These features are used to estimate the 3D pose of the instrument using an adaptive model that takes into account the mechanical plays of the system. Since this method can be affected by model uncertainties, the image-to-3d function can be learned according to a training set. We opted for two techniques that have been improved : Radial Basis Function Network with Gaussian kernel and Locally Weighted Projection. The proposed methods are validated on a robotic experimental cell and in in-vivo sequences
Hünerbein, Michael. "Verbesserung der chirurgischen Therapieplanung gastrointestinaler Tumoren durch neue Techniken der Endosonographie und Staging-Laparoskopie." Doctoral thesis, Humboldt-Universität zu Berlin, Medizinische Fakultät - Universitätsklinikum Charité, 2002. http://dx.doi.org/10.18452/13837.
Full textAccurate preoperative staging of gastrointestainal tumors is essential for planning of surgical therapy. Endoscopic ultrasound has improved evaluation of locoregional tumor spread significantly. However, there are some technical problems that limit the clinical value of endoscopic ultrasound with currently available techniques. The most important limitations is the insatisfactory sensitivity for metastatic disease. We have developed new technologies for endoscopic ultrasound that can overcome most of the problems encountered with conventional endoscopic ultrasound. Furthermore a staging algorithm including the use of laparoscopy and laparoscopic ultrasound was evaluated to enhance the sensitivity for distant metastases. The results of our studies show that innovative endoscopic techniques, i.e. miniprobe ultrasonography, 3D endoscopic ultrasound and endoscopic ultrasound guided can improve the accuray of endoscopic ultrasound in the staging of gastrointestinal cancers. Laparoscopy and laparoscopic ultrasonography are ideal adjunct to endoscopic ultrasound, because both increase the sensitivity for distant metastases significantly. Combined staging with innovative endoscopic techniques and staging laparoscopy facilitates planning of surgery and multimodal therapy.
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 textFascetti, Leon Francesco. "Utilizzo di precursori muscolari scheletrici e precursori derivati da sistema neuroenterico nella correzione di difetti sfinteriali." Doctoral thesis, Università degli studi di Padova, 2011. http://hdl.handle.net/11577/3421627.
Full textIl progetto di ricerca nasce dall’ipotesi dell’utilizzo di approcci di terapia cellulare ed ingegneria tissutale nel tratto digerente. L’ambiente clinico da cui nasce lo spunto per questo progetto di ricerca è la Chirurgia Pediatrica. Tuttavia le tematiche affrontate abbracciano trasversalmente ogni fascia di età. Ci si è interessati in particolare alla possibilità di correggere difetti “sfinteriali” tramite l’utilizzo di precursori derivati dal muscolo scheletrico. In tale ottica sono state esplorate le capacità di integrazione nel tessuto contrattile del tubo digerente di precursori cellulari del muscolo scheletrico (cellule staminali committed). Sono stati eseguiti esperimenti in vivo e in vitro. La maggior parte dei dati sono stati ottenuti utilizzando un modello di danno da congelamento a carico della giunzione gastro-esofagea di topo. Sono state esplorate le possibilità di rigenerazione dopo iniezione di cellule satellite coltivate o a fresco ottenute con la tecnica della singola fibra. Il candidato ha personalmente utilizzato diverse tecniche per l’ottenimento di precursori staminali da muscolo scheletrico, colture cellulari primarie, coculture tra vari tipi cellulari, nonché varie tecniche di analisi (istologia convenzionale, analisi d’immunofluorescenza delle criosezioni, western-blotting, citofluorimetria, analisi statistica e d’immagine microscopica). Per gli esperimenti in vivo,inoltre, sono state utilizzate tecniche di microchirurgia sul piccolo animale. Risultati del lavoro svolto sono stati oggetto di presentazioni in congressi nazionali ed internazionali: - Murine Muscle Precursor Cells survived and integrated in a Cryoinjured Gastroesophageal Junction. Fascetti Leon F, Malerba A, Boldrin L, Leone E, Betalli P, Pasut A, Zanon GF, Gamba PG, Vitiello L, DeCoppi P. J Surg Res. Epub 2007 Jun 19 - Muscle precursors injection in the gastroesophageal junction: further experience. Fascetti Leon F, Malerba A, Boldrin L, Zanon GF, Gamba PG, Pierro A, De Coppi P. Oral presentation at the 8th European Congress of Paediatric Surgery (EUPSA) Turin, Italy 2007 In vitro enhancement of muscle precursors cells differentiation enhanced by co-cultures with neurogenic cells. A Malerba, F Fascetti Leon, L Boldrin, C Caldwell, N, Thapar, A Pierro, P De Coppi British Association of Paediatric Surgeons (BAPS) annual meeting Edimburgh, UK 2007 - Further experience with the injection of muscle precursors in the gastroesophageal junction Fascetti Leon F, Malerba A, Boldrin L, Vitello L, Talenti E, Zanon GF, Gamba PG, Pierro A, De Coppi P. presentation at the American Paediatric Surgeons Association (APSA) Orlando, Florida 2007 - Long term integration of muscle precursor cells injected in the lower esophageal sphincter. Fascetti Leon F, Malerba A, Boldrin L, Betalli P, Gamba PG, Vitiello L, A. Pierro, DeCoppi P. submitted. Gli esperimenti “in vivo” e ‘analisi istologica sono stati condotti presso il Centro inter-dipartimentale Vallisneri dell’Unioversità di Padova. Le colture cellulari sono state eseguite presso il Laboratorio di Medicina Rigenerativa Della Città della Speranza (c/o Dipartimento di Pediatria e Istituto VIMM). Parte dell’analisi e delle co-culture sono state eseguite presso l’Institute of Child Health - Great Ormond Street Hospital di Londra. Il lavoro svolto porta alla conclusione che cellule precursori muscolari derivati da tessuto muscolare scheletrico adulto sono potenzialmente utilizzabili nella rigenerazione delle strutture contrattili del tubo digerente. In particolare la buona capacità di integrazione e dati sulla possibile trans-differenziazione verso la linea cellulare muscolare liscia stimolano a proseguire nella direzione di una terapia cellulare dei difetti sfinteriali. Pochi dati sono derivati dagli esperimenti condotti sullo sfintere anale interno, che vanno pertanto considerati preliminari. Inoltre la capacità di integrazione e interazione in vitro tra cellule nervose gangliari e muscolari derivate da muscolo scheletrico fanno pensare ad un più ampio utilizzo nei difetti di contrattilità gastro-intestinali.
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 textQuénéhervé, Lucille. "Applications de l'imagerie à l'étude de la barrière intestinale et de son microenvironnement dans les états inflammatoires digestifs." Thesis, Nantes, 2020. https://archive.bu.univ-nantes.fr/pollux/show/show?id=c9a7c6c3-bc46-4678-b2b0-e913e12619e7.
Full textThe study of the remodeling of the digestive barrier and its microenvironment during pathologies of interest using innovative endoscopic techniques could enable to identify diagnostic or prognostic biomarkers in these pathologies. The first study reported in this work enabled to define quantitative morphological parameters to characterize the colonic mucosa in confocal endomicroscopy. We created a score for the diagnosis of inflammatory bowel disease and another score for the diagnosis of ulcerative colitis or Crohn's disease. The second study aimed to study the remodeling of the colonic mucosa after allogeneic hematopoietic stem cells transplantation, notably through the analysis of confocal endomicroscopy parameters highlighted during the first study. This study showed changes in the size and shape of the crypts after allograft compared to controls, without finding predictive factors for the development of graft versus host disease. The third study showed the feasibility of the analysis of the mucosa! structures within standard endoscopic biopsies in full field optical coherence tomography, a new imaging technique characterized by a resolution of about 1 μm and the possibility to distinguish cellular and microenvironmental structures according to their "micromovements"
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
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
FANELLO, GIANFRANCO. "Identificazione, inquadramento e terapia endoscopica delle neoplasie precoci del colon-retto." Doctoral thesis, 2016. http://hdl.handle.net/11573/873013.
Full textCEREATTI, FABRIZIO. "Role of endoscopic ultrasonography and fine needle aspiration in the managment of pancreatic masses." Doctoral thesis, 2018. http://hdl.handle.net/11573/1044064.
Full textWinter, Marco [Verfasser]. "Image-based incremental reconstruction, rendering and augmented visualization of surfaces for endoscopic surgery = Bildbasierte inkrementelle Rekonstruktion, Darstellung und erweiterte Visualisierung von Oberflächen für die endoskopische Chirurgie / vorgelegt von Marco Winter." 2010. http://d-nb.info/1000613615/34.
Full textSüß, Malte. "Therapie breitbasiger Adenome und der pT1-low-risk-Karzinome des Rektums." Doctoral thesis, 2005. http://hdl.handle.net/11858/00-1735-0000-0006-AF24-E.
Full textBendouah, Zohra. "Implication des biofilms dans la rhinosinusite chronique et l’évaluation des traitements avec un modèle in vitro." Thèse, 2008. http://hdl.handle.net/1866/4358.
Full textIntroduction: The role of biofilms in chronic diseases is increasingly recognized. Chronic rhinosinusitis, with its chronic indolent course, resistance to antibiotics, and acute exacerbations, has an evolution that parallels that of other biofilm-related diseases. Objectives: 1-To develop an in vitro method to assess the biofilm formation capacity. 2- To determine whether biofilm-forming capacity of bacteria demonstrated in chronic rhinosinusitis has an impact on persistence of the disease following endoscopic sinus surgery. 3- To determine the in vitro activity of moxifloxacin against Staphyylococcus aureus in biofilm form. Method: Thirty-one bacterial strains recovered from 19 patients with chronic rhinosinusitis at least one year post-endoscopic sinus surgery. Evolution of disease was assessed by questionnaire and endoscopy as favorable or unfavorable. The bacteria were cultured on a 96-well culture plaque and a semi-quantitative method using crystal violet to quantify biofilm production was used. Confirmation of the effect of the antimicrobial agents on viability was performed with confocal laser microscopy, using a LIVE/DEAD BacLight staining. Results: Twenty-two of 31 samples produced a biofilm thicker or equal to the positive control. Biofilm formation was associated with a poor evolution for Pseudomonas aeruginosa and Staphylococcus aureus, but not for coagulase-negative staphylococci. Biofilm treated with moxifloxacin at 1000X (0.1mg/ml – 0.2 mg/ml) gave a 2 to 2.5 log reduction in number of viable bacteria. Conclusion: We have shown that Crystal violet method is able to detect biofilm formation. There is a correlation between in vitro biofilm production by Pseudomonas aeruginosa and Staphylococcus aureus and unfavorable evolution after endoscopic sinus surgery, suggesting a role for biofilm in chronic rhinosinusitis. Increased concentrations of moxifloxacin, easily attainable in topical solutions have a potential role in the management of biofilm infections.