Готові списки джерел за темами / Flexible endoscopy

Добірка наукової літератури з теми "Flexible endoscopy"

Автор: Grafiati
Опубліковано: 14 березня 2023

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Статті в журналах з теми "Flexible endoscopy"

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Sweigert, Patrick, Adam Van Huis, Eric Marcotte, and Bipan Chand. "Flexible Endoscopy: The Fundamentals." Digestive Disease Interventions 02, no. 04 (December 2018): 289–98. http://dx.doi.org/10.1055/s-0038-1675754.

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Анотація:
Endoscopy highlights the intersection of technological advancements and medical application. Innovation in optics, illumination, imaging, and manufacturing has allowed for the development of a complex array of instruments for use by endoscopists. Flexible gastrointestinal (GI) endoscopy has emerged to become a well-established minimally invasive aspect of prevention, diagnosis, and treatment of GI disease.Flexible endoscopes and their associated instruments and platforms are described, acknowledging that such lists are dynamic. The procedure environment is also described in terms of location, equipment, ergonomics, personnel involved, and recovery considerations.Recommendations from GI and anesthesiology associations are outlined to summarize current practices in the administration of sedative drugs to reduce patient discomfort, allow for a technically successful procedure, and reduce patient memory of the procedure.The training process for GI endoscopy is described for general surgery residents and GI fellows. Training involves didactic and technical curriculum along with mentor-supervised endoscopic procedures. After the completion of training, residents and fellows proceed through a credentialing process, which culminates in granting privileges to an individual to perform GI endoscopic procedures. Once in practice, providers must stay up to date on the ever-changing world of medical documentation, coding, and billing to ensure appropriate reimbursement.
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2

Carniol, Eric T., Alejandro Vázquez, Tapan D. Patel, James K. Liu, and Jean Anderson Eloy. "Utility of Intraoperative Flexible Endoscopy in Frontal Sinus Surgery." Allergy & Rhinology 8, no. 2 (January 2017): ar.2017.8.0205. http://dx.doi.org/10.2500/ar.2017.8.0205.

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Background Surgical management of the frontal sinus can be challenging. Extensive frontal sinus pneumatization may form a far lateral or supraorbital recess that can be difficult to reach by conventional endoscopic surgical techniques, requiring extended approaches such as the Draf III (or endoscopic modified Lothrop) procedure. Rigid endoscopes may not allow visualization of these lateral limits to ensure full evacuation of the disease process. Methods Here we describe the utility of intraoperative flexible endoscopy in two patients with far lateral frontal sinus disease. Results In both cases, flexible endoscopy allowed confirmation of complete evacuation of pathologic material, thereby obviating more extensive surgical dissection. Conclusion In cases where visualization of the far lateral frontal sinus is inadequate with rigid endoscopes, flexible endoscopy can be used to determine the need for more extensive dissection.
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Nelson, Douglas B., William R. Jarvis, William A. Rutala, Amy E. Foxx-Orenstein, Gerald Isenberg, Georgia P. Dash, Carta J. Alvarado, et al. "Multi-society Guideline for Reprocessing Flexible Gastrointestinal Endoscopes." Infection Control & Hospital Epidemiology 24, no. 7 (July 2003): 532–37. http://dx.doi.org/10.1086/502237.

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The beneficial role of gastrointestinal endoscopy for the prevention, diagnosis, and treatment of many digestive diseases and cancer is well established. Like many sophisticated medical devices, the endoscope is a complex, reusable instrument that requires reprocessing before being used on subsequent patients. The most commonly used methods for reprocessing endoscopes result in high-level disinfection. To date, all published episodes of pathogen transmission related to gastrointestinal endoscopy have been associated with failure to follow established cleaning and disinfection/sterilization guidelines or use of defective equipment. Despite the strong published data regarding the safety of endoscope reprocessing, concern over the potential for pathogen transmission during endoscopy has raised questions about the best methods for disinfection or sterilization of these devices between patient uses.
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4

Torres-Corzo, Jaime G., Leonardo Rangel-Castilla, Mario Alberto Islas-Aguilar, and Roberto Rodríguez-Della Vecchia. "A Novel Approach of Navigation-Assisted Flexible Neuroendoscopy." Operative Neurosurgery 14, no. 3 (May 18, 2017): E33—E37. http://dx.doi.org/10.1093/ons/opx118.

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Abstract BACKGROUND AND IMPORTANCE Neuronavigation-assisted endoscopy is commonly used for skull base and intraventricular surgery. Flexible neuroendoscopy offers certain advantages over rigid endoscopy; however, a major disadvantage of the flexible endoscope has been easy disorientation in the flexed position. Neuronavigation-assisted flexible neuroendoscopy was not available until now. This is the first report of the use of navigation-assisted flexible neuroendoscopy in a patient with hydrocephalus. CLINICAL PRESENTATION A 10-mo-old girl presented with irritability and vomiting to the emergency department and was found to have severe hydrocephalus. The patient underwent successful endoscopic third ventriculostomy and exploration of the ventricles (lateral, third, cerebral aqueduct, fourth) and basal cisterns with the flexible neuroendoscopy assisted with electromagnetic neuronavigation. CONCLUSION As demonstrated by this initial experience, neuronavigation-assisted flexible neuroendoscopy is a feasible and safe tool, endoscopic procedures with the flexible endoscope may be possible in a safer manner. We report the first use of neuronavigation-assisted flexible neuroendoscopy to perform an ETV and exploration of the entire ventricular system. Further evaluation will be necessary to define and expand its applications in neurosurgery.
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Sivananthan, Arun, Alexandros Kogkas, Ben Glover, Ara Darzi, George Mylonas, and Nisha Patel. "A novel gaze-controlled flexible robotized endoscope; preliminary trial and report." Surgical Endoscopy 35, no. 8 (May 24, 2021): 4890–99. http://dx.doi.org/10.1007/s00464-021-08556-1.

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Abstract Background Interventional endoluminal therapy is rapidly advancing as a minimally invasive surgical technique. The expanding remit of endoscopic therapy necessitates precision control. Eye tracking is an emerging technology which allows intuitive control of devices. This was a feasibility study to establish if a novel eye gaze-controlled endoscopic system could be used to intuitively control an endoscope. Methods An eye gaze-control system consisting of eye tracking glasses, specialist cameras and a joystick was used to control a robotically driven endoscope allowing steering, advancement, withdrawal and retroflexion. Eight experienced and eight non-endoscopists used both the eye gaze system and a conventional endoscope to identify ten targets in two simulated environments: a sphere and an upper gastrointestinal (UGI) model. Completion of tasks was timed. Subjective feedback was collected from each participant on task load (NASA Task Load Index) and acceptance of technology (Van der Laan scale). Results When using gaze-control endoscopy, non-endoscopists were significantly quicker when using gaze-control rather than conventional endoscopy (sphere task 3:54 ± 1:17 vs. 9:05 ± 5:40 min, p = 0.012, and UGI model task 1:59 ± 0:24 vs 3:45 ± 0:53 min, p < .001). Non-endoscopists reported significantly higher NASA-TLX workload total scores using conventional endoscopy versus gaze-control (80.6 ± 11.3 vs 22.5 ± 13.8, p < .001). Endoscopists reported significantly higher total NASA-TLX workload scores using gaze control versus conventional endoscopy (54.2 ± 16 vs 26.9 ± 15.3, p = 0.012). All subjects reported that the gaze-control had positive ‘usefulness’ and ‘satisfaction’ score of 0.56 ± 0.83 and 1.43 ± 0.51 respectively. Conclusions The novel eye gaze-control system was significantly quicker to use and subjectively lower in workload when used by non-endoscopists. Further work is needed to see if this would translate into a shallower learning curve to proficiency versus conventional endoscopy. The eye gaze-control system appears feasible as an intuitive endoscope control system. Hybrid gaze and hand control may prove a beneficial technology to evolving endoscopic platforms.
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Serdar Karaca, Ahmet, M. Mahir Özmen, Ahmet Çınar Yastı, and Seher Demirer. "Endoscopy in surgery." Turkish Journal of Surgery 37, no. 2 (June 1, 2021): 83–86. http://dx.doi.org/10.47717/turkjsurg.2021.000000576.

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Анотація:
In the last 20 years, there have been important developments in endoscopy. Initially, endoscopy was developed and used as a diagnostic tool. As new technology developed, these devices also became the basis for therapeutic maneuvers. In recent years, flexible endoscopes have been used to per- form procedures replacing traditional surgical approaches. Examples of this field are transanal minimally invasive surgery, natural orifice transluminal endoscopic surgery, endoscopic metabolic surgery and third space endoscopies. Throughout history, surgeons have played a vital role in the design and development of endoscopic techniques, procedures, and equipment. Surgeons continue to lead the advancement of endoscopy, make important contributions, and serve as role models for innovation.
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Hookey, Lawrence, David Armstrong, Rob Enns, Anne Matlow, Harminder Singh, and Jonathan Love. "Summary of Guidelines for Infection Prevention and Control for Flexible Gastrointestinal Endoscopy." Canadian Journal of Gastroenterology 27, no. 6 (2013): 347–50. http://dx.doi.org/10.1155/2013/639518.

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BACKGROUND: High-quality processes to ensure infection prevention and control in the delivery of safe endoscopy services are essential. In 2010, the Public Health Agency of Canada and the Canadian Association of Gastroenterology (CAG) developed a Canadian guideline for the reprocessing of flexible gastrointestinal endoscopy equipment.METHODS: The CAG Endoscopy Committee carefully reviewed the 2010 guidelines and prepared an executive summary.RESULTS: Key elements relevant to infection prevention and control for flexible gastrointestinal endoscopy were highlighted for each of the recommendations included in the 2010 document. The 2010 guidelines consist of seven sections, including administrative recommendations, as well as recommendations for endoscopy and endoscopy decontamination equipment, reprocessing endoscopes and accessories, endoscopy unit design, quality management, outbreak investigation and management, and classic and variant Creutzfeldt-Jakob Disease.DISCUSSION: The recommendations for infection prevention and control for flexible gastrointestinal endoscopy are intended for all individuals with responsibility for endoscopes in all settings where endoscopy is performed.
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Girard, Donna, and Pat Holland. "Flexible Endoscopy." Gastroenterology Nursing 28, no. 2 (March 2005): 167. http://dx.doi.org/10.1097/00001610-200503000-00045.

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Beilenhoff, Ulrike, Holger Biering, Reinhard Blum, Jadranka Brljak, Monica Cimbro, Jean-Marc Dumonceau, Cesare Hassan, et al. "Reprocessing of flexible endoscopes and endoscopic accessories used in gastrointestinal endoscopy: Position Statement of the European Society of Gastrointestinal Endoscopy (ESGE) and European Society of Gastroenterology Nurses and Associates (ESGENA) – Update 2018." Endoscopy 50, no. 12 (November 20, 2018): 1205–34. http://dx.doi.org/10.1055/a-0759-1629.

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Анотація:
AbstractThis Position Statement from the European Society of Gastrointestinal Endoscopy (ESGE) and the European Society of Gastroenterology Nurses and Associates (ESGENA) sets standards for the reprocessing of flexible endoscopes and endoscopic devices used in gastroenterology. An expert working group of gastroenterologists, endoscopy nurses, chemists, microbiologists, and industry representatives provides updated recommendations on all aspects of reprocessing in order to maintain hygiene and infection control.
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Sutton, Erica, Sheree Carter Chase, Rosemary Klein, Yue Zhu, Carlos Godinez, Yassar Youssef, and Adrian Park. "Development of Simulator Guidelines for Resident Assessment in Flexible Endoscopy." American Surgeon 79, no. 1 (January 2013): 14–22. http://dx.doi.org/10.1177/000313481307900109.

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Анотація:
Virtual reality (VR) simulators may hold a role in the assessment of trainee abilities independent of their role as instructional instruments. Thus, we piloted a course in flexible endoscopy to surgical trainees who had met Accreditation Council for Graduate Medical Education endoscopy requirements to establish the relationship between metrics produced by a VR endoscopic simulator and trainee ability. After a didactic session, we provided faculty instruction to senior residents for Case 1 upper endoscopy and colonoscopy modules on the CAE Endoscopy VR. Course conclusion was defined as a trainee meeting all proficiency standards in basic endoscopic procedures on the simulator. Simulator metrics and course evaluation comprised data. Eleven and eight residents participated in the colonoscopy and upper endoscopy courses, respectively. Average time to reach proficiency standards for esophagogastroduodenoscopy was 6 and 13 minutes for colonoscopy after a median of one (range, one to two) and one (range, one to four) task repetitions, respectively. Faculty instruction averaged 7.5 minutes of instruction per repetition. A subjective course evaluation demonstrated that the course improved learners’ knowledge of the subject and comfort with endoscopic equipment. Within a VR-based curriculum, experienced residents rapidly achieved task proficiency. The resultant scores may be used as simulator guidelines for resident assessment and readiness to perform flexible endoscopy.
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Більше джерел

Дисертації з теми "Flexible endoscopy"

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Mutschler, Klaus [Verfasser], and Roland [Akademischer Betreuer] Zengerle. "Needle-free trans-endoscopic micro injection for flexible endoscopy." Freiburg : Universität, 2017. http://d-nb.info/1168145686/34.

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Hale, Melissa F. "Magnetically assisted capsule endoscopy : a viable alternative to conventional flexible endoscopy of the stomach?" Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/14282/.

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Анотація:
Introduction: Oesophagogastroduodenoscopy is the investigation of choice to identify mucosal lesions of the upper gastrointestinal tract, but it is poorly tolerated by patients. A simple non-invasive technique to image the upper gastrointestinal tract, which could be made widely available, would be beneficial to patients. Capsule endoscopy is well tolerated by patients but the stomach has proved difficult to visualise accurately with capsule technology due to its’ capacious nature and mucosal folds, which can obscure pathology. MiroCam Navi (Intromedic Ltd, Seoul, Korea) is a capsule endoscope containing a small amount of magnetic material which has been made available with a handheld magnet which might allow a degree of control. This body of work aims to address whether this new technology could be a feasible alternative to conventional flexible endoscopy of the stomach. Methods: Four studies were conducted to test this research question. The first explores the feasibility of magnetically assisted capsule endoscopy of the stomach and operator learning curve in an ex vivo porcine model. This was followed by a randomised, blinded trial comparing magnetically assisted capsule endoscopy to conventional flexible endoscopy in ex vivo porcine stomach models. Subsequently a prospective, single centre randomised controlled trial in humans examined whether magnetically assisted capsule endoscopy could enhance conventional small bowel capsule endoscopy by reducing gastric transit time. Finally a blinded comparison of diagnostic yield of magnetically assisted capsule endoscopy compared to oesophagogastroduodenoscopy was performed in patients with recurrent or refractory iron deficiency anaemia. Results: In the first study all stomach tags were identified in 87.2% of examinations and a learning curve was demonstrated (mean examination times for the first 23 and second 23 procedures 10.28 and 6.26 minutes respectively (p<0.001). In the second study the difference in sensitivities between oesophagogastroduodenoscopy and conventional flexible endoscopy for detecting beads within an ex vivo porcine stomach model was 1.11 (95% CI 0.06, 28.26) proving magnetically assisted capsule endoscopy to be non-inferior to flexible endoscopy. In the first human study, although there was no significant difference in gastric transit time or capsule endoscopy completion rate between the two groups (p=0.12 and p=0.39 respectively), the time to first pyloric image was significantly shorter in the intervention group (p=0.03) suggesting that magnetic control hastens capsular transit to the gastric antrum but cannot impact upon duodenal passage. In the last study, a total of 38 pathological findings were identified in this comparative study of magnetically assisted capsule endoscopy and conventional endoscopy. Of these, 16 were detected at both procedures, while flexible endoscopy identified 14 additional lesions not seen at magnetically assisted capsule endoscopy and magnetically assisted capsule endoscopy detected 8 abnormalities not seen by oesophagogastroduodenoscopy. No adverse events occurred in either of the human trials. Finally magnetically steerable capsule endoscopy induced less procedural pain, discomfort and distress than oesophagogastroduodenoscopy (p=0.0009, p=0.001 and p=0.006 respectively). Conclusion: Magnetically assisted capsule endoscopy is safe, well tolerated and a viable alternative to conventional endoscopy. Further research to develop and improve this new procedure is recommended.
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Mertens, Benjamin. "Bringing 3D and quantitative data in flexible endoscopy." Doctoral thesis, Universite Libre de Bruxelles, 2014. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209275.

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In a near future, the computation power will be widely used in endoscopy rooms. It will enable the augmented reality already implemented in some surgery. Before reaching this, a preliminary step is the development of a 3D reconstruction endoscope. In addition to that, endoscopists suffer from a lack of quantitative data to evaluate dimensions and distances, notably for the polyp size measurement.

In this thesis, a contribution to more a robust 3D reconstruction endoscopic device is proposed. Structured light technique is used and implemented using a diffractive optical element. Two patterns are developed and compared: the first is based on the spatial-neighbourhood coding strategy, the second on the direct-coding strategy. The latter is implemented on a diffractive optical element and used in an endoscopic 3D reconstruction device. It is tested in several conditions and shows excellent quantitative results but the robustness against bad visual conditions (occlusions, liquids, specular reflection,) must be improved.

Based on this technology, an endoscopic ruler is developed. It is dedicated to answer endoscopists lack of measurement system. The pattern is simplified to a single line to be more robust. Quantitative data show a sub-pixel accuracy and the device is robust in all tested cases. The system has then been validated with a gastroenterologist to measure polyps. Compared to literature in this field, this device performs better and is more accurate.
Doctorat en Sciences de l'ingénieur
info:eu-repo/semantics/nonPublished

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Despott, Edward. "Advancing minimally invasive aspects of flexible gastrointestinal endoscopy." Thesis, Imperial College London, 2012. http://hdl.handle.net/10044/1/25139.

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Анотація:
The technological developments seen in recent years have facilitated remarkable progress in the field of flexible gastrointestinal (GI) endoscopy. Smaller high-resolution charge-coupled devices (CCDs) have facilitated the manufacture of ultrathin (UT) (<6mm) endoscopes, while the introduction of device assisted enteroscopy (balloon-assisted and spiral enteroscopy) has allowed endoscopists to access the deep small bowel (SB) without the need for recourse to major surgery. Furthermore, the application of double-balloon colonoscopy (DBC) has shown promise to improve outcomes in patients with 'technically difficult' colons. Although these 3 types of innovative endoscopic technologies all share the potential capacity to enhance minimally invasive patient care, research into their optimal role and effectiveness (particularly within UK clinical practice) remains limited. This thesis has examined the potential role of this selection of advanced flexible GI endoscopic technologies for the enhancement of minimally invasive patient care. The first study evaluated transnasal upper GI endoscopy in the UK and confirmed that within this clinical paradigm, transnasal endoscopy using UT endoscopes, is a feasible, effective and more acceptable alternative to patients than conventional oral upper GI endoscopy. The next series of studies were dedicated to device assisted enteroscopy (DBE in particular) and showed that DBE is capable of providing a safe and effective, minimally invasive alternative to major surgery in selected cases. A comparison of spiral enteroscopy as an alternative to DBE, showed that spiral enteroscopy (in its current, manual form), appears to be inferior to DBE in its ability to facilitate deep enteroscopy. The final study evaluated technically difficult colonoscopy and included the development and validation of a score for technical difficulty which may in the future be applied to routine clinical practice. This study also highlighted the usefulness of DBC as a potentially more effective tool than conventional colonoscopy for technically difficult cases.
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Gong, Feng. "Design, development and testing of miniature instruments for flexible endoscopy." Thesis, University College London (University of London), 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322407.

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Han, Zhimin. "Hyperspectral endoscopy imaging: system development, clinical evaluation, and further application." Diss., Georgia Institute of Technology, 2016. http://hdl.handle.net/1853/55026.

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Анотація:
Hyperspectral (HS) imaging combines spectral measurement of a pixel with 2D imaging technology. It is capable to provide a series of images containing both spectral and spatial information, and has been widely used in medical domain. However, most researches on medical HS imaging are regarding ex-vivo biopsy or skin and oral mucosa. The study on HS imaging regarding in-vivo disease lags far behind. In this thesis, we developed a novel flexible HS endoscope system. It is capable to obtain a series of HS images in vivo in a non-contact way among the wavelength range of 405 – 665 nm. After a lot of time-consuming modifying and debugging work, this new system has high stability and convenience to be applied in clinic now. We evaluated this system in clinic. First, we got ethics approval for clinical trials. Then, we obtained HS images regarding gastrointestinal (GI) diseases inside patients using this system. As far as we know, this type of in-vivo image data has not been reported in previous literatures. Thus using these HS images, we built a database for GI mucosa. Next, we analyzed some typical HS images tentatively. The method of Recursive Divergence is implemented to extract valuable and diagnostic information from these HS images. The results prove the effect and applicability of this new HS endoscope system, which has shown the great potential to be used as a platform and guidance for further medical studies. To further apply the analysis results in clinic, we propose a novel Adaptive Narrow-Band Imaging (ANBI) method based on band selection of HS images of a specific type of disease. It is expected that the new technique has higher accuracy, sensitivity, and specificity compared to conventional Narrow-Band Imaging (NBI) technique. In this thesis, we also discuss the future direction of the system improvement. Especially, to improve light intensity and signal-noise-ratio of HS images in wide-field view, we propose a new imaging method using broad- and overlapped-band filters. Although this method only performs greatly on the foundation of accurate image registration, we hope to apply it in our system in the future.
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7

Nishime, Thalita Mayumi Castaldelli. "Development and characterization of extended and flexible plasma jets /." Guaratinguetá, 2019. http://hdl.handle.net/11449/190654.

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Orientador: Konstantin Georgiev Kostov
Resumo: Nos últimos anos, tem intensificado o emprego de plasmas em pressão atmosférica para diferentes aplicações. Com o desenvolvimento dos jatos de plasma em pressão atmosférica, alguns tratamentos precisos, como no campo biomédico ou em específicos processamentos de superfícies, tornaram-se mais frequentes. No entanto, a aplicação de plasma à objetos irregulares, dentro de tubos ou mesmo dentro de órgãos ocos é limitada quando se utilizam configurações convencionais de jatos de plasma. Portanto, essas limitações podem ser superadas com o desenvolvimento de jatos de plasma alongados ou gerados remotamente. Neste trabalho, duas configurações de jato de plasma longo visando diferentes campos de aplicação foram aperfeiçoadas e caracterizadas. Inicialmente foi desenvolvido um jato de plasma endoscópico (plasma endoscope) operando em configuração de descarga por barreira dielétrica (DBD) com dimensões milimétricas, versátil ao acoplamento em endoscópios típicos. Este jato de plasma pode operar com hélio ou neônio e conta com um canal externo e concêntrico de gás que permite a introdução de uma cortina de gás eletronegativo ao redor da pluma de plasma. A cortina de proteção a gás preserva a forma do jato de plasma quando operado dentro de cavidades fechadas. As dificuldades advindas do desenvolvimento deste foram investigadas quando diferentes gases foram testados como cortina de proteção dele, dentre estes, o dióxido de carbono se mostrou uma boa opção evitando a formação de descargas ... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The use of atmospheric pressure plasmas for different purposes has increased in recent years. With the development of atmospheric pressure plasma jets, some precise treatments such as in the biomedical field or specific surface processing became more often. However, the delivery of plasma to irregular shaped objects, inside tubes or even hollow organs is limited with the use of conventional plasma jet configurations. Therefore, those limitations can be surpassed with the development of elongated or remotely generated plasma jets. In this work, two extended plasma jet configurations aiming at different application fields were further developed and characterized. Firstly, an endoscopic plasma jet (plasma endoscope) operating with a dielectric barrier discharge (DBD) configuration in millimeter dimensions that can be coupled to a typical endoscope was developed. This plasma jet can operate with helium or neon and counts with an external concentric shielding gas channel that provides the introduction of an electronegative gas curtain around the plasma plume. The shielding gas allows the preservation of the plasma jet shape when operated inside closed cavities. The construction difficulties arisen from the use of different feed and shielding gases were explored. Carbon dioxide was proven to be a good option for the curtain gas around the plasma plume avoiding the formation of parasitic discharges inside the shielding gas tube and the endoscopic housing. When operated with neon, th... (Complete abstract click electronic access below)
Doutor
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Cauche, Nicolas. "Conception et modélisation d'une plateforme flexible d'endoscopie digestive." Doctoral thesis, Universite Libre de Bruxelles, 2014. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/247639.

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Анотація:
Les endoscopes utilisés en gastro-entérologie ne permettent pas d’obtenir une réelle chirurgie dans le tube digestif en passant par les voies naturelles. Cette thèse a pour ambition de pallier ce manquement grâce au développement d’une plate-forme de triangulation universelle. Cette plateforme donne la possibilité au gastro-entérologue d’augmenter de manière significative ses possibilités thérapeutiques en lui permettant de réaliser des actes chirurgicaux de base tels que “soulever-couper” et “suturer” les tissus. Ces actes ne peuvent être réalisés qu’extrêmement difficilement avec les endoscopes conventionnels. Ils constituent pourtant les éléments essentiels en vue de traiter l’obésité morbide ou le traitement du reflux gastro-oesophagien par les voies naturelles. La caractéristique principale de la plate-forme développée dans cette thèse est son universalité lui permettant une utilisation avec pratiquement n’importe quel type d’endoscope et outils thérapeutiques existants sur le marché. La plate-forme a obtenu le marquage CE. Des études cliniques ont été réalisées avec cet instrument dans le cadre du traitement de l’obésité. Cette thèse comprend également une méthodologie de conception pour des guidages flexibles utilisés dans le domaine médical. Cette méthodologie basée sur l’élaboration d’abaques théoriques permet, d’une part, à partir des desiderata du médecin, d’identifier les paramètres externes (rigidité, longueur.) d’un guidage flexible et ce peu importe le type de guidage utilisé et, d’autre part, de déduire les paramètres internes associés à ces paramètres externes pour un type de guidage particulier: un élastomère renforcé par un ressort hélicoïdal. La méthode a été appliquée `a posteriori `a la plate-forme de triangulation et donne, dans ce cas, de bons résultats. Flexible endoscopes used in gastro-enterology do not allowed a real surgery in the gastrointestinal tract passing through natural orifices. This thesis aimed to overcome these limitations by developing a universal triangulation platform. This platform allows the gastro-enterologist to significantly increase his therapeutic possibilities by enabling him to perform basic surgical procedures such as "lifting-cutting" and "suturing" the tissues. These procedures can only be performed with extreme difficulty with conventional endoscopes. They are, however, the essential elements for the treatment of morbid obesity or gastroesophageal reflux through natural orifice. The main feature of the platform developed in this thesis is its universality allowing it to be used with any type of endoscopes and existing tools available on the market. The platform has obtained the CE marking. Clinical studies have been conducted with this instrument for treatment of obesity. This thesis includes also a design methodology for flexible guides used in the medical field. This methodology, based on the elaboration of theoretical abacuses, allows, firstly, from the physician's specifications, to identify the external parameters (rigidity, length .) of the flexible guide regardless of the type of the used guide. Secondly, it allows to determine the internal parameters associated with these external parameters for a particular type of guide: an elastomer reinforced by a helical spring. The method was applied a posteriori to the triangulation platform and, in this case, gives good results.
Doctorat en Sciences de l'ingénieur et technologie
info:eu-repo/semantics/nonPublished
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Choi, JungHun. "Design and Development of a Minimally Invasive Endoscope: Highly Flexible Stem with Large Deflection and Stiffenable Exoskeleton Structure." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/26218.

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Colonoscopy provides a minimally invasive tool for examining and treating the colon without surgery, but current endoscope designs still cause a degree of pain and injury to the colon wall. The most common colonoscopies are long tubes inserted through the rectum, with locomotion actuators, fiber optic lights, cameras, and biopsy tools on the distal end. The stiffness required to support these tools makes it difficult for the scopes to navigate the twisted path of the colon without damaging the inside wall of the colon or distorting its shape. In addition, little is known about how sharp and forceful endoscopes can be without accidentally cutting into tissue during navigation. In order to solve the requirements of stiffness (to support tools) and flexibility (to navigate turns), we expanded on a design by Zehel et al. [49], who proposed surrounding a flexible endoscope with an external exoskeleton structure, with controllable stiffness. The exoskeleton structure is comprised of rigid, articulating tubular units, which are stiffened or relaxed by four control cables. The stiffened or locked exoskeleton structure aids navigation and provides stability for the endoscope when it protrudes beyond the exoskeleton structure for examination and procedures. This research determined the design requirements of such an exoskeleton structure and simulated its behavior in a sigmoid colon model. To predict just how pointed an endoscope can be without damaging tissue under a given force, we extrapolated a strength model of the descending colon from published stress-strain curves of human colon tissue. Next we analyzed how friction, cable forces, and unit angles interact to hold the exoskeleton structure in a locked position. By creating two- and three-dimensional models of the exoskeleton structure, we optimized the dimensions of the units of an exoskeleton structure (diameter, thickness, and leg angle) and cable holders ( cable attachment location) to achieve the turns of the sigmoid colon, while still remaining lockable. Models also predicted the loss of force over the exoskeleton structure due to curving, further determining the required cable angles and friction between units. Finally we determined how the stiffness of the endoscope stem affected locking ability and wear inside the exoskeleton structure.
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Ducourthial, Guillaume. "Développement d'un endomicroscope multiphotonique compact et flexible pour l'imagerie in vivo haute résolution de tissus biologiques non marqués." Thesis, Limoges, 2014. http://www.theses.fr/2014LIMO0004/document.

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La microscopie multiphotonique est un outil essentiel d’investigation en biologie cellulaire et tissulaire. Son extension à l’endoscopie est l’objet d’intenses efforts de recherche pour des applications en neurosciences (imagerie cérébrale du petit animal) ou en clinique (diagnostic précoce, aide à la biopsie). Ce manuscrit porte sur le développement d’un endomicroscope multiphotonique présentant des performances inédites. Ce dispositif est alimenté par un oscillateur titane-saphir standard. Vient ensuite un module de pré-compensation des distorsions linéaires et non linéaires se produisant dans la fibre endoscopique. Ce module permet d’obtenir des impulsions compressées de 39 fs à la sortie d’une fibre microstructurée air-silice innovante à double gaine de 5 mètres de long qui est optimisée pour l’excitation multiphotonique (cœur central de 3,4 µm à maintien de polarisation) et la collection du signal produit par les cibles biologiques. A l’extrémité de la fibre, on trouve une sonde endoscopique, de 2,2 mm de diamètre pour 37 mm de long, composée d’un micro-scanner à fibre optique et d’un micro-objectif achromatique de distance de travail supérieure à 400 µm. La résolution spatiale de l’appareil vaut 0,83 µm et l’acquisition se fait en simultané sur deux canaux spectraux à 8 images/s. L’appareil a permis l’enregistrement d’images in vivo sans marquage des tubules et de la capsule rénale, respectivement par fluorescence à deux photons des flavines et par génération de second harmonique du collagène, avec 30 mW sur les tissus et jusqu’à 300 µm sous la surface de l’organe
Multiphoton microscopy is an essential investigative tool in cell and tissue biology. Its extension to endoscopy is the subject of intensive research for applications in neuroscience (brain imaging of small animals) or clinical (early diagnosis, help for biopsy). This manuscript focuses on the development of an endomicroscope with multiphoton unprecedented performance. This device is powered by a standard titanium-sapphire oscillator. Then comes a pre-compensation module of linear and nonlinear distortions occurring in the endoscopic fiber. This module provides compressed pulses of 39 fs at the direct output of 5 meters long innovative double-clad air-silica microstructured fiber which is optimized for multiphoton excitation (polarization maintaining central core of 3.4 µm) and the collection of the signal produced by biological targets. At the end of the fiber, there is an endoscopic probe, 2.2 mm in diameter and 37 mm long, composed of a micro fiber scanning system and an achromatic micro-objective with a working distance greater than 400 µm. The spatial resolution of the device is 0.83 µm and the acquisition is done simultaneously on two spectral channels at 8 frames/s. The device has recorded in vivo images without label of the tubules and the renal capsule, respectively by two-photon excitation fluorescence of flavins and second harmonic generation of collagen, with 30 mW on the tissues and 300 µm below the surface of the organ
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Книги з теми "Flexible endoscopy"

1

Marks, Jeffrey M., and Brian J. Dunkin, eds. Principles of Flexible Endoscopy for Surgeons. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-6330-6.

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Nau, Peter, Eric M. Pauli, Bryan J. Sandler, and Thadeus L. Trus, eds. The SAGES Manual of Flexible Endoscopy. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-23590-1.

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3

1943-, Murry Thomas, ed. FEESST: Flexible endoscopic evaluation of swallowing with sensory testing. San Diego: Plural Pub., 2005.

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Aviv, Jonathan E. FEESST: Flexible endoscopic evaluation of swallowing with sensory testing. San Diego, CA: Plural Pub., Inc., 2006.

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5

Marks, Jeffrey M., and Brian J. Dunkin. Principles of Flexible Endoscopy for Surgeons. Springer New York, 2017.

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Principles of Flexible Endoscopy for Surgeons. Springer, 2013.

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7

Marks, Jeffrey M., and Brian J. Dunkin. Principles of Flexible Endoscopy for Surgeons. Springer London, Limited, 2013.

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8

Singh, McPherson, Hopkins, Katherine van Wormer, Robert J. Kurman, Nadler, Hegde, et al. Flexible Endoscopy of the Urinary Tract. Quality Medical Publishing, 2003.

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9

Nau, Peter, Eric M. Pauli, Bryan J. Sandler, and Thadeus L. Trus. The SAGES Manual of Flexible Endoscopy. Springer, 2019.

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10

Systems, Inc Medical Support. Complications of Laparoscopy and Flexible Endoscopy: Postgraduate Course of the Annual Meeting of the Society of American Gastrointestinal Endoscopic. Springer, 1994.

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Частини книг з теми "Flexible endoscopy"

1

Sasada, Shinji. "Basic Flexible Bronchoscopy." In Respiratory Endoscopy, 91–102. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-287-916-5_14.

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Gulledge, Marialice, and A. Britton Christmas. "Flexible Intestinal Endoscopy." In Interventional Critical Care, 279–85. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-25286-5_30.

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3

Fanelli, Robert D. "Intraoperative Endoscopy." In Principles of Flexible Endoscopy for Surgeons, 167–81. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-6330-6_15.

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Sasada, Shinji. "Type and Selection of Flexible Bronchoscope." In Respiratory Endoscopy, 75–83. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-287-916-5_12.

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5

Waterhouse, Dale Jonathan. "Flexible Endoscopy: Device Architecture." In Springer Theses, 43–73. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-21481-4_3.

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Waterhouse, Dale Jonathan. "Flexible Endoscopy: Multispectral Imaging." In Springer Theses, 101–26. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-21481-4_5.

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7

Hoppo, Toshitaka, and Blair A. Jobe. "Techniques of Office-Based Endoscopy: Unsedated Transnasal Endoscopy." In Principles of Flexible Endoscopy for Surgeons, 201–13. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-6330-6_18.

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8

Hungness, Eric, and Ezra Teitelbaum. "Future of Endoscopy." In Principles of Flexible Endoscopy for Surgeons, 261–74. New York, NY: Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4614-6330-6_22.

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9

Davila, Daniel, Ramona Ilie, and Edward Lin. "Masters Program Flexible Endoscopy Pathway: Percutaneous Endoscopic Gastrotomy (PEG)." In The SAGES Manual of Flexible Endoscopy, 51–67. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-23590-1_4.

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10

Waterhouse, Dale Jonathan. "Flexible Endoscopy: Optical Molecular Imaging." In Springer Theses, 75–100. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-21481-4_4.

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Тези доповідей конференцій з теми "Flexible endoscopy"

1

Kogkas, K. K., B. Glover, N. Patel, A. Darzi, and G. P. Mylonas. "Gaze-contingent Robotic Flexible Endoscopy." In The Hamlyn Symposium on Medical Robotics. The Hamlyn Centre, Faculty of Engineering, Imperial College London, 2019. http://dx.doi.org/10.31256/hsmr2019.20.

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2

Lei, Yang, and Scott Miller. "Pose Estimation and Force Prediction of Non-Rigid Endoscopic Tool." In ASME 2010 International Manufacturing Science and Engineering Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/msec2010-34046.

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Endoscopy is useful for inspecting features in hard-to-reach cavities, such as the blades inside a turbine engine with a flexible body and a semi-rigid bending section. It is hypothesized that an endoscope can be used to grind a predetermined amount of material to smooth the cracks on turbine blades in those cavities. By turning control knobs on the endoscope, the bending section can access a workpiece on its lateral direction. In this research, two models are built to estimate the pose (position and orientation) and force on a modified PENTAX ES-3801 endoscope. The experimental and estimated results prove that the pose and force of the flexible bending section can be predicted and monitored when subjected to varying loads.
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Slawinski, Piotr R., Collin T. Garcia, Addisu Z. Taddese, Keith L. Obstein, and Pietro Valdastri. "Towards Recovering a Lost Degree of Freedom in Magnet-Driven Robotic Capsule Endoscopy." In 2017 Design of Medical Devices Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/dmd2017-3391.

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Flexible endoscopy, a procedure during which an operator pushes a semi-rigid endoscope through a patient’s gastrointestinal tract, has been the gold-standard screening method for colon cancer screening (colonoscopy) for over 50 years. Owing to the large amounts of tissue stress that result from the need for transmitting a force to the tip of the endoscope while the device wraps through the bowel, implementing a front-actuated endoscopy system has been a popular area of research [1]. The pursuit of such a concept was accelerated by the advent of ingestible capsule endoscopes, which, since then, have been augmented by researchers to include therapeutic capabilities, modalities for maneuverability, amongst other diagnostic functions [2]. One of the more common approaches investigated has been the use of magnetic fields to apply forces and torques to steer the tip of an endoscope [3]. Recent efforts in magnetic actuation have resulted in the use of robot manipulators with permanent magnets at their end effectors that are used to manipulate endoscopes with embedded permanent magnets. Recently, we implemented closed loop control of a tethered magnetic capsule by using real-time magnetic localization and the linearization of a magnetic wrench applied to the capsule by the actuating magnet [4]. This control was implemented in 2 degrees-of-freedom (DoF) in position (in the horizontal plane) and 2 DoF in orientation (panning and tilting). One DoF in position is lost owing to the tethered capsule being actuated in air and thus lacking a restoring force to counter the high field gradient. The 3rd orientation DoF is lost owing to the axial symmetry of the permanent magnet in the capsule; this prevents the application of torque in the axial direction and thus controlled roll and introduces a singularity in the capsule’s actuation. Although another dipole could be used to eliminate this singularity, this would complicate both the actuation and localization methods. In this manuscript, we consider the consequences of the embedded magnet (EM) being radially offset from the center of the capsule while being manipulated by an external actuating magnet (AM). We have developed a tethered capsule endoscope that contains a cylindrical EM (11.11 mm in length and diameter) with a residual flux density of 1.48 T that is offset by 1.85 mm from the center of the capsule; a distance that is less than 10% of the capsule diameter. Our investigation into the topic results from repeated observation of the capsule’s preference to align such that the internal magnet is closest to the actuating magnet (AM). The AM is a cylindrical magnet (101.6 mm in length and diameter) with a residual flux density of 1.48 T that is mounted at the end effector of a 6 DoF manipulator, as seen in Figure 1. In this manuscript, we evaluate the torqueing effects of the presence of this magnet offset with the goal of determining whether the torque effect is negligible, or impacts capsule motion and thus can potentially be used for the benefit of endoscope manipulation. A concept schematic of this effect is shown in Figure 2. A discussion of how to use this torque is beyond the scope of this manuscript. To the authors’ knowledge, the use of such concept in permanent-magnet based control has not been investigated.
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Munnae, Jomkwun, Gary McMurray, and Harvey Lipkin. "Static and Kinematic Analysis of a Planar Cable-Driven Flexible Endoscope." In ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-87542.

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Flexible endoscopes are mainly used for diagnostics and performing simple therapeutic tasks inside human cavities but are now becoming the key instrument for the incisionless surgery known as natural orifice transluminal endoscopic surgery (NOTES). Since the current endoscope technology gives limited maneuverability, dexterity, and functionality, a number of new endoscope designs have been proposed. Due to miniaturization, conduit, and actuation simplicity, many of the new designs rely on cable-actuating mechanisms similar to the current technology. Basic kinematical and static analyses for this device have not appeared in the literature. In this paper the articulated section of a planar cable-driven endoscope is modeled as a serial robot. The kinematic and static analyses for single-jointed and multi-jointed endoscope structures are performed to relate tip motion to the controlling inputs. Pre-tensioning cables increases the endoscope stiffness and extends its range of operation.
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Zheng Yin, Guolin Li, Xiang Xie, Yingke Gu, Jun Hu, Dan Wang, and Zhihua Wang. "A flexible attitude system for wireless Micro-Ball endoscopy." In 2012 IEEE Biomedical Circuits and Systems Conference (BioCAS 2012). IEEE, 2012. http://dx.doi.org/10.1109/biocas.2012.6418483.

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6

Ott, L., Ph Zanne, Fl Nageotte, M. de Mathelin, and J. Gangloff. "Physiological motion rejection in flexible endoscopy using visual servoing." In 2008 IEEE International Conference on Robotics and Automation (ICRA). IEEE, 2008. http://dx.doi.org/10.1109/robot.2008.4543654.

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7

Caravaca Mora, Oscar, Maxime Abah, Lucile Heroin, Guiqiu Liao, Zhongkai Zhang, Philippe Zanne, Benoit Rosa, et al. "OCT image-guidance of needle injection for robotized flexible interventional endoscopy." In Endoscopic Microscopy XVI, edited by Melissa J. Suter, Guillermo J. Tearney, and Thomas D. Wang. SPIE, 2021. http://dx.doi.org/10.1117/12.2576186.

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8

Ortega-Quijano, N., J. L. Arce-Diego, and F. Fanjul-Vélez. "Contrast limiting factors of optical fiber bundles for flexible endoscopy." In Photonics, Devices, and Systems IV, edited by Pavel Tománek, Dagmar Senderáková, and Miroslav Hrabovský. SPIE, 2008. http://dx.doi.org/10.1117/12.817981.

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9

Maeda, Yusaku, Kohei Maeda, Hideki Kobara, Hirohito Mori, and Hidekuni Takao. "A pressure/temperature sensor embedded in an endoscopy hood for intraluminal monitoring during flexible endoscopic operation." In 2015 IEEE Sensors. IEEE, 2015. http://dx.doi.org/10.1109/icsens.2015.7370372.

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10

Patel, Nisha, Alexandros Kogkas, Ara Darzi Ben Glover, and George Mylonas. "PTH-051 Eye gaze-controlled robotic flexible endoscopy: a feasibility study." In British Society of Gastroenterology Annual Meeting, 17–20 June 2019, Abstracts. BMJ Publishing Group Ltd and British Society of Gastroenterology, 2019. http://dx.doi.org/10.1136/gutjnl-2019-bsgabstracts.76.

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