The Experts below are selected from a list of 2112 Experts worldwide ranked by ideXlab platform
Olivier Traxer - One of the best experts on this subject based on the ideXlab platform.
-
Which Flexible Ureteroscope is the best for upper tract urothelial carcinoma treatment?
World Journal of Urology, 2019Co-Authors: Etienne Xavier Keller, Steeve Doizi, Luca Villa, Olivier TraxerAbstract:PurposeTo present attributes of currently available Flexible Ureteroscopes to define the best Flexible Ureteroscope for upper tract urothelial carcinoma (UTUC) treatment.Materials and methodsScopus and Medline databases were searched for articles relating to performance of Flexible Ureteroscopes. A consensus for final inclusion of articles judged to be relevant for UTUC treatment was reached between the authors. Instrument characteristics were extracted from manufacturers’ product brochures.ResultsSmaller cross-sectional size of instruments is associated with increased probability for successful primary access to the upper urinary tract. The smallest Flexible Ureteroscopes are fiberoptic scopes. Smaller Ureteroscopes also allow comparatively increased irrigation flow at constant intrarenal pressure. Digital Flexible Ureteroscopes achieve superior image quality compared to their fiberoptic counterparts, at the price of lower end-deflection ability. Image enhancement technologies such as narrow-band imaging (NBI), photodynamic diagnosis (PDD) and Image 1-S (formerly SPIES) are based on subjective image interpretation by the operator. NBI and PDD significantly increase tumor detection rate. The highest subjective image quality score of the Image 1-S technology is reached by the “Clara + Chroma” mode. Single-use Ureteroscopes offer potential advantages over reusable scopes, including sterility, absence of contamination, immediate availability and exemption of previous instrument wear.ConclusionsMiniaturization, digital image caption and image enhancement technologies seem to be the major determinants defining the best Flexible Ureteroscope for UTUC treatment. The impact of further factors, such as distal tip design, torque, working channel position, risk of contamination, as well as upcoming technological innovations should be evaluated in randomized controlled trials.
-
Which Flexible Ureteroscope is the best for upper tract urothelial carcinoma treatment
World journal of urology, 2019Co-Authors: Etienne Xavier Keller, Steeve Doizi, Luca Villa, Olivier TraxerAbstract:To present attributes of currently available Flexible Ureteroscopes to define the best Flexible Ureteroscope for upper tract urothelial carcinoma (UTUC) treatment. Scopus and Medline databases were searched for articles relating to performance of Flexible Ureteroscopes. A consensus for final inclusion of articles judged to be relevant for UTUC treatment was reached between the authors. Instrument characteristics were extracted from manufacturers’ product brochures. Smaller cross-sectional size of instruments is associated with increased probability for successful primary access to the upper urinary tract. The smallest Flexible Ureteroscopes are fiberoptic scopes. Smaller Ureteroscopes also allow comparatively increased irrigation flow at constant intrarenal pressure. Digital Flexible Ureteroscopes achieve superior image quality compared to their fiberoptic counterparts, at the price of lower end-deflection ability. Image enhancement technologies such as narrow-band imaging (NBI), photodynamic diagnosis (PDD) and Image 1-S (formerly SPIES) are based on subjective image interpretation by the operator. NBI and PDD significantly increase tumor detection rate. The highest subjective image quality score of the Image 1-S technology is reached by the “Clara + Chroma” mode. Single-use Ureteroscopes offer potential advantages over reusable scopes, including sterility, absence of contamination, immediate availability and exemption of previous instrument wear. Miniaturization, digital image caption and image enhancement technologies seem to be the major determinants defining the best Flexible Ureteroscope for UTUC treatment. The impact of further factors, such as distal tip design, torque, working channel position, risk of contamination, as well as upcoming technological innovations should be evaluated in randomized controlled trials.
-
Comparison of New Single-Use Digital Flexible Ureteroscope Versus Nondisposable Fiber Optic and Digital Ureteroscope in a Cadaveric Model
Journal of endourology, 2016Co-Authors: Steeve Doizi, Guido Giusti, Silvia Proietti, Laurian Dragos, Wilson R. Molina, Olivier TraxerAbstract:Abstract Purpose: To evaluate LithoVue, the new single-use digital Flexible Ureteroscope, in a human cadaveric model and compare it with a nondisposable fiber optic and digital Flexible Ureteroscopes. Materials and Methods: LithoVue, a conventional fiber optic, and digital Flexible Ureteroscopes were each tested in four renal units of recently deceased female cadavers by three surgeons. The following parameters were analyzed: accessibility to the kidney and navigation of the entire collecting system with and without ureteral access sheath (UAS), lower pole access measuring the deflection of the Ureteroscope with the working channel empty, and with inside two different baskets and laser fibers. A subjective evaluation of maneuverability and visibility was assessed by each surgeon at the end of every procedure. Results: Kidney access into the Renal unit 1 was not possible without UAS for all Ureteroscopes because of noncompliant ureter at the level of sacroiliac joint. The reusable digital Ureteroscope was ...
-
MP51-03 COMPARISON OF A NEW SINGLE-USE DIGITAL Flexible Ureteroscope (LITHOVUE TM) TO A NON-DISPOSABLE FIBRE-OPTIC Flexible Ureteroscope IN A LIVE PORCINE MODEL
The Journal of Urology, 2016Co-Authors: Oliver Wiseman, Olivier Traxer, Francis X. Keeley, Guido Giusti, Michael E. Lipkin, Glenn M. PremingerAbstract:INTRODUCTION AND OBJECTIVES: LithoVue TM is a new single use digital Flexible Ureteroscope. The aim of this study was to evaluate it compared to a standard fibre-optic Flexible Ureteroscope, with respect to image quality and maneuverability within a live porcine renal collecting system. METHODS: Flexible ureteroscopy was performed in three anaesthetised pigs by six experienced endourologists using fluoroscopic guidance and standard techniques with the Boston Scientific LithoVue TM disposable digital Flexible Ureteroscope and compared to an Olympus P5 TM fiber optic Flexible Ureteroscope. Each operator operated on one kidney, and attempted to access all areas of the collecting system either by accessing the kidney over a wire of via and access sheath or both. Passage of a 1.9Fr Escape TM or 1.9 or 3 Fr Fr Zero-tip TM basket and a 200 micron TracTip TM or Flexiva TM laser fibre was undertaken, and effect on deflection and visibility noted. Users were asked standard questions on completion, and also rated image quality of the LithoVue TM system compared to the P5. RESULTS: All operators were able to access all areas of the collecting system, and complete the schedule of tasks including passage of the basket and laser fibre through the Ureteroscope. Ureteroscope set up and use, access and navigation, image quality, field of view, depth of field, and lithotripsy compatibility were all rated as clinically acceptable. All operators answered the statement 0 The user was able to access, visualize, diagnose, and aid on the treatment of stones and conditions in the kidney, ureter and bladder better thanks or equal to the standard of care amongst current Flexible Ureteroscopes0 positively. When asked to compare the image quality of the LithoVue TM to the P5 , on a scale of 1 to 7, where 1 is superior P5 TM performance, 4 is similar performance, and 7 is superior LithoVue TM performance, operators gave a median score of 7, with a mean score of 6.86. CONCLUSIONS: The LithoVue TM single-use digital Flexible Ureteroscope gives excellent views of the collecting system when compared to a P5 TM fibre-optic Ureteroscope and is able to access all calyces in a porcine model, without significant loss of deflection or visibility with passage of a laser fibre or 1.9Fr basket. Further studies in humans are needed to determine the clinical utility of this new Ureteroscope.
-
the new olympus digital Flexible Ureteroscope urf v initial experience
Urology Annals, 2011Co-Authors: Saeed Alqahtani, Bogdan P Geavlette, Sixtina Gildiez De Medina, Olivier TraxerAbstract:Objective: Flexible ureterorenoscopes (FURSs) are considered important additions to urology armamentarium. One of the technical drawbacks is the poor optic image provided by fiberoptic endoscope as well as the fragility of this conventional fiberoptic endoscope. This study aim is to evaluate practical performances and functional durability of the new Olympus digital Flexible Ureteroscope (ODF-URS) (URF-V) in a single center clinical setting. Materials and Methods: A number of 60 diagnostic and therapeutic procedures were performed over a period of 6 months in a single center (Tenon University Hospital), using a single ODF-URS (URF-V). This device provided a 275˚ maximal down-deflection (MDD) and 180˚ maximal up-deflection (MUD). Results: ODF-URS (URF-V) was used for a total time of 90 h and 30 min, with average time duration of 90.5 min per procedure. After 60 procedures, MDD decreased from 275˚ to 217˚, while the MUD decreased from 180˚ to 161˚. During six procedures (10%), URF-V failed to access inferior calyx due to a narrow lower calyx infundibulum. Conclusion: New ODF-URS (URF-V) is a reliable and durable device, with a good success rate and improved functional parameters. It is a superior device compared to predecessor generations of conventional fiberoptic endoscopes for the light source and the image quality; however, randomized comparative studies are necessary to evaluate performances and durability of this device.
Kikuo Nutahara - One of the best experts on this subject based on the ideXlab platform.
-
evaluation of Flexible Ureteroscope with an omni directional bending tip using a joystick unit urf y0016 an ex vivo study
World Journal of Urology, 2021Co-Authors: Takaaki Inoue, M. Tambo, H Miura, S Okada, Junichi Matsuzaki, Shuzo Hamamoto, Hiroshi Fukuhara, Masato Fujisawa, Tadashi Matsuda, Kikuo NutaharaAbstract:Purpose To compare the range of reach of our newly designed omni-directional Ureteroscope (URF-Y0016), compared to the commonly used URF-P6, FlexX2s, and LithoVue™ scopes, in the upper, middle, and lower calyces in an ex-vivo pyelocaliceal model. Methods We fabricated a three-dimensional pyelocaliceal model of the upper, middle, and lower pole calyces using urethane and acrylic resin. The inner surface of the dome of each calyx was engraved with reference lines along eight directions, set at 10° of latitude from the top to the base of the dome, and at angles of 0-90°, to precisely determine the range of reach of each scope. The main feature of the URF-Y0016 scope is the omni-directional bending of the tip of the Flexible Ureteroscope, with the control of these four directions integrated into a handgun-type control unit with a joystick. The range of reach within each calyx was measured by four expert surgeons. Results The URF-Y0016 scope provided a greater range of reach along all directions in the lower pole calyx compared to URF-P6, FlexX2s, and LithoVue™ scopes (p Conclusion The novel design of the URF-Y0016 could improve treatment outcomes for calyceal stones in the lower pole in practice.
-
A Novel Flexible Ureteroscope with Omnidirectional Bending Tip Using Joystick-Type Control Unit (URF-Y0016): Initial Validation Study in Bench Models.
Journal of endourology, 2020Co-Authors: M. Tambo, Kikuo Nutahara, Takaaki Inoue, Hiroyasu Miura, Junichi Matsuzaki, Shuzo Hamamoto, Shinsuke Okada, Hiroshi Fukuhara, Masato Fujisawa, Tadashi MatsudaAbstract:Purpose: The conventional Flexible Ureteroscope has limited access into the lower calix and often causes biomechanical stress to surgeons. Recently, a novel Flexible Ureteroscope with an omnidirect...
-
pd07 02 initial evaluation of novel Flexible Ureteroscope with omni directional bending using joystick unit urf y0016 in ex vivo research
The Journal of Urology, 2020Co-Authors: Takaaki Inoue, Hiroyasu Miura, Junichi Matsuzaki, Shuzo Hamamoto, Shinsuke Okada, Masato Fujisawa, Tadashi Matsuda, Mitsuhiro Tanbo, Kikuo NutaharaAbstract:INTRODUCTION AND OBJECTIVE:The accessible range of a lower pole calyx according to retrograde ureteral access using a Flexible Ureteroscope with the usual two deflected directions is often limited....
-
Evaluation of Flexible Ureteroscope with an omni-directional bending tip, using a JOYSTICK unit (URF-Y0016): an ex-vivo study
World Journal of Urology, 2020Co-Authors: T. Inoue, Shinya Hamamoto, J. Matsuzaki, M. Tambo, H. Fukuhara, M Fujisawa, T. Matsuda, H Miura, S Okada, Kikuo NutaharaAbstract:Purpose To compare the range of reach of our newly designed omni-directional Ureteroscope (URF-Y0016), compared to the commonly used URF-P6, FlexX2s, and LithoVue™ scopes, in the upper, middle, and lower calyces in an ex-vivo pyelocaliceal model . Methods We fabricated a three-dimensional pyelocaliceal model of the upper, middle, and lower pole calyces using urethane and acrylic resin. The inner surface of the dome of each calyx was engraved with reference lines along eight directions, set at 10° of latitude from the top to the base of the dome, and at angles of 0–90°, to precisely determine the range of reach of each scope. The main feature of the URF-Y0016 scope is the omni-directional bending of the tip of the Flexible Ureteroscope, with the control of these four directions integrated into a handgun-type control unit with a joystick. The range of reach within each calyx was measured by four expert surgeons. Results The URF-Y0016 scope provided a greater range of reach along all directions in the lower pole calyx compared to URF-P6, FlexX2s, and LithoVue™ scopes ( p
Takaaki Inoue - One of the best experts on this subject based on the ideXlab platform.
-
evaluation of Flexible Ureteroscope with an omni directional bending tip using a joystick unit urf y0016 an ex vivo study
World Journal of Urology, 2021Co-Authors: Takaaki Inoue, M. Tambo, H Miura, S Okada, Junichi Matsuzaki, Shuzo Hamamoto, Hiroshi Fukuhara, Masato Fujisawa, Tadashi Matsuda, Kikuo NutaharaAbstract:Purpose To compare the range of reach of our newly designed omni-directional Ureteroscope (URF-Y0016), compared to the commonly used URF-P6, FlexX2s, and LithoVue™ scopes, in the upper, middle, and lower calyces in an ex-vivo pyelocaliceal model. Methods We fabricated a three-dimensional pyelocaliceal model of the upper, middle, and lower pole calyces using urethane and acrylic resin. The inner surface of the dome of each calyx was engraved with reference lines along eight directions, set at 10° of latitude from the top to the base of the dome, and at angles of 0-90°, to precisely determine the range of reach of each scope. The main feature of the URF-Y0016 scope is the omni-directional bending of the tip of the Flexible Ureteroscope, with the control of these four directions integrated into a handgun-type control unit with a joystick. The range of reach within each calyx was measured by four expert surgeons. Results The URF-Y0016 scope provided a greater range of reach along all directions in the lower pole calyx compared to URF-P6, FlexX2s, and LithoVue™ scopes (p Conclusion The novel design of the URF-Y0016 could improve treatment outcomes for calyceal stones in the lower pole in practice.
-
A Novel Flexible Ureteroscope with Omnidirectional Bending Tip Using Joystick-Type Control Unit (URF-Y0016): Initial Validation Study in Bench Models.
Journal of endourology, 2020Co-Authors: M. Tambo, Kikuo Nutahara, Takaaki Inoue, Hiroyasu Miura, Junichi Matsuzaki, Shuzo Hamamoto, Shinsuke Okada, Hiroshi Fukuhara, Masato Fujisawa, Tadashi MatsudaAbstract:Purpose: The conventional Flexible Ureteroscope has limited access into the lower calix and often causes biomechanical stress to surgeons. Recently, a novel Flexible Ureteroscope with an omnidirect...
-
pd07 02 initial evaluation of novel Flexible Ureteroscope with omni directional bending using joystick unit urf y0016 in ex vivo research
The Journal of Urology, 2020Co-Authors: Takaaki Inoue, Hiroyasu Miura, Junichi Matsuzaki, Shuzo Hamamoto, Shinsuke Okada, Masato Fujisawa, Tadashi Matsuda, Mitsuhiro Tanbo, Kikuo NutaharaAbstract:INTRODUCTION AND OBJECTIVE:The accessible range of a lower pole calyx according to retrograde ureteral access using a Flexible Ureteroscope with the usual two deflected directions is often limited....
-
Change in irrigation flow through a Flexible Ureteroscope with various devices in the working channel: Comparison between an automatic irrigation pump and gravity‐based irrigation
International Journal of Urology, 2020Co-Authors: Takaaki Inoue, Shuzo Hamamoto, Shinsuke Okada, Fukashi Yamamichi, Masato FujisawaAbstract:OBJECTIVES To evaluate the change in the irrigation flow with various instruments in the working channel of a Flexible Ureteroscope by two automatic irrigation pumps and gravity-based irrigation in an ex vivo setting. METHODS We used two automatic irrigation pumps: the Endoflow II and the UROMAT Endoscopic Automatic System for Irrigation and gravity-based irrigation. A Flexible Ureteroscope was connected to an irrigation tube with a working channel. The other side of the irrigation tube was attached to each automatic irrigation pump, which was connected with a 2-L saline bag or to a 2-L saline bag directly in case of gravity pressure. The flow volume from the working channel was measured three times for 30 s at various irrigation pressure settings, both when the working channel was unoccupied and occupied with various instruments. RESULTS The irrigation flow steadily increased as the irrigation pressure in the automatic irrigation pumps increased and the saline position in gravity became higher (P
-
change in irrigation flow through a Flexible Ureteroscope with various devices in the working channel comparison between an automatic irrigation pump and gravity based irrigation
International Journal of Urology, 2020Co-Authors: Takaaki Inoue, Shuzo Hamamoto, Shinsuke Okada, Fukashi Yamamichi, Masato FujisawaAbstract:OBJECTIVES To evaluate the change in the irrigation flow with various instruments in the working channel of a Flexible Ureteroscope by two automatic irrigation pumps and gravity-based irrigation in an ex vivo setting. METHODS We used two automatic irrigation pumps: the Endoflow II and the UROMAT Endoscopic Automatic System for Irrigation and gravity-based irrigation. A Flexible Ureteroscope was connected to an irrigation tube with a working channel. The other side of the irrigation tube was attached to each automatic irrigation pump, which was connected with a 2-L saline bag or to a 2-L saline bag directly in case of gravity pressure. The flow volume from the working channel was measured three times for 30 s at various irrigation pressure settings, both when the working channel was unoccupied and occupied with various instruments. RESULTS The irrigation flow steadily increased as the irrigation pressure in the automatic irrigation pumps increased and the saline position in gravity became higher (P < 0.05). However, the flow decreased as the size of the instrument in the working channel increased (P < 0.05). The efficiency of irrigation flow in gravity-based irrigation under the same pressure is significantly lower than one of two automatic irrigation pumps (P < 0.05). However, there was no significant difference in the efficiency of the irrigation flow between the Endoflow II and UROMAT Endoscopic Automatic System for Irrigation. The irrigation pressure setting needed to change to maintain adequate irrigation flow when using various working tools. CONCLUSIONS The efficiency of irrigation flow in gravity-based irrigation is significantly lower than one of two automatic irrigation pumps. The irrigation flow decreases as the size of the instrument in the working channel increases.
Steeve Doizi - One of the best experts on this subject based on the ideXlab platform.
-
Which Flexible Ureteroscope is the best for upper tract urothelial carcinoma treatment?
World Journal of Urology, 2019Co-Authors: Etienne Xavier Keller, Steeve Doizi, Luca Villa, Olivier TraxerAbstract:PurposeTo present attributes of currently available Flexible Ureteroscopes to define the best Flexible Ureteroscope for upper tract urothelial carcinoma (UTUC) treatment.Materials and methodsScopus and Medline databases were searched for articles relating to performance of Flexible Ureteroscopes. A consensus for final inclusion of articles judged to be relevant for UTUC treatment was reached between the authors. Instrument characteristics were extracted from manufacturers’ product brochures.ResultsSmaller cross-sectional size of instruments is associated with increased probability for successful primary access to the upper urinary tract. The smallest Flexible Ureteroscopes are fiberoptic scopes. Smaller Ureteroscopes also allow comparatively increased irrigation flow at constant intrarenal pressure. Digital Flexible Ureteroscopes achieve superior image quality compared to their fiberoptic counterparts, at the price of lower end-deflection ability. Image enhancement technologies such as narrow-band imaging (NBI), photodynamic diagnosis (PDD) and Image 1-S (formerly SPIES) are based on subjective image interpretation by the operator. NBI and PDD significantly increase tumor detection rate. The highest subjective image quality score of the Image 1-S technology is reached by the “Clara + Chroma” mode. Single-use Ureteroscopes offer potential advantages over reusable scopes, including sterility, absence of contamination, immediate availability and exemption of previous instrument wear.ConclusionsMiniaturization, digital image caption and image enhancement technologies seem to be the major determinants defining the best Flexible Ureteroscope for UTUC treatment. The impact of further factors, such as distal tip design, torque, working channel position, risk of contamination, as well as upcoming technological innovations should be evaluated in randomized controlled trials.
-
Which Flexible Ureteroscope is the best for upper tract urothelial carcinoma treatment
World journal of urology, 2019Co-Authors: Etienne Xavier Keller, Steeve Doizi, Luca Villa, Olivier TraxerAbstract:To present attributes of currently available Flexible Ureteroscopes to define the best Flexible Ureteroscope for upper tract urothelial carcinoma (UTUC) treatment. Scopus and Medline databases were searched for articles relating to performance of Flexible Ureteroscopes. A consensus for final inclusion of articles judged to be relevant for UTUC treatment was reached between the authors. Instrument characteristics were extracted from manufacturers’ product brochures. Smaller cross-sectional size of instruments is associated with increased probability for successful primary access to the upper urinary tract. The smallest Flexible Ureteroscopes are fiberoptic scopes. Smaller Ureteroscopes also allow comparatively increased irrigation flow at constant intrarenal pressure. Digital Flexible Ureteroscopes achieve superior image quality compared to their fiberoptic counterparts, at the price of lower end-deflection ability. Image enhancement technologies such as narrow-band imaging (NBI), photodynamic diagnosis (PDD) and Image 1-S (formerly SPIES) are based on subjective image interpretation by the operator. NBI and PDD significantly increase tumor detection rate. The highest subjective image quality score of the Image 1-S technology is reached by the “Clara + Chroma” mode. Single-use Ureteroscopes offer potential advantages over reusable scopes, including sterility, absence of contamination, immediate availability and exemption of previous instrument wear. Miniaturization, digital image caption and image enhancement technologies seem to be the major determinants defining the best Flexible Ureteroscope for UTUC treatment. The impact of further factors, such as distal tip design, torque, working channel position, risk of contamination, as well as upcoming technological innovations should be evaluated in randomized controlled trials.
-
a clinical evaluation of the new digital single use Flexible Ureteroscope uscopepu3022 an international prospective multicentered study
Central European Journal of Urology 1\ 2010, 2018Co-Authors: Thomas J Johnston, Steeve Doizi, Guido Giusti, Thomas Knoll, Silvia Proietti, Esteban Emiliani, Joyce Baard, Jean De La Rosette, Marianne Brehmer, Daniel PerezfentesAbstract:Introduction We assessed the clinical performance of a new digital single-use Flexible Ureteroscope (UscopePU3022). Material and methods A prospective cohort study was carried out across 11 centers (July-Oct. 2017). The UscopePU3022 was assessed regarding ease of insertion; deflection, image quality, maneuverability and overall performance using either a visual analog* or Likert scale. Results A total of 56 procedures were performed in 11 centers (16 surgeons) with the indication being renal stones in 83%. The median score for ease of scope insertion was 10 (3-10). Intraoperative maneuverability was rated as 'good' in 38% and 'very good' in 52%. Visual quality was rated as 'poor or bad' in 18%, 'fair' in 37% and 'good or very good' in 43%. Two scopes failed intraoperatively (4%). Preoperative and postoperative median upward and downward deflection was 270 degrees. Compared to standard Flexible ureteroscopy (f-URS) maneuverability was rated as 'equivalent' in 30% and 'better' in 60%; visual quality was 'worse' in 38% and 'equivalent or better' in 62%; limb fatigue scores were 'better' in 86%; and overall performance was 'worse' in 55% and 'equivalent or better' in 45%. Conclusions UscopeTM3022 performed well with regards to maneuverability, deflection and limb fatigue and appears to be at least non-inferior to standard f-URS with regards to these parameters. Poor image quality is a concern for UscopePU3022 with it receiving a low overall performance rating when compared to standard f-URS. Despite this it scored highly when investigators were asked if they would use it in their practice if it was cost-effective to do so.
-
First clinical evaluation of a new single-use Flexible Ureteroscope (LithoVue™): a European prospective multicentric feasibility study
World Journal of Urology, 2017Co-Authors: Steeve Doizi, Guido Giusti, Kim Hovgaard Andreassen, Thomas Knoll, Palle Jørn Sloth Osther, Cesare Marco Scoffone, Daniel Pérez-fentes, Silvia Proietti, Guido Kamphuis, Oliver WisemanAbstract:Introduction We evaluated a new digital single-use Flexible Ureteroscope, LithoVue™ with respect to deflection, image quality and maneuverability. Methods A prospective cohort study was conducted in eight tertiary reference centers in Europe in December 2015 and January 2016. All consecutive patients included underwent Flexible ureteroscopy and were 18 years or older. Deflection and image quality pre- and post-use and maneuverability were rated with a Likert scale. Results A total of 40 procedures were performed (five per institution). The indication for FURS was treatment of renal stones in 92.5 % of the cases. Before LithoVue™ usage, the median measured upward and downward deflections were both 270°. Image quality was rated as “very good” in 65 % of cases and “good” in 30 %. Maneuverability was “very good” in 77.5 % and “good” in 17.5 %. At the final evaluation, median upward and downward deflections were both 270°. Image quality was still “very good” in 65 % of cases and “good” in 30 % with no significant difference compared with preoperative data ( p = 1). Maneuverability was “very good” in 72.5 % and “good” in 17.5 %, with no significant difference compared with preoperative data ( p = 0.92). Two LithoVue™ broke during surgery (5 %): one occurring in extreme deflection with acute infundibulopelvic angle and spontaneous loss of vision for the second one. Conclusion The LithoVue™ displayed good image quality, active deflection and maneuverability. Further evaluation of surgical outcomes and cost analysis will help to present the best utility of this single-use FURS in current practice.
-
First clinical evaluation of a new single-use Flexible Ureteroscope (LithoVue™): a European prospective multicentric feasibility study
World journal of urology, 2016Co-Authors: Steeve Doizi, Guido Giusti, Guido M. Kamphuis, Kim Hovgaard Andreassen, Thomas Knoll, Palle Jørn Sloth Osther, Cesare Marco Scoffone, Daniel Pérez-fentes, Silvia Proietti, Oliver WisemanAbstract:Introduction We evaluated a new digital single-use Flexible Ureteroscope, LithoVue™ with respect to deflection, image quality and maneuverability.
Shuzo Hamamoto - One of the best experts on this subject based on the ideXlab platform.
-
evaluation of Flexible Ureteroscope with an omni directional bending tip using a joystick unit urf y0016 an ex vivo study
World Journal of Urology, 2021Co-Authors: Takaaki Inoue, M. Tambo, H Miura, S Okada, Junichi Matsuzaki, Shuzo Hamamoto, Hiroshi Fukuhara, Masato Fujisawa, Tadashi Matsuda, Kikuo NutaharaAbstract:Purpose To compare the range of reach of our newly designed omni-directional Ureteroscope (URF-Y0016), compared to the commonly used URF-P6, FlexX2s, and LithoVue™ scopes, in the upper, middle, and lower calyces in an ex-vivo pyelocaliceal model. Methods We fabricated a three-dimensional pyelocaliceal model of the upper, middle, and lower pole calyces using urethane and acrylic resin. The inner surface of the dome of each calyx was engraved with reference lines along eight directions, set at 10° of latitude from the top to the base of the dome, and at angles of 0-90°, to precisely determine the range of reach of each scope. The main feature of the URF-Y0016 scope is the omni-directional bending of the tip of the Flexible Ureteroscope, with the control of these four directions integrated into a handgun-type control unit with a joystick. The range of reach within each calyx was measured by four expert surgeons. Results The URF-Y0016 scope provided a greater range of reach along all directions in the lower pole calyx compared to URF-P6, FlexX2s, and LithoVue™ scopes (p Conclusion The novel design of the URF-Y0016 could improve treatment outcomes for calyceal stones in the lower pole in practice.
-
A Novel Flexible Ureteroscope with Omnidirectional Bending Tip Using Joystick-Type Control Unit (URF-Y0016): Initial Validation Study in Bench Models.
Journal of endourology, 2020Co-Authors: M. Tambo, Kikuo Nutahara, Takaaki Inoue, Hiroyasu Miura, Junichi Matsuzaki, Shuzo Hamamoto, Shinsuke Okada, Hiroshi Fukuhara, Masato Fujisawa, Tadashi MatsudaAbstract:Purpose: The conventional Flexible Ureteroscope has limited access into the lower calix and often causes biomechanical stress to surgeons. Recently, a novel Flexible Ureteroscope with an omnidirect...
-
pd07 02 initial evaluation of novel Flexible Ureteroscope with omni directional bending using joystick unit urf y0016 in ex vivo research
The Journal of Urology, 2020Co-Authors: Takaaki Inoue, Hiroyasu Miura, Junichi Matsuzaki, Shuzo Hamamoto, Shinsuke Okada, Masato Fujisawa, Tadashi Matsuda, Mitsuhiro Tanbo, Kikuo NutaharaAbstract:INTRODUCTION AND OBJECTIVE:The accessible range of a lower pole calyx according to retrograde ureteral access using a Flexible Ureteroscope with the usual two deflected directions is often limited....
-
Change in irrigation flow through a Flexible Ureteroscope with various devices in the working channel: Comparison between an automatic irrigation pump and gravity‐based irrigation
International Journal of Urology, 2020Co-Authors: Takaaki Inoue, Shuzo Hamamoto, Shinsuke Okada, Fukashi Yamamichi, Masato FujisawaAbstract:OBJECTIVES To evaluate the change in the irrigation flow with various instruments in the working channel of a Flexible Ureteroscope by two automatic irrigation pumps and gravity-based irrigation in an ex vivo setting. METHODS We used two automatic irrigation pumps: the Endoflow II and the UROMAT Endoscopic Automatic System for Irrigation and gravity-based irrigation. A Flexible Ureteroscope was connected to an irrigation tube with a working channel. The other side of the irrigation tube was attached to each automatic irrigation pump, which was connected with a 2-L saline bag or to a 2-L saline bag directly in case of gravity pressure. The flow volume from the working channel was measured three times for 30 s at various irrigation pressure settings, both when the working channel was unoccupied and occupied with various instruments. RESULTS The irrigation flow steadily increased as the irrigation pressure in the automatic irrigation pumps increased and the saline position in gravity became higher (P
-
change in irrigation flow through a Flexible Ureteroscope with various devices in the working channel comparison between an automatic irrigation pump and gravity based irrigation
International Journal of Urology, 2020Co-Authors: Takaaki Inoue, Shuzo Hamamoto, Shinsuke Okada, Fukashi Yamamichi, Masato FujisawaAbstract:OBJECTIVES To evaluate the change in the irrigation flow with various instruments in the working channel of a Flexible Ureteroscope by two automatic irrigation pumps and gravity-based irrigation in an ex vivo setting. METHODS We used two automatic irrigation pumps: the Endoflow II and the UROMAT Endoscopic Automatic System for Irrigation and gravity-based irrigation. A Flexible Ureteroscope was connected to an irrigation tube with a working channel. The other side of the irrigation tube was attached to each automatic irrigation pump, which was connected with a 2-L saline bag or to a 2-L saline bag directly in case of gravity pressure. The flow volume from the working channel was measured three times for 30 s at various irrigation pressure settings, both when the working channel was unoccupied and occupied with various instruments. RESULTS The irrigation flow steadily increased as the irrigation pressure in the automatic irrigation pumps increased and the saline position in gravity became higher (P < 0.05). However, the flow decreased as the size of the instrument in the working channel increased (P < 0.05). The efficiency of irrigation flow in gravity-based irrigation under the same pressure is significantly lower than one of two automatic irrigation pumps (P < 0.05). However, there was no significant difference in the efficiency of the irrigation flow between the Endoflow II and UROMAT Endoscopic Automatic System for Irrigation. The irrigation pressure setting needed to change to maintain adequate irrigation flow when using various working tools. CONCLUSIONS The efficiency of irrigation flow in gravity-based irrigation is significantly lower than one of two automatic irrigation pumps. The irrigation flow decreases as the size of the instrument in the working channel increases.