MP46-18 DOES SHEATH SIZE MATTER: BENCHTOP COMPARISON OF FLOW AND PRESSURE ACROSS VARIETY OF CONTINUOUS FLOW ENDOSCOPES

You have accessJournal of UrologyBenign Prostatic Hyperplasia: Surgical Therapy & New Technology III (MP46)1 May 2024MP46-18 DOES SHEATH SIZE MATTER: BENCHTOP COMPARISON OF FLOW AND PRESSURE ACROSS VARIETY OF CONTINUOUS FLOW ENDOSCOPES Vishnuvardhan Ganesan, Michael Borofsky, and Deepak Agarwal Vishnuvardhan GanesanVishnuvardhan Ganesan , Michael BorofskyMichael Borofsky , and Deepak AgarwalDeepak Agarwal View All Author Informationhttps://doi.org/10.1097/01.JU.0001008668.53858.38.18AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract INTRODUCTION AND OBJECTIVE: Laser enucleation utilizes purpose built endoscopes for laser stabilization and continuous flow. We sought to evaluate sheath sizes on irrigation flow and intravesical pressure to help guide sheath selection optimizing visualization and success of voiding trials. METHODS: Two laser-endoscopes were assessed (Karl Storz and Richard Wolf). Five outer/inner sheath combinations were measured: A benchtop model using a silicone bladder model and a urodynamics pressure transuducer was used. The in-flow was 60cmH2O gravity irrigation and outflow drained into uroflowmetry device. Four 1-minute trials were recorded for each sheath. RESULTS: A total of 20 trials were performed. The Storz scope with the 28F outer and 26F inner sheath had the highest outflow (12.4±0.5 mL/s, p<0.01). The Wolf scope with the 24F outer and 22F inner had the lowest outflow (7.0±0.0 mL/s, p<0.01), Figure 1a. The steady state pressure was the lowest in the Storz scope with 28F outer and 26F inner sheath (1.5±1.7 cm H2O, p<0.01)) and the greatest in the Storz scope with 26F inner and 26F outer sheath (24.2±1.9 cm H2O, p<0.01), Figure 1b. CONCLUSIONS: The Storz 28/26 combination had best out-flow rate and lowest intravesical pressures in our study. Flow rates generally decreased and pressures increased with smaller sheath sizes. Download PPT Source of Funding: None © 2024 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 211Issue 5SMay 2024Page: e760 Advertisement Copyright & Permissions© 2024 by American Urological Association Education and Research, Inc.Metrics Author Information Vishnuvardhan Ganesan More articles by this author Michael Borofsky More articles by this author Deepak Agarwal More articles by this author Expand All Advertisement PDF downloadLoading ...