V05-06 EXPLORING THE PARAMETERS AFFECTING STONE ATTRACTION IN HOLMIUM LASER LITHOTRIPSY: A VIDEO ANALYSIS

You have accessJournal of UrologyUrolithiasis & Endourology (V05)1 Sep 2021V05-06 EXPLORING THE PARAMETERS AFFECTING STONE ATTRACTION IN HOLMIUM LASER LITHOTRIPSY: A VIDEO ANALYSIS Nikta R. Khajeh, Timothy L. Hall, William W. Roberts, and Khurshid Ghani KhajehNikta Khajeh More articles by this author , HallTimothy Hall RobertsWilliam Roberts GhaniKhurshid View All Author Informationhttps://doi.org/10.1097/JU.0000000000002012.06AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract INTRODUCTION AND OBJECTIVE: Holmium laser lithotripsy transmits energy stone through vapor bubbles that undergo expansion collapse which can cause movement. While retropulsion has been well studied, movement the towards fiber tip - attraction is poorly understood. We sought use high-speed video analysis better understand principles how it affected position on stone, distance from pulse mode settings. METHODS: An in vitro horizontal ureteral model with a 5 mm inner diameter was utilized 3 spherical BegoStones (15:6). (P120, Lumenis) 230-um core were used deliver single 1 J for all trials (n=3) without irrigation. assessed: (1) Fiber position: centered or above (2) distance: 2, 4, 6 away (3) Pulse mode: short (SP) Moses Contact (MC. Photron SA1.1 camera capture videos at 30000 fps measure travel distance. The fiber(mm) measured (%) stone’s starting calculated. also assessed cylindrical shaped Begostones. RESULTS: When positioned SP demonstrated more compared MC 2 (SP=4.0 mm, MC=1.3 200% vs. 83%; p=0.001) 6-mm (SP=1.8 31% 22%; p=0.05) distances. center both exhibited no seen. At 4 distance, MC=0.5 46% 12%; p=0.03). However, (MC=3.0 SP=2.0 51% 34%; p=0.01). Overall, greatest occurred when utilizing mode. No observed stones. CONCLUSIONS: Stone an impacted position, shape. effective closer distances stone. further Future studies using multiple pulses range irrigation conditions are needed fully best control manipulate fragments. Source Funding: Boston Scientific © 2021 American Urological Association Education Research, Inc.FiguresReferencesRelatedDetails Volume 206Issue Supplement 3September 2021Page: e387-e388 Advertisement Copyright Permissions© Inc.MetricsAuthor Information Expand Loading ...