Some Pulse Types Are More Equal Than Others: A Comparison Of Different Pulse Modulation Modes For Holmium:Yag Laser Lithotripsy Ablation In A Benchtop Model

You have accessJournal of UrologyStone Disease: Surgical Therapy V (MP65)1 Sep 2021MP65-08 SOME PULSE TYPES ARE MORE EQUAL THAN OTHERS: A COMPARISON OF DIFFERENT PULSE MODULATION MODES FOR HOLMIUM:YAG LASER LITHOTRIPSY ABLATION IN A BENCHTOP MODEL Russell Terry, Gainesville FL, Derek Ho, Dominick Scialabba, Patrick Whelan, Robert Qi, Christian Tabib, Brian Ketterman, Christopher Kim, Glenn Preminger, Pei Zhong, and Michael Lipkin Russell TerryRussell Terry More articles by this author , Gainesville FLGainesville FL More articles by this author , Derek HoDerek Ho More articles by this author , Dominick ScialabbaDominick Scialabba More articles by this author , Patrick WhelanPatrick Whelan More articles by this author , Robert QiRobert Qi More articles by this author , Christian TabibChristian Tabib More articles by this author , Brian KettermanBrian Ketterman More articles by this author , Christopher KimChristopher Kim More articles by this author , Glenn PremingerGlenn Preminger More articles by this author , Pei ZhongPei Zhong More articles by this author , and Michael LipkinMichael Lipkin More articles by this author View All Author Informationhttps://doi.org/10.1097/JU.0000000000002105.08AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract INTRODUCTION AND OBJECTIVE: It is widely recognized that varying Holmium:YAG (Ho:YAG) laser parameters such as pulse energy, frequency, and duration can impact laser lithotripsy ablation efficiency. In 2017, Lumenis introduced Moses™ Technology which uses pulse modulation to enhance the delivery of energy from fiber to stone and to minimize retropulsion. Since the introduction of Moses™ Technology, other companies have brought additional pulse modulation concepts to market. The purpose of this in vitro study is to compare the pulse characteristics and stone ablation efficiency of Lumenis' Moses™ Technology with Quanta’s Vapor Tunnel™. METHODS: Submerged BegoStone phantoms were systematically ablated using either the Lumenis MOSES™Pulse 120H or the Quanta Litho 100 clinical laser system. Two pulse energies (0.4 J and 1 J), three fiber-stone standoff distances (0.5, 1, 2 mm), and all available pulse duration and modulation modes for each laser were tested in combination. The fiber speed was adjusted to scan across the stone surface at either 1 pulse/mm or 10 pulses/mm to form single pulse craters or an ablation trough, respectively. Volumes of single craters and 1 mm trough segments were imaged and quantified using optical coherence tomography. RESULTS: Ablation volumes increased with higher pulse energy and shorter standoff distance. Among pulse modulation modes, Moses Distance was superior at 0.5 mm in all testing and at 2 mm in trough testing. Vapor Tunnel was superior in 2 mm single crater testing and demonstrated similar crater depth at all distances. Quanta Long Pulse was the only modality at 0.4 J that had an ablation volume at 2 mm. All modulated pulses performed similarly at 1 mm. CONCLUSIONS: In this benchtop model of laser lithotripsy, stone ablation was significantly impacted by pulse type. Moses Distance demonstrated superior or non-inferior stone ablation at all tested parameters. Vapor Tunnel maintained its efficacy the best as standoff distance increased. Source of Funding: None © 2021 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 206Issue Supplement 3September 2021Page: e1121-e1122 Advertisement Copyright & Permissions© 2021 by American Urological Association Education and Research, Inc.MetricsAuthor Information Russell Terry More articles by this author Gainesville FL More articles by this author Derek Ho More articles by this author Dominick Scialabba More articles by this author Patrick Whelan More articles by this author Robert Qi More articles by this author Christian Tabib More articles by this author Brian Ketterman More articles by this author Christopher Kim More articles by this author Glenn Preminger More articles by this author Pei Zhong More articles by this author Michael Lipkin More articles by this author Expand All Advertisement Loading ...