Stone retropulsion rates of a 100W pulse-modulated Holmium:YAG laser

Thomas C. Hasenberg; Sanwei Liu; Longquan Chen; Isha Parab; Jasmine Cancino; Aditi Ray; Jian James Zhang; Tim Harrah; Bingyuan Yang; Ben Turney; Hyun Wook Kang

doi:10.1117/12.2578996

5 March 2021 Stone retropulsion rates of a 100W pulse-modulated Holmium:YAG laser

Thomas C. Hasenberg, Sanwei Liu, Longquan Chen, Isha Parab, Jasmine Cancino, Aditi Ray, Jian James Zhang, Tim Harrah, Bingyuan Yang, Ben Turney, Hyun Wook Kang

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Proceedings Volume 11619, Advanced Photonics in Urology; 116190A (2021) https://doi.org/10.1117/12.2578996
Event: SPIE BiOS, 2021, Online Only

Abstract

Stone retropulsion during laser lithotripsy results from various physical phenomena such as recoil momentum, bubble dynamics, and subsequent jet formation. Considerable stone retropulsion has been observed whereby the optical energy is converted into both mechanical and thermal energy as a distinctive bubble generation and collapse. It is hypothesized that by reducing the peak power and lengthening the pulse duration, we can reduce this conversion of optical energy into mechanical energy. This should maximize the thermal effects on the stone leading to enhanced ablation efficiency as well as less stone “chasing”. We are reporting on a new prototype Holmium laser with low pulse power and long temporal pulse durations in an attempt to minimize stone retropulsion.

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Thomas C. Hasenberg, Sanwei Liu, Longquan Chen, Isha Parab, Jasmine Cancino, Aditi Ray, Jian James Zhang, Tim Harrah, Bingyuan Yang, Ben Turney, and Hyun Wook Kang "Stone retropulsion rates of a 100W pulse-modulated Holmium:YAG laser", Proc. SPIE 11619, Advanced Photonics in Urology, 116190A (5 March 2021); https://doi.org/10.1117/12.2578996

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KEYWORDS

Laser lithotripsy

Laser therapeutics

Laser ablation

Prototyping

Pulsed laser operation

Modulation

Physical phenomena

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