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Stone retropulsion is an inevitable side effect of laser lithotripsy. It is generally considered undesirable but can also be beneficial in techniques such as “popdusting”. It is often described by a single parameter such as a distance moved, which might not correlate with the degree to which retropulsion interferes with clinical use. We report on a novel method of measuring retropulsion in vitro using high-speed video photography to describe the stone trajectory across multiple parameters, and present results from a range of laser systems. Describing the nature of this movement may help explain how some types of retropulsion are considered clinically disruptive and others are not.
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Bingyuan Yang, Jian J. Zhang, Aditi Ray, Ben Turney, "Analysis of stone trajectory during laser lithotripsy: an in vitro study," Proc. SPIE 12353, Advanced Photonics in Urology 2023, 1235302 (14 March 2023); https://doi.org/10.1117/12.2647415