What question did this study set out to answer?

To quantify stone retropulsion caused by the pulsed holmium:YAG laser across varied pulse energies, pulse frequencies, and fiber diameters in a standardized model.

April 1, 1998Journal of Endourology

Evaluation of Retropulsion Caused by Holmium: YAG Laser with Various Power Settings and Fibers

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Authors

MWMark WhiteUniversity of Liverpool MMMichael E. MoranUniversity College Dublin CCChristopher J. CalvanoDeutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)

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Implication

Experimental in vitro study reveals mid-sized laser fibers produce maximal stone retropulsion and comminution, highlighting the need to optimize fiber selection.

Key Points

To quantify stone retropulsion caused by the pulsed holmium:YAG laser across varied pulse energies, pulse frequencies, and fiber diameters in a standardized model.
Tested 36 combinations of laser pulse energy (0.6, 0.8, 1.0 J), pulse frequency (10, 16, 20 Hz), and optical fiber diameter (200, 365, 550, 1000 µm) across 10 trials per setting.
Positioned 2 mg (± 0.1 mg) silicate model stones at the fiber tip inside a saline-filled, rigid polymer artificial ureter model and activated the laser for 2-second bursts.
Recorded maximum and net stone retropulsion in millimeters and analyzed pairwise comparisons via paired Student t-tests holding individual variables constant.
The greatest stone retropulsion occurred with the 365-µm and 550-µm diameter fibers.
The highest levels of stone comminution were observed with 365-µm and 550-µm fibers.
There was no statistically significant correlation between the extent of observed retropulsion and the efficiency of stone comminution.

Cite This Study

White et al. (1998) studied this question.

synapsesocial.com/papers/6a6fe800febe604dd708bac2 https://doi.org/10.1089/end.1998.12.183

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Implication

Experimental in vitro study reveals mid-sized laser fibers produce maximal stone retropulsion and comminution, highlighting the need to optimize fiber selection.

Evaluation of Retropulsion Caused by Holmium: YAG Laser with Various Power Settings and Fibers

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Implication

Key Points

Cite This Study

Evaluation of Retropulsion Caused by Holmium: YAG Laser with Various Power Settings and Fibers

Discussion

Member takes

Implication

Key Points

Cite This Study

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