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Defining optimal laser-fiber sweeping angle for effective tissue vaporization using 180 W 532 nm lithium triborate laser.

Abstract：

PURPOSE:The goal of this study is to identify the most efficient sweeping angle (SA) during photoselective vaporization of the prostate (PVP). MATERIALS AND METHODS:Experiments were conducted with GreenLight XPS™ laser at 120 and 180 W. Ten blocks of porcine kidney were used for each SA (0, 15, 30, 45, 60, 90, and 120 degrees). Vaporization efficiency was assessed by the amount of tissue removed per time. The coagulation zone (CZ) thickness was also measured. RESULTS:Maximal vaporization rate (VR) was achieved at SA 15 and 30 degrees. Irrespective of power, VR increased and CZ decreased linearly with decreasing SA from 120 to 30 degrees. The CZ was the thinnest at SA 30 degrees. CONCLUSIONS:Optimal vaporization occurred at a SA of 15 degrees and 30 degrees with the lowest CZ at 30 degrees. Contrary to a previous recommendation for a wider SA (60 degrees or greater), a narrower SA (30 degrees) achieved the maximal tissue vaporization efficiency.

journal_name

J Endourol

journal_title

Journal of endourology

authors

Ko WJ,Choi BB,Kang HW,Rajabhandharaks D,Rutman M,Osterberg EC

doi

10.1089/end.2011.0356

subject

Has Abstract

pub_date

2012-04-01 00:00:00

pages

313-7

issue

4

eissn

0892-7790

issn

1557-900X

journal_volume

26

pub_type

杂志文章

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