Correlation between the operation time using two different power settings of a Ho: YAG laser: laser power doesn't influence lithotripsy time.

Abstract

BACKGROUND:

This study investigated the correlation between the operation time using two different power settings of a Ho: YAG laser.

FINDINGS:

A total of 68 patients underwent cystolithotripsy from April 2010 to October 2011 In Fifty-six of these patients underwent cystolithotripsy by one surgeon using a Ho: YAG laser for bladder calculi. This study assessed these patients in two groups; the 30 W laser generator group with the settings of 2.5 J x 5 Hz (30 W group) and the 100 W laser generator group as the settings of 3.5 J x 5 Hz (100 W group). The operation time in these two groups were assessed.A total of 56 patients including 45 male and 11 female patients that underwent cystolithotripsy using a Ho: YAG laser for bladder calculi by one surgeon were enrolled in this study. The patients' characteristics including age (mean; 68.8 vs 68.4 yr), gender (male; 74.2 vs 88.0%), stone burden (mean; 34.9 vs 41.3 mm), number of stones (mean; 3.2 vs 2.0) and stone's CT density (mean; 981.5 vs 902.0 HU) showed no significant differences. All patients were stone free following treatment. The median total length of the operation was 19 minutes (mean: 34.6 ± 36.1) in the 30 W group and 29 minutes (mean: 44.4 ± 38.8) in the 100 W group, which was not significantly different.

CONCLUSIONS:

The results showed that the power settings of Ho: YAG laser show no differences in the operation time for bladder calculi lithotripsy.

• Authors: Takashi Kawahara, Hiroki Ito, Hideyuki Terao, Yoshitake Kato, Katsuyuki Tanaka, Takehiko Ogawa, Hiroji Uemura, Yoshinobu Kubota, Junichi Matsuzaki
• Journal: BMC research notes (BMC Res Notes) Vol. 6 Pg. 80 (Mar 05 2013) ISSN: 1756-0500 [Electronic] England
• PMID: 23510531 (Publication Type: Journal Article)

Topics

• Aged
• Aged, 80 and over
• Female
• Humans
• Laser Therapy
• Lithotripsy
• Male
• Middle Aged
• Time and Motion Studies
• Urinary Bladder Calculi (therapy)