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Proceedings Paper

Endoscopic laser fragmentation of ureteral calculi using the holmium:YAG
Author(s): Jeanie Sayer; Douglas E. Johnson; Roger E. Price; Douglas M. Cromeens
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Paper Abstract

We used the holmium:YAG (Ho:YAG) laser successfully to fragment human urinary calculi of various sizes and compositions. At an energy level of 0.5 J/pulse and a frequency of 5 Hz, lithotripsy resulted in minimal ureteral-wall injury that was limited to superficial coagulative necrosis of the submucosa. Increasing the amount of energy or the frequency level, however, often resulted in significant damage to deeper ureteral tissue. When performed at low power settings with care to avoid direct ureteral-wall contact, Ho:YAG laser lithotripsy is safe and effective.

Paper Details

Date Published: 28 May 1993
PDF: 6 pages
Proc. SPIE 1879, Lasers in Urology, Gynecology, and General Surgery, (28 May 1993); doi: 10.1117/12.146231
Show Author Affiliations
Jeanie Sayer, Univ. of Texas M.D. Anderson Cancer Ctr. (United States)
Douglas E. Johnson, Univ. of Texas M.D. Anderson Cancer Ctr. (United States)
Roger E. Price, Univ. of Texas M.D. Anderson Cancer Ctr. (United States)
Douglas M. Cromeens, Univ. of Texas M.D. Anderson Cancer Ctr. (United States)


Published in SPIE Proceedings Vol. 1879:
Lasers in Urology, Gynecology, and General Surgery
Christopher J. Daly; Warren S. Grundfest; Douglas E. Johnson; Raymond J. Lanzafame; Rudolf W. Steiner; Yona Tadir; Graham M. Watson, Editor(s)

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