Treatment of urethral strictures with the KTP 532 laser

Franz R. Schmidlin M.D.; Michael Oswald M.D.; Christoph E. Iselin M.D.; Patrice Jichlinski; Guy P. Delacretaz; Hans-Juerg Leisinger M.D.; Peter Graber M.D.

doi:10.1117/12.275073

22 May 1997 Treatment of urethral strictures with the KTP 532 laser

Franz R. Schmidlin M.D., Michael Oswald M.D., Christoph E. Iselin M.D., Patrice Jichlinski, Guy P. Delacretaz, Hans-Juerg Leisinger M.D., Peter Graber M.D.

Author Affiliations +

Proceedings Volume 2970, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VII; (1997) https://doi.org/10.1117/12.275073
Event: BiOS '97, Part of Photonics West, 1997, San Jose, CA, United States

Abstract

The objective of this study was to evaluate and compare the safety and efficacy of the KTP 532 laser to direct vision internal urethrotomy (DVIU) in the management of urethral strictures. A total of 32 patients were randomized prospectively in this study, 14 DVIU and 18 KTP 532 laser. Patients were evaluated postoperatively with flowmetry and in the case of recurrence with cystourethrography at 3, 12, 24 weeks. With the KTP 532 laser complete symptomatic and urodynamic success was achieved in 15 (83%) patients at 12 and 24 weeks. Success rate was lower in the DVIU group with 9 (64%) patients at 12 weeks and 8 (57%) patients at 24 weeks. With the KTP mean preoperative peak-flow was improved from 6 cc/s to 20 cc/s at 3, 12 and 24 weeks. With DVIU mean preoperative peak-flow was improved from 5.5 cc/s to 20 cc/s at 3 weeks followed by a steady decrease to 13 cc/s at 12 weeks and to 12 cc/s 24 weeks. No complications were observed in either group of patients. Our results confirm that stricture vaporization with the KTP 532 laser is a safe and efficient procedure. It thus represents a valuable alternative in the endoscopic treatment of urethral strictures.

Citation Download Citation

Franz R. Schmidlin M.D., Michael Oswald M.D., Christoph E. Iselin M.D., Patrice Jichlinski, Guy P. Delacretaz, Hans-Juerg Leisinger M.D., and Peter Graber M.D. "Treatment of urethral strictures with the KTP 532 laser", Proc. SPIE 2970, Lasers in Surgery: Advanced Characterization, Therapeutics, and Systems VII, (22 May 1997); https://doi.org/10.1117/12.275073

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KEYWORDS

Ferroelectric materials

Laser therapeutics

Laser safety

Tissues

Endoscopy

Safety

Laser tissue interaction

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