Cutting laser systems for ureteral strictures

C. Durek; Ansgar Knipper; Ralf Brinkmann; Ado Miller; Bernd Gromoll; Dieter Jocham

doi:10.1117/12.169123

15 February 1994 Cutting laser systems for ureteral strictures

C. Durek, Ansgar Knipper, Ralf Brinkmann, Ado Miller, Bernd Gromoll, Dieter Jocham

Proceedings Volume 2086, Medical Applications of Lasers; (1994) https://doi.org/10.1117/12.169123
Event: Europto Biomedical Optics '93, 1993, Budapest, Hungary

Abstract

Acquired ureteral strictures are still treated either with a stent, balloon dilatation, by open surgery or by endoscopic therapy with a `cold knife' or high current density as intubated ureterotomy. The success rates described in the literature range between 50% and 90%. Using the experimental CTH:YAG laser (wavelength 2120 nm) and CT:YAG laser (wavelength 1950 nm), the reduction of invasiveness and of morbidity was evaluated. First, the CTH:YAG laser was investigated on 540 fresh porcine ureters varying the parameters. With a computerized morphometry system, defect depth, defect width, coagulation depth and coagulation width were measured. Then 21 female pigs underwent 7.5 F - 12 F ureteroscopy with CTH:YAG laser, CT:YAG laser, high current density and `cold knife' ureterotomy. An IVP and sacrification with explanation of the whole urinary tract was done on day 6 and around day 60. In practice, laser application via the endoscope was easy to handle and exact cutting was always seen. The CT:YAG laser seems to have the best success results with low ureteral stricture recurrence rates. However, its clinical use remains to be proven.

Citation Download Citation

C. Durek, Ansgar Knipper, Ralf Brinkmann, Ado Miller, Bernd Gromoll, and Dieter Jocham "Cutting laser systems for ureteral strictures", Proc. SPIE 2086, Medical Applications of Lasers, (15 February 1994); https://doi.org/10.1117/12.169123

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