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Proceedings Paper

Cutting laser systems for ureteral strictures
Author(s): C. Durek; Ansgar Knipper; Ralf Brinkmann; Ado Miller; Bernd Gromoll; Dieter Jocham
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Paper 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.

Paper Details

Date Published: 15 February 1994
PDF: 6 pages
Proc. SPIE 2086, Medical Applications of Lasers, (15 February 1994); doi: 10.1117/12.169123
Show Author Affiliations
C. Durek, Medical Univ. Luebeck (Germany)
Ansgar Knipper, Medical Univ. Luebeck (Germany)
Ralf Brinkmann, Medical Laser Ctr. Luebeck (Germany)
Ado Miller, Medical Laser Ctr. Luebeck (Germany)
Bernd Gromoll, Medical Univ. Luebeck (Germany)
Dieter Jocham, Medical Univ. Luebeck (Germany)


Published in SPIE Proceedings Vol. 2086:
Medical Applications of Lasers
Kazuhiko Atsumi M.D.; Cornelius Borst M.D.; Frank W. Cross M.D.; Herbert J. Geschwind M.D.; Dieter Jocham; Jan Kvasnicka; Hans H. Scherer M.D.; Mario A. Trelles; Eberhard Unsoeld, Editor(s)

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