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Durability of laser fibers
E te Slaa1, A F van Ettergem, C A van 't Hof
1Department of Urology, University Hospital Nijmegen, The Netherlands.
World Journal of Urology
|January 1, 1995
Summary
Laser prostatectomy fiber tips showed varied durability. Urolase fibers sustained less visual damage, but both fiber types experienced significant energy loss, with poor correlation between visual damage and transmission loss.
Area of Science:
- Urology
- Medical Devices
- Laser Surgery
Background:
- Laser prostatectomy is a common treatment for benign prostatic hyperplasia.
- The durability and performance of laser fibers are critical for effective treatment.
- Urolase and Ultraline are two types of laser fibers used in prostatectomy.
Purpose of the Study:
- To compare the fiber-tip durability and energy transmission of Urolase and Ultraline laser fibers after prostatectomy.
- To assess the relationship between visual fiber damage and energy transmission loss.
Main Methods:
- Visual inspection of fiber tips from 90 patients undergoing laser prostatectomy (50 Urolase, 40 Ultraline).
- Laboratory transmission measurements to quantify energy output loss at the fiber tip.
- Correlation analysis between visual damage grading and transmission loss.
Main Results:
- Urolase fiber tips showed less visual damage (62% minimally damaged) compared to Ultraline (28% minimally damaged).
- Ultraline fibers were more susceptible to fragility, while Urolase fibers were more prone to tissue contact damage.
- All fibers exhibited significant energy loss; none of the Ultraline fibers had <10% transmission loss, and 18% of Urolase fibers had >90% transmission.
- A poor correlation was observed between visual fiber appearance and transmission loss.
Conclusions:
- Both Urolase and Ultraline laser fibers experience significant energy transmission loss post-prostatectomy.
- While Urolase shows better visual durability, neither fiber type is immune to performance degradation.
- Visual inspection alone is insufficient to predict the functional performance (energy transmission) of laser fibers.