What effect do different 200 μm laser fibres have on deflection and irrigation flow rates in a flexible ureterorenoscope?
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The objective of the study is to evaluate the reduction in flow and scope deflection of four leading 200-μm marketed laser fibres (Boston Scientific Flexiva™ 200, Boston Scientific Flexiva™ Trac Tip 200, Lumenis SlimLine™ EZ200 and Optical Integrity ScopeSafe™) via a flexible ureterorenoscope. A laboratory-based bench test was performed using a Flex X2™ flexible ureterorenoscope. Mean upward/downward deflection angles and flow rates (ml/min) for each fibre were calculated and compared to a control. The Optical Integrity ScopeSafe™ fibre has the least loss of deflection, losing only 8 % upward and 6 % downward deflection. Deflection loss was significantly less with this fibre compared to all other fibres (p < 0.0001). Mean flow rates were significantly greater with the Optical Integrity ScopeSafe™ laser fibre at 23 ml/min (p < 0.0001). Despite all fibres marketed as 200 μm, the deflection and flow properties show marked variations. The Optical Integrity ScopeSafe™ 200-μm laser fibre offers the best overall performance with significantly improved flow rates and the least loss of scope deflection.
KeywordsDeflection Fibre Flow Laser Ureterorenoscopy
The authors declare no competing financial interests. The manuscript does not contain clinical studies or patient data
Conflict of interests
The authors declare that they have no competing interests
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