In vitro and in vivo experiences with ureterorenoscope by Gelet

Area of Science:

• Urology
• Medical Devices
• Endoscopy

Background:

• Ureterorenoscopes with unidirectional flow present a trade-off between visualization and intrarenal pressure.
• High pressure in the ureter and renal pelvis can compromise patient safety during ureterorenoscopy.
• Advancements in ureteroscope technology aim to improve optical quality, flow dynamics, and handling.

Purpose of the Study:

• To compare the Gelet ureterorenoscope (continuous bidirectional flow) with the Pérez-Castro instrument (common irrigation/working access).
• To evaluate optical quality, flow-irrigation characteristics, and handling of the two ureteroscope designs.
• To assess the impact of ureteroscope design on intrarenal pressure and procedural safety.

Main Methods:

• Comparative analysis of two ureteroscope designs: Gelet (separate channels) and Pérez-Castro (common access).
• Investigation focused on optical quality, flow dynamics, and instrument handling.
• Assessment of pressure dynamics within the ureter and renal collecting system.

Main Results:

• The Gelet instrument, with separate irrigation and working channels, provides continuous flow and maintains good visualization.
• The separated outlet channel in the Gelet design effectively prevents high pressure in the ureter and renal pelvis.
• The Gelet instrument offers additional access for instrumentation, enhancing patient safety and procedural convenience.

Conclusions:

• The Gelet ureterorenoscope design, featuring continuous bidirectional flow, offers significant advantages over unidirectional systems.
• Improved visualization, reduced intrarenal pressure, and enhanced safety are key benefits of the Gelet instrument.
• Separation of camera and light source connections improves the overall convenience of the ureterorenoscopy procedure.