Experimental stone clearance with in‐scope suction and flexible and navigable suction access sheaths

Objective To perform benchtop experiments using direct in‐scope suction (DISS) ureteroscopes (Pusen Medical, Zhuhai, China; 3.6‐Ch and 5.1‐Ch working channels) and flexible and navigable suction (FANS) ureteric access sheaths (ClearPetra; Wellead, Guangzhou, China) to establish their ability to clear stones of different diameters. Methods For each experimental group, we conducted a series of experiments using mixes of progressively larger stone particles (250 μm and >500 μm (with 3.6‐Ch and 5.1‐Ch working channels) may block the ureteroscope. The use of FANS, through successful clearance of larger fragments, may facilitate clearance of larger fragments.