...Lennert Eismann; Severin Rodler; Alexander Buchner; Frank Strittmatter; Abdulmajeed Alghamdi; Simon Lennartz; Jan-Peter Grunz; Raphaela Waidelich; Armin Becker; Philipp Weinhold; Alexander Kretschmer; Christian G. Stief; Thilo Westhofen Introduction: Ureteral access sheaths (UASs) are widely used...

... of the ureteral meatus, are time-consuming and would require a tool to facilitate multiple insertions of the ureteroscope and to avoid ureteral injury. An access sheath is now available and it facilitates ureteroscopy of the upper ureter. To answer the question whether its application could be expanded...