Flexible Ureteroscopy Combined with Novel Ultra-Flexible Ureteral Access Sheaths for Treating Allium Stent Encrustation: Initial Experience with 15 Cases

Encrustation significantly affects the lifespan of Allium stents. Currently, there is no established treatment for Allium ureteral stent encrustation. This study introduces a method for treating these encrustations using a flexible ureteroscopy (F-URS) combined with a novel ultra-flexible ureteral access sheath (UF-UAS).