Increased efficacy in lower pole stone management with a novel flexible and navigable suction ureteral access sheath with flexible ureteroscopic lithotripsy: a case series.

Background: The flexible and navigable suction ureteral access sheath (FANS-UAS) is regarded as a complement to flexible ureteroscopy in retrograde intrarenal surgery. Management of lower pole stones (LPS) is challenging due to the difficulty of anatomical access to the inferior renal calyx.

Case Description: The novel FANS-UAS (11/13.