Alpha-Blockers Prior to Ureteral Access Sheath Placement in Flexible Ureteroscopy: A Randomized Prospective Study

Participants in the experimental arm will receive an oral alpha-blocker (tamsulosin 0.4 mg) once daily for 7 consecutive days before undergoing flexible ureterorenolithotripsy. The medication is intended to relax ureteral smooth muscle fibers, potentially facilitating the insertion of the ureteral access sheath and reducing the need for a secondary procedure. The dose, route, and timing are standardized for all participants in this arm.

Participants in this arm will undergo flexible ureterorenolithotripsy without receiving any alpha-blocker prior to surgery. All other perioperative care and surgical procedures will follow the same protocol as the experimental group.