Overview Tamsulosin Assisted Ureteral Access Sheath Insertion Status: Not yet recruiting Trial end date: 2023-07-31 Target enrollment: Participant gender: Summary Aim is to study if 1 week of pre operative tamsulosin would enable easier insertion of ureteral access sheath in primary retrograde intrarenal surgery for renal stone disease Phase: Phase 3 Details Lead Sponsor: Sengkang General HospitalTreatments: Tamsulosin