Outcomes with ureteral access sheath in retrograde intrarenal surgery: a retrospective comparative analysis

BACKGROUNDRetrograde intrarenal surgery is used for treatment of urinary system stones. The ureteral access sheath (UAS) is used to decrease intrapelvic pressure, help with access of multiple instruments, and facilitate drainage and removal of the fragmented stones. OBJECTIVEAssess the effect of the UAS on the outcomes of retrograde intrarenal surgery. DESIGNA retrospective patient data review. SETTINGTraining and research hospital in Turkey. PATIENTS AND METHODSWe reviewed the data of patients who had undergone retrograde intrarenal surgery between 2012-2019. Patients who had kidney anomalies, were