TY - JOUR AU - Wang, Cong AU - Wang, ShouTong AU - Wang, Xuemei AU - Lu, Jun PY - 2021 DA - 2021/03/04 TI - External validation of the R.I.R.S. scoring system to predict stone-free rate after retrograde intrarenal surgery JO - BMC Urology SP - 33 VL - 21 IS - 1 AB - The R.I.R.S. scoring system is defined as a novel and straightforward scoring system that uses the main parameters (kidney stone density, inferior pole stones, stone burden, and renal infundibular length) to identify most appropriate patients for retrograde intrarenal surgery (RIRS). We strived to evaluate the accuracy of the R.I.R.S. scoring system in predicting the stone-free rate (SFR) after RIRS. SN - 1471-2490 UR - https://doi.org/10.1186/s12894-021-00801-y DO - 10.1186/s12894-021-00801-y ID - Wang2021 ER -