What does this article add?
The results showed that ESWL before the RIRS did not complicate the surgery but significantly increased the peroperative fluoroscopy time. The duration between the last ESWL session to the RIRS was a predictor for stone free-rates. The number of ESWL sessions before the RIRS was a predictor of operation time. According to our knowledge this article is the first article documenting the effect of pre-RIRS ESWL on the efficacy and safety of RIRS.