Abstract:Objective To explore the utility and safety effect on complex kidney stones treatment by semi supine position endoscopic combined intrarenal surgery.Methods We retrospectively analyzed the clinical data of 112 patients of complex kidney stones who underwent the semi supine position endoscopic combined intrarenal surgery with flexible ureteroscopy and percutaneous nephrolithotomy (PCNL) from Oct 2016 to 2019. Single percutaneous tract was established by B-ultrasound positioning, and the main part of the stone were treated by PCNL. Then, flexible ureteroscopy was put in the renal collecting system and completed the lithotripsy. Patients need to accept the CT examination again to check the stone-free rates.Result 112 cases were completed well without any shock or death complication. The surgery duration was (45.5 ± 12.7) min and hospitalization time was (7.3 ± 2.1) d. After the surgery, 5 patients accepted blood transfusion and 12 patients had a fever. 10 patients were examined with retained stones with the stone-free rate of 91.1% at last.Conclusion By the semi supine position endoscopic combined intrarenal surgery, a complementary parallel-tract treatment was established effectively improve the complex kidney stones treatment result, which can be explored deeper and promoted wider.