Abstract:Objective To discuss the effect and safety of percutaneous nephrolithotomycombined with retrograde flexible ureteroscopy on semi-supine and lithotomy position in the treatment of complex staghorn renal calculi. Methods We selected 83 patients with complex staghorn renal calculi admitted into our hospital from Sep. 2016 to July 2018, and then randomly divided them into observation group and control group. Observation group: 23 cases of male and 18 cases of female, aged from 43 to 67 and the average age was 52.5; the biggest diameter of calculus was from 3.4 to 6.0cm, and the average diameter was 4.4cm; there were 20 cases of left renal calculus and 21 cases of right renal calculus; STONE assessment was from 8 to 12 scores, and average score was 10.1 scores. Control group: 21 cases of male and 21 cases of female, aged from 39 to 63 and average age was 51.1; the biggest diameter of calculus was from 3.2 to 5.7cm, and the average diameter was 4.3cm; there were 24 cases of left renal calculi and 18 cases of right renal calculi; STONE assessment was from 8 to 12 scores, and the average score was 9.7 scores. There was no significant difference between the two groups (P > 0.05). The patients of observation group were given percutaneous nephrolithotomy combined with retrograde flexible ureteroscopy by semi-supine and lithotomy position and the patients of control group were given percutaneous nephrolithotomy by standard way and on routine position to take lithoclasty and lithotomy. We observed the clearance of calculi, amount of bleeding during the operation, related factors of inflammatory and urinary tract infection and other indexes of the two groups. Results There was no significant difference in general data between the two groups (P > 0.05). Indexes two hours after the surgery of observation group and control group included clearance of calculi: 85.3% (35/41) VS 52.4% (22/42), postoperative hemoglobin rate of descent: (18±7.8) g/L VS (24±11.9) g/L, postoperative blood transfusion rate: 4.9% (2/41) VS 19.0% (8/42), incidence rate of urinary tract infection: 22.0% (9/41) VS 42.9% (18/42) and average procalcitonin on the first day after operation: (0.55±0.23) ng/ml VS (1.17±0.46) ng/ml; there was statistical significance between the two groups (all P < 0.05). The average operative time of the two groups were (121±16.8) min and (113±13.2) min, respectively, and the difference was not statistically significant (P = 0.5573). Conclusions Percutaneous nephrolithotomy combined with retrograde flexible ureteroscopy by semi-supine and lithotomy position in the treatment of complex staghorn renal calculi has high clearance of renal calculi, less complication and it is a safe and effective therapy.