Abstract:To investigate the clinical effect of preoperative nephrostomy in treatment of senile patients with renal calculi with flexible ureteroscope and holmium laser. Methods From February 2016 to August 2017, 80 cases of elderly renal calculi with ureteroscopic lithotripsy were randomly divided into observation group and control group, 40 cases in each. The percutaneous nephrostomy was done which guided by ultrasound or CT guided before flexible ureteroscopic holmium laser lithotripsy in the observation group. In the control group, the flexible ureteroscopic holmium laser lithotripsy was performed directly. The postoperative bleeding and infection, the stone clearance rate, the C reaction protein and the length of hospital stay were evaluated. Results All the operations were successful, and no severe bleeding or hyperthermia occurred in the observation group. There were 3 cases of fever in the control group. Surgical duration was (45.1 ± 3.1) min for the observation group, which was lower than the observation group (65.5 ± 2.2) min, and the difference was statistically significant. The stone clearance rate at postoperative one month of the observation group was 94.3% (33/35), which was significantly lower than control group,which was 77.8% (28/36), and the C reaction protein at the end of operation and at 24 h postoperative were all lower than that of the control group, and the difference was statistically significant. Conclusion Preoperative nephrostomy was safe and effective in treatment of senile patients with renal calculi with flexible ureteroscope and holmium laser.