The purpose of this study is to explore the clinical application of an improved operating astral lamp. Most operating astral lamps now used in hospitals are not equipped with protective equipment for sudden power cut. Once the power cut occurs, the operation will be influenced and a medical dispute between patients and medical staffs can not be avoided.

Objective To evaluate the clinical efficacy and safety of application of anterograde flexible ureteroscope in the treatment of ureterointestinal anastomotic strictures in patients after Bricker urinary diversion. Methods From March 2009 to July 2012, 6 patients with ureterointestinal anastomotic strictures after Bricker procedure were enrolled in this study. The average age of the patients was (61 ±7) years old. The first clinical presentation was averagely (6.3 ±2.5) months after the Bricker procedure. There were 4 cases with left side strictures and 2 cases with right side ones. The urinary tract ultrasound, CT, KUB+IVP and antegrade urography were carried out to identify the obstructive portion. The mean length of stricture was 0.9cm (0.4~2.5) . First, all patients underwent percutaneous nephrostomy (PCN), then inside incision by Holmium:YAG laser under anterograde flexible ureteroscopy and lithotripsy (with calculi) . The F6 double J ureteral stent was indwelled for 12 weeks. KUB+IVP was performed after removal of double J ureteral stents. Results The mean operative time was (53±8) min. The mean hospital stay was (5.5±2) days. The blood loss was 3~6 mL. The average follow-up was 18 months (6~30) . No recurrence was found in 5 patients. One case had recurrent stricture after the first procedure, which was successfully managed by the flexible ureteroscopy again and replacing double J ureteral stent every 12 months. Conclusion The inside incision by anterograde flexible ureteroscopic Holmium:YAG laser is safe and effective for ureterointestinal anastomotic strictures in patients after Bricker urinary diversion, with less complications.