Abstract:
Objective:To explore the surgical technique points of ureteroscopic holmium laser lithotripsy in the treatment of ureteral street stone caused by extracorporeal shock wave lithotripsy. Methods:Twenty-three patients who suffered from ureteral street stone caused by ESWL for kidney or ureteral stone were enrolled in this study. Among which, 9 cases were upper segment ureter stone and 14 cases were middle or inferior segment ureter stone. All cases underwent ureteroscopic holmium laser lithotripsy with a F4 ureteral catheter inserted and crossed by the stone with certain depth under straight supervision of ureteroscopy. Normal saline was injected continuously through the catheter during lithotripsy procedure. Double J tube was put before operation ended. Surgical effect and complication were observed any analyzed. Results:All operations were successful with no case transferred to open surgery. No ureter perforation or breakage occurred during sergery. Total operation time was (38±7)min. Time of stone removal was (9±3)min. Stone clearance rate were 100% confirmed by KUB X-ray. All patients received 3 months to 1 year follow-up. B-ultrasound showed no residual stones and postoperative ureteral stricture occurred. Conclusions:Intraoperative paracalculous ureteral catheter and continuous antegrade perfusion can prevent stone immigration, maintain clear operation field and favor stone removal. Combining certain surgical skill of ureteroscopic holmium laser lithotrips may result in good surgical performance. It deserves clinical application and popularization.