Pendulum-Extracorporeal Shock Wave Lithotripsy using the Lithoring Lithotriptor

Kim, Young Sun; Shim, Bong Suk

Abstract

Lithoring is a third generation lithotriptor which is developed by Medas company in Italy. It is characterized by pendulum-ESWL and composed by electrohydraulic spark gap generator, computerized control system, fluoroscopic and ultrasonic focusing system, treatment table and ring. From January 1995 to December 1995, 174 patients underwent 286 treatments with Pendulum-ESWL, Lithoring. The results were obtained as follows; 1. The average numbers of treatment were 1.6 sessions and the average treatment time is 32 minutes. average shock waves were 22l2 times. 2. The locations of stone were kidney in 144 (50.4%), ureter in 139 (48.6%) and bladder in 3 (1.0%). 3. As a pre-ESWL additional manipulation, we did ureteral stent in 34 cases, and ureteral catheter in 5 cases. The position of patients was all supine position and so patients felt comfortable. The localization of stones was used by fluoroscopy in 270 cases, and ultrasound in 16 cases. 4. The average success rates were 87.1% and it was almost same compared with others. 5. No complications were reported except nausea, vomiting, fever, steinstrasse. 6. No general or regional anesthesia were required. Therefore, we suggest that extracorporeal shock wave lithotripsy with Lithoring is considered to be safe and effective treatment of urinary stones.