Clinical Experience with EDAP LT-01+ Extracorporeal Shock Wave Lithotripsy for Radiolucent Stones: A Report of 27 Cases

Rim, Hee Kwan; Kim, Ho Sung; Rim, Joung Sik

Abstract

Between February 1990 and February 1993, Radiolucent stones of 27 renal units in 22 patients were treated by extracorporeal shock wave lithotripsy(ESWL) using the EDAP LT-01 +. Intravenous urography was done in all patients for the diagnosis of radiolucent stones. Retrograde pyelography, ultrasonography and/or computed tomography was done, if needed. The locations of stones were kidney in 11(40.7%), upper ureter in 8(29.6%), lower ureter in 6(22.2%), bladder in 1(3.7%), ureteropelvic junction in 1(3.7%). The average stone size was 10.9mm with a range of 5 to 32mm in maximum diameter. The average numbers of treatment were 2.7 sessions and average storage required was 34.8 in one session. The average treatment time was 40.4 minutes. All the patients showed complete removal of all calculous materials. Of 17 urinary stones analysed by chemical method, 8(47.1%) were composed of uric acid, 5(29.4%) of uric acid and calcium, 3 of phosphate and 1 of carbonate and phosphate. Therefore, we conclude that ESWL with EDAP LT-01 + lithotriptor is considered to be a effective noninvasive procedure for treatment of radiolucent stones.