Genestone 190 Extracorporeal Shock Wave Lithotriptor for the Treatment of Urinary Calculi

Hong, Young Kwon

Abstract

PURPOSE: To evaluated the effectiveness and safety of extracorporeal shock wave lithotripsy (ESWL), with a Genestone 190 lithotriptor, in patients with urinary calculi.
MATERIALS AND METHODS
423 cases of urinary stones, treated with a Genestone 190 lithotriptor, were reviewed retrospectively. The cases were divided into 4 groups; groups A, B, C and D, with stone sizes of 4-10, 11-20, 21-30 and greater than 30mm, respectively. The number of sessions, according to the stone size, and the success rates, according to the size and location of stones, were statistically analysed. Auxiliary measures, other treatment modalities and complications were also reviewed.
RESULTS
The number of sessions correlated well with the stone size (p<0.01). There was a statistically significant increase in the number of sessions in the groups with stones greater than 20mm and 30mm in size. The success rates were 96.2, 77.3, 48 and 50% in groups A, B, C and D, respectively. There was a reverse correlation between the success rate and the stone size (p<0.01). The success rates were 91 and 76.1% in 269 cases of upper ureter stones 42 of lower ureter stones, respectively, with a significant difference between the two groups (p<0.01). There was no significant difference in the success rates between renal and ureter stones, or among renal pelvis, upper calyx, midcalyx and lower calyx stones. Complicated cases requiring intervention were rare, but Steinstrasse, fever and a perirenal hematoma occurred in 7, 3 and 1 cases, respectively.
CONCLUSIONS
The Genestone 190 lithotriptor is considered to be an effective and safe tool for the treatment of urinary calculi, especially when the size of calculi is less than 20mm.