Extracorporeal shock wave lithotripsy in XXXX : 11-year experience with two second-generation lithotripters.

@entity1 @entity8
OBJECTIVES: To present our experience with extracorporeal shock wave lithotripsy (ESWL) in @entity1 with @entity8 and to determine the factors that may influence the stone-free rate in such @entity1 . METHODS: From February 1989 to February 2000, 198 @entity1 were treated for @entity8 using ESWL. The mean @entity1 age (SD) was 40.48 (11.53) years. The kidneys were horseshoe in 49 (24.7%), malrotated in 120 (60.6%), and duplex in 29 (14.7%). All @entity1 were treated on an outpatient basis using two second-generation lithotripters (Dornier MFL 5000 and Toshiba Echolith). Pretreatment auxiliary measures were required in 6 @entity1 (3%). Follow-up data were recorded at 3 months. The statistical analysis was performed using the chi-square and Mann-Whitney U tests, with differences considered statistically significant if P <0.05. RESULTS: The mean stone length (SD) was 13.54 (5.49) mm. The stones were single in 148 (74.7%), of new onset in 155 (78.3%), and on the right side in 82 (41.4%). All stones, but 5 (2.5%), were radiopaque. The overall stone-free rate was 72.2%. Neither the type of @entity8 nor the type of lithotripter had any impact on the stone-free rate (P >0.05). Stone burden (length and number) had a significant influence on the stone-free rate (P <0.05). No extraordinary complications were recorded. Steinstrasse developed in 7 @entity1 (3.5%). No deterioration of renal function or configuration was detected. CONCLUSIONS: ESWL is safe and reliable for treatment of @entity8 . It should be the primary therapy when the stones are less than 20 mm. The ESWL outcome is comparable for normal and @entity8 when the calculus size is considered.
