Investigating Frequency of Urinary Stones and Predicting Success Rate of Extracorporeal Lithotripsy Instruments in Public Hospitals in Western Iran

Background: The present study was aimed to determine the frequency of urinary tract stones and estimate success rate of ESWL procedure in three general hospitals in Lorestan province, Iran.

Materials and Methods: In this cross- sectional study, a total of 336 patients referring to the three lithotripsy wards for lithotripsy were included. The lithotripters: PIZOLIT-3300WOLF, SLKMODULITH-STORZ, GENEMED-190 were used in Shafa, Tohid and Shohada Ashayer hospitals, respectively. The Chi-square test was applied to evaluate the univariate association between independent variables and outcome. P < 0.05 was considered to be statistically significant.

Results: The results showed that the highest success rate was observed by WOLF lithotripter in Shafa hospital with success rate of 72%. The perfect success rate for the ureter stones was 40%, and the relative success and failure rates were equal to 32% and 26%, respectively.

Conclusion: Although three lithotripters with different specifications were included in this study, there is no significant differences in perfect and relative success rate. In addition, the results showed that the most success rate was obtained in stones lesser than 10 mm sizes and bigger than 10 mm the rate of success will be reduced.

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