Predictors of success for stone fragmentation and stone-free rate after extracorporeal shockwave lithotripsy in the treatment of upper urinary tract stones

Kiyoshi Takahara, Naokazu Ibuki, Teruo Inamoto, Hayahito Nomi, Takanobu Ubai, Haruhito Azuma

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4 Citations (Scopus)

Abstract

Purpose: To evaluate factors affecting the success rate of stone fragmentation and stone-free rate after extracorporeal Shockwave lithotripsy (SWL) in treatment of upper urinary tract stones. Materials and Methods: A total of 121 patients with upper urinary tract calculi underwent SWL treatment. Results: Success rate of stone fragmentation after SWL was 73.6% (89/121). In 89 patients who had success of breaking stones, 71 patients were followed up for the assessment of stone-free status, of whom 51 (71.8%) patients were stone-free at 3-month follow-up. Among four prognostic factors, including body mass index (BMI), stone size, stone position, and hydronephrosis, BMI and stone position had a significant impact on the success rate of stone fragmentation (P = .04 and Ul: S|BpjiB|P = .0108, respectively). Among five prognostic factors of BMI, stone size, stone position, hydro-nephrosis, and times of SWL treatments, stone size was the only factor with significant impact on the stone-free rate (middle: P = .0229). Conclusion: Our study suggests that stone fragmentation and stone-free rate after SWL treatment for upper urinary tract stones can be predicted.

Original languageEnglish
Pages (from-to)549-552
Number of pages4
JournalUrology Journal
Volume9
Issue number3
Publication statusPublished - 27-11-2012
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Urology

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