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연세대학교 의과대학 Yonsei Medical Journal Yonsei Medical Journal 제58권 제5호
발행연도
2017.1
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1,000 - 1,005 (6page)

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Purpose: To evaluate predictors of the success rate for one session of shock wave lithotripsy (SWL), focusing on the relationships between pretreatment hydronephrosis grade and one-session SWL success rates. Materials and Methods: The medical records of 1824 consecutive patients who underwent an initial session of SWL for treatment of urinary stones between 2005 and 2013 were reviewed. After exclusion, 700 patients with a single, 4–20 mm diameter radiopaquecalculus were included in the study. Results: The mean maximal stone length (MSL) and skin-to-stone distance were 9.2±3.9 and 110.8±18.9 mm, respectively. The average values for mean stone density (MSD) and stone heterogeneity index (SHI) were 707.0±272.1 and 244.9±110.1, respectively. One-session success rates were 68.4, 75.0, 75.1, 54.0, and 10.5% in patients with hydronephrosis grade 0, 1, 2, 3, and 4, respectively. Patients were classified into success or failure groups based on SWL outcome. Multivariate logistic regression analyses revealed that MSL [odds ratio (OR) 0.888, 95% confidence intervals (CI): 0.841–0.934, p<0.001], MSD (OR 0.996, 95% CI: 0.995–0.997, p< 0.001), SHI (OR 1.007, 95% CI: 1.005–1.010, p<0.001), and pretreatment hydronephrosis grade (OR 0.601, 95% CI: 0.368–0.988, p= 0.043) were significantly associated with one-session success. Conclusion: Pretreatment grades 3 or 4 hydronephrosis were associated with failure of SWL in patients with a single ureteral stone. In the presence of severe hydronephrosis, especially hydronephrosis grade 4; physicians should proceed cautiously in choosingand offering SWL as the primary treatment for ureteral stone.

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