Adjunctive Medical Therapy with α-Blocker after Extracorporeal Shock Wave Lithotripsy of Renal and Ureteral Stones: A Meta-Analysis

Background Although some trials assessed the efficacy and safety of the alpha-blocker in facilitating renal and ureteral stones expulsion after extracorporeal shock wave lithotripsy (ESWL), the role of the alpha-blocker in facilitating upper urinary calculi expulsion after ESWL remain controversial. Aims To determine the efficacy and safety of the alpha-blocker in facilitating renal and ureteral stones expulsion after ESWL. Methods A literature search was carried out using the PubMed database, EMBASE and the Cochrane Library database to identify relevant studies. Two reviewers independently extracted data and assessed methodological quality. Pooled effect estimates were obtained using a fixed- and random-effects meta-analysis. Results The meta-analysis included 23 RCTs, alpha-blocker significantly enhanced expulsion rate of upper urinary tract calculi after ESWL (P<0.00001; RR 1.21; 95% CI 1.12-1.31), significantly promoted steinstrasse expulsion (P=0.03; RR 1.25; 95% CI 1.03-1.53), significantly shortened the discharge time of upper urinary tract calculi (P=0.0001; MD -2.12; 95% CI -3.20--1.04), significantly reduced the patient's pain VAS score (P=0.001; RR -1.0; 95% CI -1.61--0.39). Compared with the control group, dizziness (P=0.002; RR 5.48; 95% CI 1.91-15.77), anejaculation (P=0.02; RR 12.17; 95% CI 1.61-91.99) and headache (P=0.04; RR 4.03; 95% CI 1.04-15.72) in the alpha-blocker group was associated with a higher incidence. Conclusions Treatment with alpha-blocker after ESWL appears to be effective in enhancing expulsion rate of upper urinary tract calculi, shortening the discharge time of upper urinary tract calculi, reducing the patient's pain. The side effects of a-blocker were light and few.