Abstract
A systematic review and meta-analysis of microsurgical vasoepididymostomy (MVE) for treating epididymal obstructive azoospermia (EOA) with different intussusception techniques. We conducted a comprehensive literature search using PubMed, Embase, and the Cochrane Central Register of Controlled Trials, retained literature related to obstructive azoospermia or male infertility and vasoepididymostomy, proactively reviewed other relevant literature, supplemented valuable references, and excluded studies that did not use intussusception and where valuable statistical data were difficult to obtain. Event rate and risk ratio (RR) were estimated. Patency rates were investigated. The influence of motile sperms found in the epididymal fluid, anastomotic sides and sites on patency was evaluated. 273 articles were comprised in this analysis, and 25 observational studies were eventually included, with a total patient sample of 1400. The overall mean patency rate was 69.3% (95% confidence interval [CI] 64.6–73.6%; I2 = 63.735%). We conducted a meta-analysis of the factors affecting patency after microsurgical IVE, finding that the presence of motile sperms in epididymal fluid (RR = 1.52; 95% CI 1.18–1.97%; P = 0.001), anastomosing bilaterally (RR = 1.32; 95% CI 1.15–1.50%; P < 0.0001) and distally (RR = 1.42; 95% CI 1.09–1.85%; P = 0.009) lead to higher patency rates. IVE is an effective treatment for EOA. The presence of motile sperms found in the epididymal fluid, anastomosing bilaterally and distally are significantly correlated with higher patency rates.
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