输精管结扎、堵塞术有许多优点,但由于输精管被阻断,使不断产生的精子、睾网液、附睾液必然滞留于输精管近睾端及附睾管中。导致不同程度的附睾郁积,个别还发生附睾郁积症。故研究非阻塞性的输精管节育方法已成为国内、外关注的课题。实验证明,结扎后的输精管近睾端及尾部附睾管有明显扩张,上皮变薄,附睾主细胞出现微绒毛疏短,排列紊乱等结构变化,管腔内郁滞大量变性 Vasectomy, plugging has many advantages, but as the vas deferens are blocked, so that constantly produced sperm, testicular fluid, epididymal fluid inevitably stay in the vas deferens proximal and epididymal tube. Lead to varying degrees of epididymal stasis, individual epididymal syndrome also occurs. Therefore, the study of non-obstructive vas deferens birth control methods have become the focus of domestic and foreign issues. Experiments show that the ligation of the vas deferens proximal and caudal epididymal tuberculosis have significant expansion, thinning of the epididymis, main epididymal microvilli sparse, arranged in disorder and other structural changes, lumen a large number of degeneration