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坏死的精子及脱落细胞,而且有向附睾头扩展的趋势。被郁滞精子的分解或被吞噬吸收,附 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, leading to varying degrees of epididymal stasis, some also occur Epididymis disease. Therefore, the study of non-obstructive vas deferens birth control method has become a topic of concern at home and abroad. Experiments show that the ligation of the vas deferens proximal and cauda epididymal tube were significantly expanded, the thinning of the epididymis main cells were microvilli sparse, arranged in disorder and other structural changes. Lumen a large number of degeneration and necrosis of sperm and exfoliative cells, but also to the epididymal head expansion trend. Depression is stagnant sperm decomposition or absorption by swallowing, attached