精索静脉曲张。多发生于20～30岁的男性青年,约有15～20%男青年患此病。是男性不育的重要因素,其主要原因有以下几个方面:一、精索静脉曲张,可使血液回流受阻,造成睾丸萎缩。精索静脉曲张的患者,约95%以上发生左侧。这是由于左右两侧精索静脉的解剖学差异所造成的。一般情况下.右侧的精索静脉呈钝角斜行入下腔静脉.血液容易回流。而左侧的精索静脉呈直角流入左肾静脉以致血液回流时受阻,睾丸缺血缺氧和发生酸碱度改变,造成睾丸萎缩,影响精子的衍生过程。二、精索静脉曲张,可使睾丸温度升高,抑制精子 Varicocele. Occurs more in young men aged 20 to 30, about 15 to 20% of young men suffering from the disease. Male infertility is an important factor, the main reasons for the following aspects: First, varicocele can block the blood backflow, resulting in testicular atrophy. About 95% of patients with varicoceles occur on the left. This is due to the anatomical differences between the varicocele on the left and right sides. Under normal circumstances the right side of the spermatic cord oblique obtuse into the inferior vena cava blood easily refluxed. The right side of the left spermatic vein into the left renal vein at right angles so that when the blood flow obstruction, testicular ischemia and hypoxia and changes in pH, resulting in testicular atrophy, affecting the sperm’s derivation process. Second, varicocele, testicular temperature can increase, inhibit sperm