目的 :探讨骨盆骨折后尿道损伤并发阳萎的机制及如何避免阳萎的发生。方法 :随访骨盆骨折后尿道损伤 18例与狭窄 2 5例的治疗效果。结果 :后尿道损伤 18例 ,采用会师牵引复位术治疗 ,2例发生阳萎 ( 11.1% ) ;陈旧性后尿道狭窄 2 5例 ,经各种手术修复尿道后 ,5例发生阳萎 ( 2 0 .0 % )。结论 :阳萎主要由骨盆骨折损伤勃起神经与血管及阴茎海绵体引起 ,伤后的手术操作及多次尿道复位或成形术 ,亦增加阳萎的发生率 Objective: To explore the mechanism of urinary tract injury and impotence after pelvic fracture and how to avoid the occurrence of impotence. Methods: 18 cases of urethral injury and 25 cases of stenosis after pelvic fracture were treated. Results: Eighteen cases of posterior urethral injury were treated with traction reduction and reduction, two cases had impotence (11.1%), twenty-five cases had old urethral stricture, and five cases had impotence (20 .0%). Conclusions: Impotence is mainly caused by erectile nerve damage caused by pelvic fractures and blood vessels and penis. Surgical operation and repeated urethral reduction or angioplasty also increase the incidence of impotence