Value of the pudendal nerves terminal motor latency measurements in the diagnosis of occult stress urinary incontinence

作     者：ZHU Lan HAI Ning LANG Jing-he YU Shi-yun LI Bin WONG Felix 

作者机构：Department of Obsterics and Gynecology Peking Union Medical College Hospital Peking Union Medical College Beijing 100730 China 

出 版 物：《Chinese Medical Journal》 (中华医学杂志（英文版）)

年 卷 期：2011年第124卷第23期

页      面：4046-4049页

核心收录：

学科分类：0710[理学-生物学] 090601[农学-基础兽医学] 1002[医学-临床医学] 07[理学] 09[农学] 0906[农学-兽医学] 071002[理学-动物学] 

主　　题：pelvic organ prolapse stress urinary incontinence occult pudendal nerves terminal motor latency 

摘      要：Background Occult stress urinary incontinence may lead to de novo stress urinary incontinence after pelvic floor repair surgery. A measurement of pudendal nerve terminal motor latency can reflect the integrity of the nerves. We aimed to explore the value of pudendal nerve terminal motor latency in the diagnosis of occult stress urinary incontinence in pelvic organ prolapse patients. Methods Ten patients with stress urinary incontinence （SUI group）, 10 with SUI and uterine or vaginal prolapse （POP＋SUI group） and 10 with uncomplicated uterine or vaginal prolapse （POP group） were evaluated for their pudendal nerve terminal motor latency using a keypoint electromyogram. Results The amplitude of positive waves was between 0.1 and 0.2 mV. The nerve terminal motor latency was between 1.44 and 2.38 ms. There was no significant difference in the wave amplitudes of pudendal nerve evoked action potential among the three different groups （P 〉0.05）. The pudendal nerve latency of the SUI group, POP＋SUI group and POP group were （2.9_＋0.7） seconds, （2.8_＋0.7） seconds and （1.9_＋0.5） seconds respectively. The difference between the SUI group and POP＋SUI group was not statistically significant （P 〉0.05）, whereas the difference between the SUI and POP groups and between the POP＋SUI and POP groups were statistically significant （P 〈0.05）. There was a positive correlation between pudendal nerve latency and the severity of SUI; the correlation coefficient was 0.720 （P 〈0.01）. Conclusions Patients with SUI may have some nerve demyelination injuries in the pudendal nerve but the damage might not involve the nerve axons. The measurement of pudendal nerve latency may be useful for the diagnosis of SUI in POP patients.