Frederice Claudia Pignatti, Amaral Eliana, Ferreira Néville de Oliveira
Department of Obstetrics, School of Medical Sciences, State University of Campinas - UNICAMP, Campinas, São Paulo, Brazil.
J Obstet Gynaecol Res. 2013 Jan;39(1):188-94. doi: 10.1111/j.1447-0756.2012.01962.x. Epub 2012 Jul 29.
To evaluate pelvic floor muscle (PFM) function and its association with urinary symptoms in the third trimester of pregnancy.
A cross-sectional study was conducted among 91 nulliparous women at 30-34 weeks of pregnancy. PFM was evaluated by surface electromyography (sEMG) and manual muscle testing, while urinary symptoms were identified by interview. Chi-square and Fisher's exact tests were used to analyze proportions and Mann-Whitney test was used to analyze differences in means.
Average sEMG values were 4.8 µV for basic tonus (BT), 19.2 µV for maximum voluntary contraction (MVC), and 12.9 µV for average sustained contraction (ASC), and 48.4% presented muscle strength grade 3. Nocturia was reported by 80.2%, followed by increased daytime frequency (59.3%), stress urinary incontinence (50.5%), and urge urinary incontinence (25.3%). No association was found between urinary symptoms and MVC or ASC or PFM manual tested strength.
No association was observed between PFM function and urinary incontinence, except decreased BT among late third trimester pregnant women with irritative bladder symptoms.
评估妊娠晚期盆底肌肉（PFM）功能及其与泌尿系统症状的相关性。
对91名妊娠30 - 34周的未产妇进行横断面研究。通过表面肌电图（sEMG）和手法肌力测试评估PFM，通过访谈确定泌尿系统症状。采用卡方检验和Fisher精确检验分析比例，采用曼 - 惠特尼检验分析均值差异。
基础张力（BT）的平均sEMG值为4.8微伏，最大自主收缩（MVC）为19.2微伏，平均持续收缩（ASC）为12.9微伏，48.4%的人肌肉力量等级为3级。80.2%的人报告有夜尿症，其次是白天尿频增加（59.3%）、压力性尿失禁（50.5%）和急迫性尿失禁（25.3%）。未发现泌尿系统症状与MVC、ASC或PFM手法测试力量之间存在关联。
除了晚期妊娠伴有膀胱刺激症状的孕妇基础张力降低外，未观察到PFM功能与尿失禁之间存在关联。
