Changes And Analysis Of Influencing Factors Of Postpartum Pelvic Floor Muscle Strength

Pelvic organs and tissues are unified, the various components are independent and interrelated.Badder, urethra, vagina, uterus maintain their normal position relying on ligaments, fascia and the pelvic floor muscle.When the pelvic organ is weak or injuried by congenital or acquired factors,the position of pelvic organs will change.To a certain extent,pelvic support tissue relaxation (Relaxation of pelvic supports) often cause pelvic floor disorders(PFD),which mainly include pelvic organ prolapse(POP) and stress urinary incontinence (SUI) and impact on the quality of life of women. Currently,the research of the risk factors for PFD, mainly concentrated in the chronic increased abdominal pressure, pregnancy, childbirth, obesity, iatrogenic surgical injury.Among the factors,pregnancy and childbirth is an independent risk factor. The internal cause of PFD can be attributed to the injury of pelvic floor tissue and the decline of muscle strength.Pelvic floor muscle strength is a valuable electrophysiological indicators that can be used as indicators of the early diagnosis and risk factors of pelvic floor injury.In this paper, by screening the pelvic floor muscle strength of the1029cases of puepera,respectively,grouping them in accordance with mode of delivery, birth weight, the number of full-term delivery and the second stage of labor,we explore the changes and its influencing factors of postpartum pelvic floor muscle strength.Objectivewe analyzed the changes and influencing factors of pelvic floor muscle strength to postpartum women.Materials and Methods1ObjectsThere were totally1029healthy women who delivered in the Third Affiliated Hospital of Zhengzhou university from April2011to April2012involved in this study. All women underwent pelvic floor muscle strength screen in6weeks.2GroupingWe selected primipara who had normal birth weight newborns.They were divided into two groups according to the mode of delivery.The number of vaginal delivery was348and the cesarean section was402. We selected primipara who had cesarean section.They were divided into three groups according to the neonatal weight.The number of puerpera who delievered normal birth weight (2.5～4.0kg) neonate was402and the number bellow2.5kg was17,and the macrosomia(>4.0kg) was40. We selected primipara who had normal birth weight newborns by vaginal delivery.They were divided into three groups according to term delivery times. Respectively the number of puerpera who had1,2,3times full term delivery were348,78,9. We selected primipara who had normal birth weight newborns by vaginal delivery. They were divided into three groups (<1h group,1-2h group,>2h group) according to the second stage of labor.The number of cases of three groups, respectively were276,68and4.3Statistical analysisStatistical analysis were performed by using SPSS17.0software package,we used independent-sample t tests or F test to compare continuous variables and chi-square tests for proportions.The inspection standard is a=0.05.Results1In vaginal delivery group and cesarean section group,the rates of type I muscle fiber abnormal strength were39.9%and41.8%;the rates of type II muscle fiber abnormal strength were37.4%and40.3%.There were no significant difference between the two groups(P>0.05).2In low birth weight group,normal birth weight group and macrosomia group,the rates of type I muscle fiber abnormal strength were23.5%、38.6%and62.5%;the rates of type II muscle fiber abnormal strength were23.5%、38.8%and60.0%.There were significant differences in the three grous. There were significant differences between the third group and another(P<0.05).3Among the puepera who had1,2,3times full term delivery,respectively the rates of type I muscle fiber abnormal strength were26.4%,46.2%,66.7%,the rates of type II muscle fiber abnormal strength were25.9%,44.9%,66.7%.There were significant differences in the three groups.There were significant difference between the first group and another(P<0.05).4In the second stage of labor group,the rates of type I muscle fiber abnormal strength were31.5%、48.5%、100%; the rates of type II muscle fiber abnormal strength were30.8%%48.5%、100%.There were significant differences in the three groups. There were significant difference between the first group and another(P<0.05).ConclusionPregnancy and childbirth can weaken the pelvic floor muscle strength. Different types of delivery may not affect postpartum pelvic floor muscle strength. Neonate birth weight, the number of full-term pregnancy and the second stage of labor affect postpartum pelvic floor muscle strength.