分娩方式对产后早期肛提肌收缩功能的影响

Impact of delivery mode on early postpartum levator muscle contraction function

目的探讨分娩方式对肛提肌收缩功能的影响。方法选择54名初产妇,其中剖宫产组26名和经阴道分娩组28名。对所选对象于产后6~8周行超声检查,比较两组在静息、缩肛状态时肛提肌裂孔水平夹角、长度、面积及肛提肌裂孔水平夹角改变量、肛提肌裂孔长度改变量、膀胱颈移动度、肛提肌裂孔面积改变量。结果静息状态时两组各参数差异均无统计学意义（P〉0.05）,缩肛状态时两组各参数差异均有统计学意义（P〈0.05）。两组缩肛状态下肛提肌裂孔水平夹角改变量、肛提肌裂孔长度改变量、膀胱颈移动度、肛提肌裂孔面积改变量差异均有统计学意义（P〈0.05）。结论选择性剖宫产对肛提肌收缩功能具有一定的保护作用。

Objective To explore the impact of delivery mode on early postpartum levator muscle contraction function.Methods Totally 54 primiparas were recruited,including elective caesarean section group（n=26）and vaginal delivery group（n=28）.Primipara underwent ultrasonography in 6—8 weeks after childbirth.Horizontal angle,length,hiatal area,horizontal angle change amount,length change,hiatal area changes of levator ani muscle and the degree of the movement of the bladder neck at resting,shrinkage anal state were measured and compared between two groups.Results The parameters at resting had no statistical significance between two groups（all P〉0.05）,but those at shrinkage anal state had statistical significance between two groups（all P〈0.05）.There were statistical difference between two groups in horizontal angle change,length change,hiatal area change of levator ani muscle and the movement of the bladder neck.Conclusion To some extent,elective caesarean section can protect levator muscle contraction function.