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| Effects of different delivery modes of primiparas on anal sphincter complex, pelvic floor muscle strength, and sexual life |
| Guangyuan Central Hospital, Guangyuan, Sichuan Province, 628017 |
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Abstract To explore the effects of different delivery modes of primiparas on their anal sphincter complex, pelvic floor muscle strength, and sexual life. Methods: A total of 147 primiparas were selected and were divided into group A(84 cases with vaginal delivery)and group B(63 cases with cesarean section)according to different delivery modes between June 2020 and June 2021. The pelvic floor muscle strength and female sexual life quality questionnaire score of the primiparas in the 12th week after delivery were compared between the two groups. The three-dimensional ultrasound examinations of perineum and pelvic floor were conducted to evaluate the situation of the anal sphincter complexes of the primiparas in both groups, which included the proximal plane, middle plane, and distal plane of internal sphincter muscle of anus, the thickness of distal plane in external sphincter muscle of anus at 3, 6, 9 and 12 o'clock, the thickness of middle plane in puborectalis at 4 and 8 o'clock. The occurrence of postpartum complications of the primiparas was compared between the two groups. Results: The thickness of proximal plane in internal sphincter muscle of anus at 6 and 12 o'clock, and thickness of middle plane at 12 o'clock of the primiparas in group B were significantly higher than those of the primiparas in group A(P＜0.05). The thickness of distal plane in external sphincter muscle of anus at 12 o'clock of the primiparas in group B was significantly higher than that of the primiparas in group A(P＜0.05). The EMG values of type Ⅰ(12.36±1.40μV)and type Ⅱ muscle fibers(19.62±2.04μV)of the primiparas in group B were significantly higher than those(11.47±1.32μV and 17.78±2.45μV)of the primiparas in group A. The degrees of fatigue of type Ⅰand type Ⅱ muscle fibers(7.67±1.32 and 7.33±1.12)of the primiparas in group B were significantly lower than those(8.51±1.15 and 8.64±1.14)of the primiparas in group A(P＜0.05). The scores of female sexual life quality questionnaire of the primiparas in group B were significantly higher than those of the primiparas in group A(all P＜0.05). There was no significant difference in the incidence of postpartum complications(8.3% vs.6.3%)of the primiparas between the two groups(P＞0.05). Conclusion: Compared with those of vaginal delivery, cesarean section of the primiparas have less influence on their postpartum anal sphincter complex, pelvic floor muscle strength, and sexual life.
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