Relationship of postnatal pelvic floor muscle strength with delivery mode and delivery season
LIU Liu
ZHANG Yu
WEI Bing
WANG Wen-yan
Abstract：Objective To investigate the relationship between delivery mode, delivery season and postnatal pelvic floor muscle strength. Methods A total of 902 postpartum women, including 410 cases of cesarean delivery ( cesarean delivery group) and 492 cases of spontaneous delivery ( spontaneous delivery group) , were screened for pelvic floor muscle strength after childbirth. The pelvic floor muscle strength of all eligible pregnant women was measured, and the measure time was from 35 to 118 days postpartum. There were 191 cases of pregnant women in the spring, 231 in the summer, 233 in the autumn and 247 in the winter. Glazer protocol was used to measure surface muscle voltage of pelvic floor muscle. Results The maximum muscle voltage of pelvic floor muscle in 5 times of fast-contracting (Dmax) was (37. 01 ± 15. 65)μV in the cesarean delivery group, and (31. 98 ± 12. 56) μV in the spontaneous delivery group, and there was significant difference between these two groups(P <0. 01). The mean value of 60 s continuous contraction of pelvic floor muscles (H60 s) was (21. 74 ± 10. 71) μV in the cesarean delivery group, and (19. 06 ± 8. 87) μV in the spontaneous delivery group, and there was significant difference between these two groups(P<0. 01). The mean value of Dmax was(35. 99 ± 11. 10)μV among pregnant women in the spring,(34. 10 ± 13. 00) μV in the summer, (33. 45 ± 16. 86)μV in the au-tumn, and (33. 86 ± 14. 85)μV in the winter, and there was no significant difference among these groups (F=1. 256, P>0. 05). The mean value of H60 s was (24. 87 ± 8. 82) μV among pregnant women in the spring, (20. 74 ± 8. 83)μV in the summer, (17. 89 ± 10. 33)μV in the autumn and (18. 55 ± 9. 77)μV in the winter, and there was significant differ-ence among these groups (F=22. 721, P<0. 01). The mean value of H60 s of the women in the spring and summer was sig-nificant higher than that in the autumn(t=7. 386, 3. 193;all P<0. 01). If we took Dmax, H60 s, gravidity, delivery mode and the delivery seasons as the independent variable to make the multiple liner regression models, it showed that the deliv-ery mode was related with Dmax and H60 s(P<0. 01), and the delivery season was related with H60 s(P<0. 01). Conclu-sions The postnatal pelvic floor muscle strength is statistically related with delivery mode, and the postnatal pelvic floor muscle strength is higher in women with cesarean delivery than that with spontaneous delivery. The continuous contraction of pelvic floor muscles is related with the delivery season, which is high in the spring and summer.
Keywords：pelvic floor musclepelvic floor dysfunctionsurface electromyography of pelvic floor musclepostpartum womendelivery mode
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：3( 11-13 )