Analysis of related factors affecting the maximum value of fast muscle contraction and average value of slow muscle contraction in electrophysiological assessment of pelvic floor after delivery

Objective To analyze the factors influencing the maximum value of fast muscle contraction and average value of slow muscle contraction in electrophysiological assessment of pelvic floor after delivery. Methods A total of 1 153 postpartum women who underwent pelvic floor electrophysiological assessment in the Second Affiliated Hospital of Nantong University and Yancheng Dafeng People's Hospital from January 2020 to February 2021 were selected, and their hospitalization information and delivery records were retrospectively analyzed. Results Among the 1 153 subjects, 576 were in the normal maximum value of fast muscle contraction group and 577 were in the abnormal group. Furthermore, there were 351 in the normal maximum value of slow muscle contraction group and 802 in the abnormal group. There were statistical differences between the normal average value of fast muscle contraction group and the abnormal group in gestational age, the proportion of vaginal delivery, the length of the first and second stages of labor, the proportion of perineal laceration, the rate of perineal lateral resection and the newborn birth weight during postpartum pelvic floor electrophysiological evaluation (P<0.05). There were statistical differences between the normal average value of slow muscle contraction group and the abnormal group in prenatal BMI, triglyceride level, the proportion of forceps assisted delivery, the proportion of vaginal delivery, the length of second labor, the proportion of perineal laceration and newborn birth weight (P<0.05). Conclusions Prenatal education during pregnancy can avoid overdue pregnancy and control fetal weight. Strengthening the management of labor process, avoiding long labor process and improving delivery technology may play a certain role in reducing postpartum pelvic floor injury.