Objective: During pregnancy and childbirth, a series of remodeling processes may lead to the occurrence of pelvic floor dysfunction. Our aim was to explore the influence of different delivery methods on pelvic floor in primipara after delivery through three-dimensional (3D) ultrasound
examination. Method: A total of 48 primiparas were selected as the study object. Among which, 21 primiparas underwent cesarean section were selected as observation group, 27 primiparas in vaginal delivery were selected as the control group. The 3D ultrasound examination of pelvic floor
was carried out 6–8 weeks postnatally to observe and compare the prolapse of anterior, middle and posterior pelvic organs of parturient women in Valsalva movement. The posterior ureterovesical angel (PUA), urethral tilt angel (UTA), cervical mouth position (CMP), and bladder neck position
(BNP) were measured. The changes of hiatus of levator ani muscle in patients with anal constriction, rest and Valsalva were observed and measured. Result: Compared with the data in control group, the number of cases of anterior, middle and posterior pelvic organ exfoliation in observation
group was lesser, the UTA and BNP were higher, the CMP was lower, and the area of hiatus of levator ani muscle was smaller both at the time of calm, contraction and Valsalva movements. Conclusion: The damage of pelvic floor in primipara during transvaginal delivery is great. The 3D
ultrasound is an objective and simple imaging method to screen the diseases of pelvic floor dysfunction.
