Abstract

Objective To study the variation of the urogenital hiatus dimension in late pregnancy women by three-dimensional(3D) pelvic floor ultrasonography,to provide imaging evidence in the study of the relationship between pregnancy and pelvic floor dysfunction diseases.Methods Twenty nulliparas and forty late pregnancy women were examined by 3D pelvic floor ultrasonography to obtain the image of urogenital hiatus in which anteroposterior diameter of urogenital hiatus (AP),left to right diameter of urogenital hiatus (LR) and area of urogenital hiatus (HA) were measured and compared.AP,LR and HA were also compared between the late pregnancy women with stress urinary incontinence symptom and those without stress urinary incontinence symptom.Results AP,LR and HA in late pregnancy women were greater than those in nulliparas(all P <0.05) and had no difference between the late pregnancy women with stress urinary incontinence symptom and those without stress urinary incontinence symptom(all P >0.05).Conclusions 3D pelvic floor ultrasonography is an effective imaging method to observe pelvic support in pregnancy women. Key words: Ultrasonography,three-dimensional; Pelvic floor; Urogenital hiatus; Pregnancy trimester,third

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