Résumé
Objective To investigate the characteristics of transperineal pelvic ultrasounds among middlelate gestational women and study the the correlation between middle-late gestation and stress urinary incontinence.Methods Seventy-four pregnant women at a gestation of 14-40 weeks were divided into the incontinence group (n =34) and the non-incontinence group (n =40).The bladder neck angle,the bladder neck rotation angle,the bladder neck movement degrees,the posterior urethra-vesical angle,and the urethral rotation angle at both inactivity and maximum Valslva activity were evaluated by pelvic ultrasound.The acquired data were treated and analyzed with t-test and correlation analysis with with P ＜ 0.05 considered statistically significant.Results Compared with the non-incontinence group,the bladder neck rotation angle,BND,bladder neck angle and posterior urethra-vesical angle during the maximum Valsalva activity in the incontinence group were all significantly larger (P ＜ 0.05).A moderate correlation between urethral rotation angle and gestation week in the incontinence was observed (P ＜ 0.05).Conclusion The changes of the supportive structures around bladder urethreal tissues in middle-late gestation women are obvious.The urethral rotation angle becomes larger with the gestation going on.