To investigate the diagnostic parameters, criteria and diagnostic value of pelvic floor ultrasound in female stress urinary incontinence(SUI).

Simple factor logistic regression analysis was used to compare the difference of ultrasonic parameters between SUI patients(260 cases) and asymptomatic subjects(60 cases) to find the relevant diagnostic indexes, and to evaluate the diagnostic criteria and diagnostic value by the ROC curve.

There were significant differences in urethral inclination angle and levator hiatus area in resting and bladder neck position, bladder position, urethral inclination angle, retrovesical angle, levator hiatus area in Valsalva state and urethral rotation angle, bladder neck mobility between the two groups(all P<0.05). There was no significant difference in age, BMI, bladder neck position, bladder position, retrovesical angle between resting in the two groups (all P>0.05). Using the ROC curve analysis, the cut-off points of urethral inclination angle and levator hiatus area in resting, bladder neck and bladder position, urethral inclination angle, retrovesical angle, levator hiatus area in Valsalva, bladder neck mobility and urethra rotation angle to diagnose SUI were 16.5°, 13.5 cm², 3.5 mm, 0.5 mm, 29.5°, 139.5°, 19.5 cm², 24.5 mm, 45.5°, respectively. The sensitivity/specificity were 54.6%/66.7%, 49.2%/80.0%, 68.1%/95.0%, 64.2%/98.3%, 67.3%/93.3%, 73.5%/50.0%, 68.8%/81.7%, 70.0%/95.0%, 67.2%/85.0%, respectively. The area under the curve were 0.625, 0.668, 0.855, 0.854, 0.817, 0.622, 0.811, 0.866, 0.817, respectively.

Pelvic floor ultrasound is a better way to diagnose stress urinary incontinence, and it provides an objective basis for the diagnosis of SUI.

Ultrasonography; Pelvic floor; Urinary incontinence, stress