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Three-Dimensional Transperineal Ultrasonography for Diagnosis of Female Occult Stress Urinary Incontinence

Yitong Yin, Zhijun Xia, Xiaoyu Feng, Meng Luan, Meiying Qin

(Department of Obstetrics and Gynecology, Pelvic Floor Disease Diagnosis and Treatment Center, China Medical University Affiliated Shengjing Hospital, Shenyang, Liaoning, China (mainland))

Med Sci Monit 2019; 25:8078-8083

DOI: 10.12659/MSM.917086


BACKGROUND: We evaluated the utility of three-dimensional transperineal ultrasonography in detecting occult stress urinary incontinence in women undergoing anterior pelvic floor reconstruction surgery for severe cystocele.
MATERIAL AND METHODS: We enrolled 207 women with stage III-IV cystocele without urinary stress incontinence. One week before the operation, the patients underwent pelvic floor ultrasonography. We measured the vertical distance between the bladder neck and posterior margin of the pubic symphysis, the posterior vesicourethral angle, the urethral rotation angle, the formation of funnel shape, the hiatus area, and the length of the urethra and the funnel shape. Postoperatively, the patients were evaluated for symptoms of stress urinary incontinence and with the 20-minute pad test.
RESULTS: The posterior vesicourethral angle with Valsalva maneuver, the difference in the posterior vesicourethral angle between the resting state and with the Valsalva state, and the angle of the proximal urethra were larger in the incontinence-positive group than in the incontinence-negative group (P<0.05). Funnel shape urethra was longer in the incontinence-positive group than in the incontinence-negative group (P<0.05). The cutoff value was 137.5° for the posterior vesicourethral angle with Valsalva maneuver, 39.5° for the difference in the posterior vesicourethral angle, 44.5° for the angle of the proximal urethra, and 0.35 cm for the length of the funnel shape. Multivariate analysis revealed that the difference between the posterior vesicourethral angle in the resting state and with Valsalva, the angle of the proximal urethra, and the length of funnel shape were strongly correlated with occult stress urinary incontinence.
CONCLUSIONS: Ultrasonography is an effective method for identifying occult stress urinary incontinence.

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