Urodynamic Stress Incontinence — Relationship Between Q-tip Test and Urethral Hypermobility
Citation(s)
Chen GD, Su TH, Lin LY Applicability of perineal sonography in anatomical evaluation of bladder neck in women with and without genuine stress incontinence. J Clin Ultrasound. 1997 May;25(4):189-94.
DeLancey JO Structural support of the urethra as it relates to stress urinary incontinence: the hammock hypothesis. Am J Obstet Gynecol. 1994 Jun;170(6):1713-20; discussion 1720-3.
Dietz HP Pelvic floor ultrasound: a review. Am J Obstet Gynecol. 2010 Apr;202(4):321-34. doi: 10.1016/j.ajog.2009.08.018. Review.
Lin KL, Juan YS, Lo TS, Liu CM, Tsai EM, Long CY Three-dimensional ultrasonographic assessment of compression effect on urethra following tension-free vaginal tape and transobturator tape procedures. Ultrasound Obstet Gynecol. 2012 Apr;39(4):452-7. doi:
Walters MD, Shields LE The diagnostic value of history, physical examination, and the Q-tip cotton swab test in women with urinary incontinence. Am J Obstet Gynecol. 1988 Jul;159(1):145-9.
Yun JH, Kim JH, Park S, Lee C Changes in the Q-tip angle in relation to the patient position and bladder filling. BMC Urol. 2015 Oct 7;15:101. doi: 10.1186/s12894-015-0096-4.
Relationship Between Q-tip Test and Urethral Hypermobility on Perineal Ultrasound for Women With Urodynamic Stress Incontinence
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