The impact of tension‐free vaginal tape on the urethral closure function: Mechanism of action. Issue 1 (8th November 2013)

• Record Type: Journal Article
• Authors: Saaby, Marie‐Louise; Klarskov, Niels; Lose, Gunnar
• Is Part Of: Neurourology and urodynamics. Volume 34:Issue 1(2015:Jan.)
• Page Start: 50
• Page End: 54
• Publication Date: 2013-11-08
• Subjects: Urinary organs -- Periodicals; Urodynamics -- Periodicals; Urology -- Periodicals; 616.6
• DOI: 10.1002/nau.22513
• Languages: English
• ISSNs: 0733-2467

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <sec id="nau22513-sec-0001" sec-type="section"> <title>Aim</title> <p>To investigate if the tension‐free vaginal tape (TVT) works by increasing the abdominal to urethral pressure impact ratio (APIR).</p> </sec> <sec id="nau22513-sec-0002" sec-type="section"> <title>Methods</title> <p>Twenty one women with urodynamically proven stress urinary incontinence (SUI) were assessed by ICIQ‐SF, pad‐weighing test, incontinence diary and Urethral Pressure Reflectometry (UPR) before and after TVT. UPR was conducted during resting and increased intra‐abdominal pressure (P<sub>Abd</sub>) by straining. Related values of P<sub>Abd</sub> and urethral opening pressure (P<sub>o</sub>) were plotted into an abdomino‐urethral pressuregram. Linear regression of the values was conducted, and the slope of the line was found. The slope expresses the ratio of pressure increase in the urethra compared to the pressure increase in the abdomen and was called APIR.</p> </sec> <sec id="nau22513-sec-0003" sec-type="section"> <title>Results</title> <p>The urethral opening pressure at rest (P<sub>o‐rest</sub>) was unchanged after TVT, while APIR increased in all women (from 0.7 to 1.4, <italic>P</italic> < 0.0001).</p> </sec> <sec id="nau22513-sec-0004" sec-type="section"> <title>Conclusions</title> <p>The TVT seems to strengthen the urethral closure function by increasing the APIR while P<sub>o‐rest</sub> is unchanged regardless of the type of pre‐operative dysfunction. This confirms the theory of TVT's mechanism of action being mid‐urethral support. <italic>Neurourol. Urodynam. 34:50–54, 2015</italic>. © 2013 Wiley Periodicals, Inc.</p> </sec> </abstract>