Comparison of flowrates and voided volumes during non‐instrumented uroflowmetry and pressure‐flow studies in women with stress incontinence. Issue 6 (4th May 2014)

• Record Type: Journal Article
• Authors: Mueller, Elizabeth R.; Litman, Heather; Rickey, Leslie R.; Sirls, Larry; Norton, Peggy; Wilson, Tracey; Moalli, Pamela; Albo, Michael; Zimmern, Philippe
• Is Part Of: Neurourology and urodynamics. Volume 34:Issue 6(2015:Aug.)
• Page Start: 549
• Page End: 553
• Publication Date: 2014-05-04
• Subjects: Urinary organs -- Periodicals; Urodynamics -- Periodicals; Urology -- Periodicals; 616.6
• DOI: 10.1002/nau.22625
• Languages: English
• ISSNs: 0733-2467

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="nau22625-sec-0001" sec-type="section"> <title>Aims</title> <p>The Blaivas–Groutz nomogram defines voiding obstruction in women using Q<sub>max</sub> from the NIF and the maximum detrusor pressure (P<sub>detmax</sub>) from the PFS. The aim of this study was to understand the relationship between NIF and PFS maximum flow rates in women with stress incontinence.</p> </sec> <sec id="nau22625-sec-0002" sec-type="section"> <title>Methods</title> <p>We analyzed the UDS of 597 women with stress‐dominant urinary incontinence. Each subject underwent a NIF and then a PFS. Mixed model was used to test the hypothesis that the relationship between flow rates and voided volume (VV) were similar for NIF and PFS.</p> </sec> <sec id="nau22625-sec-0003" sec-type="section"> <title>Results</title> <p>There were 452 subjects with both NIF and PFS studies that met the inclusion criteria and had max flow rate (Q<sub>max</sub>) for both NIF and PFS. The mean age was 53. Overall, higher VV were observed during PFS compared to NIF and subjects had higher Q<sub>max</sub> with NIF compared to PFS. The relationship between Q<sub>max</sub> and VV was significantly different between NIF and PFS (<italic>P</italic> < 0.004). At 200 ml, NIF Q<sub>max</sub> was 14% higher than PFS Q<sub>max</sub> and this difference increased to 30% at 700 ml.</p> </sec> <sec id="nau22625-sec-0004" sec-type="section"> <title>Conclusion</title> <p>The difference between PFS Q<sub>max</sub> and NIF Q<sub>max</sub> increases as VV increase. As a result, values from PFS and NIF cannot be used interchangeably as has been suggested in the Blaivas–Groutz nomogram for obstruction in women. <italic>Neurourol. Urodynam. 34:549–553, 2015</italic>. © 2014 Wiley Periodicals, Inc.</p> </sec> </abstract>