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Lookup NU author(s): Dr Michael DrinnanORCiD,
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Aims: In the development of a non-invasive method for estimating isovolumetric intravesical pressure (P-ves,P-isv) We looked for a relationship between intra-abdominal pressure (p(abd)) and general build, expressed as body mass index (BMI) in men with lower urinary tract symptoms (LUTS). Materials and Methods: In 100 consecutive male patients undergoing an invasive pressure flow study (PFS) the p(abd) was recorded continuously during filling and voiding. The magnitude at four set points was measured: before filling, after filling, during voiding and at the end of voiding. Patients' weight (kg) and height (in) were also recorded and their BMI (weight/height(2)) was calculated. Results: During the fill/void cycle p(abd) increased during bladder filling from 37 +/- 7 cm H2O (mean +/- SD) to 38 +/- 8 cm H2O, fell during voiding to 35 +/- 9 cm H2O before increasing to 36 +/- 8 cm H2O at the end of voiding. There was a clear relationship between the individual values Of p(abd) and BMI (correlation co-efficient = 0.52) and to a lesser extent weight (correlation coefficient = 0.42). The relationship with BMI was clarified by separating the subjects into groups of normal, overweight and obese. Conclusions: A clear relationship between BMI and p(abd) was demonstrated, but because of the difficulties in quantifying it for an individual, it is impractical to apply an adjustment to non-invasive estimates of P-ves,P-isv. (C) 2003 Wiley-Liss, Inc.
Author(s): McIntosh S, Drinnan M, Griffiths C, Robson W, Ramsden P, Pickard R
Publication type: Article
Publication status: Published
Journal: Neurourology and Urodynamics
Print publication date: 01/01/2003
ISSN (print): 0733-2467
ISSN (electronic): 1520-6777
Publisher: Wiley-Blackwell Publishing
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