We are continuing to develop a non-invasive technique for measurement of bladder contraction pressure during voiding. The method involves progressive interruption of flow by inflation of a penile cuff, which gives continuous data of cuff pressure and flow rate up to the point where flow is interrupted. Previous work has demonstrated that cuff pressure during inflation is equivalent to urethral pressure, and that cuff pressure at interruption of flow correlates closely with isovolumetric bladder contraction pressure. We now present the results of plotting cuff pressure at interruption of flow against maximum flow rate for men classified as obstructed, equivocal or unobstructed according to the provisional ICS method for definition of obstruction.
Griffiths CJ, Rix D, Macdonald A, Robson W, Kelly L, Reddy M, Drinnan MJ, Pickard RS, Ramsden PD. Can non-invasive bladder measurements identify men with bladder outflow obstruction? Neurourol Urodynam 2000;19:429.
Clive J. Griffiths or Dr. Michael J. Drinnan, Freeman Unit, Newcastle upon Tyne. Tel: +44 (0)191-223-6161.
Regional Medical Physics Department, Freeman Hospital, Newcastle upon Tyne, NE7 7DN, UK.
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