A standard specification for the speed of response of urethral pressure measuring apparatus

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Abstract
Urethral pressure profiles are now being recorded using a variety of methods. The main methods in use employ catheter tip pressure transducers, fluid-filled balloons coupled to remote pressure transducers, or open tubes coupled to remote transducers with a fluid infusion source. Published comparisons between these methods have often been unhelpful because the performance of the measuring system has been inadequately specified. This paper considers the poorer speed of response to rise in pressure exhibited by the fluid infusion systems and proposes a minimum acceptable performance of 200 cm of water pressure per second at a catheter withdrawal rate of 1 cm per second. This figure may be derated in proportion to the withdrawal rate.