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Lookup NU author(s): Dr Simon Pridgeon, Rob Pickard
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Objective: To evaluate the accuracy and diagnostic usefulness of a disposable flowmeter consisting of a plastic funnel with a spout divided into three chambers. Materials and Methods: Men with lower urinary tract symptoms (LUTS) voided sequentially into a standard flowmeter and the funnel device recording maximum flow rate (Qmax ) and voided volume (V void ). The device was precalibrated such that filling of the bottom, middle and top chambers categorized maximum input flows as 10, 10-15 and > 15 ml s-1 respectively. Subjects who agreed to use the funnel device at home obtained readings of flow category and Vvoid twice daily for seven days. Results: A single office reading in 46 men using the device showed good agreement with standard measurement of Qmax for Vvoid > 150 ml (Kappa = 0.68). All 14 men whose void reached the top chamber had standard Qmax > 15 ml s-1 (PPV = 100%, NPV = 72%) whilst eight of 12 men whose void remained in the bottom chamber had standard Qmax < 10 ml s-1 (PPV = 70%, NPV = 94%). During multiple home use by 14 men the device showed moderate repeatability (Kappa = 0.58) and correctly categorized Qmax in comparison to standard measurement for 12 (87%) men. Conclusions: This study suggests that the device has sufficient accuracy and reliability for initial flow rate assessment in men with LUTS. The device can provide a single measurement or alternatively multiple home measurements to categorize men with Qmax < 15 ml s -1.
Author(s): Pridgeon SW, Harding C, Newton D, Pickard RS
Publication type: Article
Publication status: Published
Journal: Indian Journal of Urology
Year: 2007
Volume: 23
Issue: 2
Pages: 114-118
Print publication date: 01/07/2007
ISSN (print): 0970-1591
ISSN (electronic): 1998-3824
URL: http://dx.doi.org/10.4103/0970-1591.32058
DOI: 10.4103/0970-1591.32058
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