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Clinical evaluation of a simple uroflowmeter for categorization of maximum urinary flow rate

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 rec...

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Detalles Bibliográficos
Autores principales: Pridgeon, Simon, Harding, Christopher, Newton, Douglas, Pickard, Robert
Formato: Texto
Lenguaje:English
Publicado: Medknow Publications 2007
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2721516/
https://www.ncbi.nlm.nih.gov/pubmed/19675784
http://dx.doi.org/10.4103/0970-1591.32058
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author Pridgeon, Simon
Harding, Christopher
Newton, Douglas
Pickard, Robert
author_facet Pridgeon, Simon
Harding, Christopher
Newton, Douglas
Pickard, Robert
author_sort Pridgeon, Simon
collection PubMed
description 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 (Q(max)) 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 V(void) twice daily for seven days. RESULTS: A single office reading in 46 men using the device showed good agreement with standard measurement of Q(max) for V(void) > 150 ml (Kappa = 0.68). All 14 men whose void reached the top chamber had standard Q(max) > 15 ml s(−1) (PPV = 100%, NPV = 72%) whilst eight of 12 men whose void remained in the bottom chamber had standard Q(max) < 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 Q(max) 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 Q(max) < 15 ml s(−1).
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spelling pubmed-27215162009-08-12 Clinical evaluation of a simple uroflowmeter for categorization of maximum urinary flow rate Pridgeon, Simon Harding, Christopher Newton, Douglas Pickard, Robert Indian J Urol Original Article 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 (Q(max)) 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 V(void) twice daily for seven days. RESULTS: A single office reading in 46 men using the device showed good agreement with standard measurement of Q(max) for V(void) > 150 ml (Kappa = 0.68). All 14 men whose void reached the top chamber had standard Q(max) > 15 ml s(−1) (PPV = 100%, NPV = 72%) whilst eight of 12 men whose void remained in the bottom chamber had standard Q(max) < 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 Q(max) 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 Q(max) < 15 ml s(−1). Medknow Publications 2007 /pmc/articles/PMC2721516/ /pubmed/19675784 http://dx.doi.org/10.4103/0970-1591.32058 Text en © Indian Journal of Urology http://creativecommons.org/licenses/by/2.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Article
Pridgeon, Simon
Harding, Christopher
Newton, Douglas
Pickard, Robert
Clinical evaluation of a simple uroflowmeter for categorization of maximum urinary flow rate
title Clinical evaluation of a simple uroflowmeter for categorization of maximum urinary flow rate
title_full Clinical evaluation of a simple uroflowmeter for categorization of maximum urinary flow rate
title_fullStr Clinical evaluation of a simple uroflowmeter for categorization of maximum urinary flow rate
title_full_unstemmed Clinical evaluation of a simple uroflowmeter for categorization of maximum urinary flow rate
title_short Clinical evaluation of a simple uroflowmeter for categorization of maximum urinary flow rate
title_sort clinical evaluation of a simple uroflowmeter for categorization of maximum urinary flow rate
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2721516/
https://www.ncbi.nlm.nih.gov/pubmed/19675784
http://dx.doi.org/10.4103/0970-1591.32058
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