| Avoid cruising on the uroflowmeter: evaluation of cruising artifact on spinning disc flowmeters in an experimental setup. | |
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MedLine Citation:
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PMID: 20879000 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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AIMS: The aim of our study was to access the variability of maximum flow rate (Q(max)), average flow rate (Q(av)) and flow pattern while varying the point of impact of flow on the flowmeter. METHODS: Water was delivered through a motorised tube holder in a standardised experimental set up. Flow was directed in 4 different directions on the funnel; 1) Periphery, 2) Base, 3) Centre and, 4) in a cruising motion from the periphery of the funnel to the centre and back again. The variation in the Q(max), Q(av) and the flow pattern were studied at 4 different flow rates. The variables recorded when the flow was directed at the centre of the funnel was taken as baseline. RESULTS: There was a significant difference in the Q(max) and Q(av)when the point of impact was at the periphery or in a cruising motion compared to the centre. The difference was more marked with cruising motion with a characteristic flow pattern. The maximum percentage difference in Q(av) was 4.1%, whereas the difference in Q(max) was higher at 16.6% on comparing crusing motion with the values from the centre. CONCLUSION: We have demonstrated a significant variation in Q(max), Q(av) and flow pattern with change in the point of impact on the flowmeter. Though the changes in Q(av) were statistically significant, the alteration in the recorded Q(max) values was more striking. Our study emphasizes the importance of combining Q(av) and flow pattern along with Q(max) in interpretation of results of uroflowmetry. |
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Authors:
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Sanjai Kumar Addla; Rajender Reddy Marri; Sai Lakshmi Daayana; Paul Irwin |
Publication Detail:
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Type: Comparative Study; Journal Article |
Journal Detail:
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Title: Neurourology and urodynamics Volume: 29 ISSN: 1520-6777 ISO Abbreviation: Neurourol. Urodyn. Publication Date: 2010 Sep |
Date Detail:
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Created Date: 2010-09-29 Completed Date: 2011-01-27 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8303326 Medline TA: Neurourol Urodyn Country: United States |
Other Details:
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Languages: eng Pagination: 1301-5 Citation Subset: IM |
Copyright Information:
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© 2010 Wiley-Liss, Inc. |
Affiliation:
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Royal Blackburn Hospital, East Lancashire Hospitals NHS Trust, Blackburn, United Kingdom. saddla@yahoo.co.uk |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Artifacts* Calibration Equipment Design Flowmeters* / standards Materials Testing Reproducibility of Results Rheology / instrumentation*, standards Urodynamics* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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