Document Detail

The effect of flow on the filtration performance of paediatric breathing system filters.
MedLine Citation:
PMID:  18086073     Owner:  NLM     Status:  MEDLINE    
The effect of flow on the filtration performance of six different types of filter intended for use in paediatric anaesthesia was measured by challenging the filters with sodium chloride particles at five different flows: 6, 10, 15, 20 and 30 l x min(-1). Twenty-five unused samples of each filter type were evaluated. The pressure drop across each filter was measured at the same flows as those used to measure penetration. The pressure drop varied both between and within the types of filter. Mean pressure drop varied between 89 and 262 Pa at a flow of 15 l x min(-1) for the six different filters. Penetration of sodium chloride particles varied from 1.9 to 18% at 15 l x min(-1) for the six filters. Allowing for the variation in pressure drop, the penetration of particles increased fairly linearly as flow increased for all six filter types. The increase in penetration per unit increase in flow varied from 0.11 to 0.82% per litre per minute. Over the range of flows studied, the increase in penetration with flow is fairly predictable.
A R Wilkes; C A Malan; J E Hall
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Anaesthesia     Volume:  63     ISSN:  1365-2044     ISO Abbreviation:  Anaesthesia     Publication Date:  2008 Jan 
Date Detail:
Created Date:  2007-12-18     Completed Date:  2008-01-15     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0370524     Medline TA:  Anaesthesia     Country:  England    
Other Details:
Languages:  eng     Pagination:  71-6     Citation Subset:  AIM; IM    
Department of Anaesthetics and Intensive Care Medicine, Wales College of Medicine, Cardiff University, Heath Park, Cardiff CF14 4XN, UK.
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MeSH Terms
Air Pressure
Anesthesia, Inhalation / instrumentation*
Cross Infection / prevention & control
Filtration / instrumentation*
Materials Testing / methods
Respiration, Artificial / instrumentation*
Sodium Chloride
Tidal Volume
Reg. No./Substance:
7647-14-5/Sodium Chloride

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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