Document Detail

The effect of pressure differential and care provider movement on airborne infectious isolation room containment effectiveness.
MedLine Citation:
PMID:  20864218     Owner:  NLM     Status:  In-Data-Review    
BACKGROUND: Airborne infectious isolation rooms (AIIRs) are maintained at a negative pressure relative to surrounding areas to prevent migration of potentially infectious droplet nuclei. Current US design standards require a pressure differential of only 2.5 Pascals (Pa), compared with 15 Pa in some other countries. The purpose of this work was to compare containment efficiency in a properly designed anteroom-equipped hospital AIIR at differential pressures ranging from 2.5 to 20 Pa under conditions of no provider traffic and simulated high provider traffic.
METHODS: Fluorescent microspheres were released into the AIIR to simulate infectious droplet nuclei. Airborne concentrations were measured inside the AIIR, in the anteroom, and at the corridor-anteroom door both with and without care provider movement through the AIIR under differential pressure conditions of 2.5, 11, and 20 Pa. Particles were collected by air sampling onto filters, with enumeration via fluorescent microscopy.
RESULTS: Reduced containment effectiveness during provider traffic was observed, consistent with previous studies. Containment increased with increasingly negative pressure differential and decreased with increasing provider traffic.
CONCLUSIONS: Provider traffic adversely affected containment. Containment improved with an increasing pressure differential. The anteroom plays an important role in limiting net particle escape, especially during provider movement through the space.
Noah J Adams; David L Johnson; Robert A Lynch
Related Documents :
19659088 - Formation of bubbles, blobs, and surface cusps in complex plasmas.
17677518 - Comment on "correlations between isobaric and isochoric fragilities and thermodynamical...
20860398 - How micropatterns and air pressure affect splashing on surfaces.
10936818 - Optimization of the size distribution and myocardial contrast effect of perfluorocarbon...
16763218 - Lung recruitment using oxygenation during open lung high-frequency ventilation in prete...
25307868 - Validity and reliability of an instrumented speculum designed to minimize the effect of...
Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  American journal of infection control     Volume:  39     ISSN:  1527-3296     ISO Abbreviation:  Am J Infect Control     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-03-01     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8004854     Medline TA:  Am J Infect Control     Country:  United States    
Other Details:
Languages:  eng     Pagination:  91-7     Citation Subset:  IM    
Copyright Information:
Copyright © 2011. Published by Mosby, Inc.
Department of Occupational and Environmental Health, University of Oklahoma College of Public Health, Oklahoma City, OK.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms

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

Previous Document:  Evaluation of an innovative antimicrobial surgical glove technology to reduce the risk of microbial ...
Next Document:  Provision and use of personal protective equipment among home care and hospice nurses in North Carol...