Document Detail

Blocking filter vents increases carbon monoxide levels from ultralight, but not light cigarettes.
MedLine Citation:
PMID:  9512084     Owner:  NLM     Status:  MEDLINE    
Effect of vent blocking on carbon monoxide (CO) exposure from a best-selling light cigarette was examined in 12 daily cigarette smokers. Mean CO boosts were not different from each other with (a) 0% filter vents blocked (5.0 ppm), (b) vents covered with lips (4.9 ppm), (c) 50% of vents covered with tape (4.8 ppm), and (d) vents covered with a pinch of the fingertips (4.9 ppm). A second study in another 12 smokers was conducted to replicate these findings as well as earlier findings that blocking vents doubles CO intake from 1-mg tar cigarettes. While blocking half the vents with fingers significantly increased CO boost from ultralight cigarettes (2.8 vs. 5.4 ppm, p < 0.001), it did not influence boosts from light cigarettes (6.3 vs. 6.5 ppm, p = 0.8). The lowest yield cigarettes (1 mg tar) may be special. Smoking machine simulations provide poor models of human smoke intake. It is unclear whether tar and nicotine intake from light cigarettes was influenced by vent blocking.
C T Sweeney; L T Kozlowski
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Publication Detail:
Type:  Clinical Trial; Journal Article    
Journal Detail:
Title:  Pharmacology, biochemistry, and behavior     Volume:  59     ISSN:  0091-3057     ISO Abbreviation:  Pharmacol. Biochem. Behav.     Publication Date:  1998 Mar 
Date Detail:
Created Date:  1998-05-05     Completed Date:  1998-05-05     Revised Date:  2004-11-17    
Medline Journal Info:
Nlm Unique ID:  0367050     Medline TA:  Pharmacol Biochem Behav     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  767-73     Citation Subset:  IM    
Department of Biobehavioral Health, The Pennsylvania State University, University Park 16802, USA.
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MeSH Terms
Carbon Monoxide / analysis,  blood*
Smoking / metabolism*
Reg. No./Substance:
630-08-0/Carbon Monoxide

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

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