Linked Life Data

15672846

Source:http://linkedlifedata.com/resource/pubmed/id/15672846

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2005-1-27
pubmed:abstractText
We quantified the influence of lapsed time, measurement of gas-transfer factor (TLCO), and passive smoking on expired carbon monoxide (CO) levels, and then evaluated the accuracy of smoking histories against expired CO measurements in patients newly attending 'occupational' compared with 'general' chest clinics. Expired CO levels had an estimated average rate of decline of 3.4 ppm/h in the presumed absence of further smoking, though individual rates depended necessarily on the initial levels (2.1, 3.9, 5.7 and 7.5 ppm/h, respectively, when the initial levels were 10, 20, 30 and 40 ppm). TLCO measurement was associated with a median increase in expired CO of 4.0 ppm, but passive exposure to tobacco smoke in non-smokers had negligible effect. Expired CO levels indicative of current smoking (> 8 ppm) were noted much more commonly in the current cigarette smokers (88%) than those who claimed to be current non-smokers (6.0%), but without significant difference between the non-smokers attending the occupational and general clinics (6.6% vs 5.3%). We conclude that the lapse of 1 h and the measurement of TLCO exert mild but important influences on the expired CO level, but that passive smoking does not. 'Occupational' and 'general' patients give similarly false declarations of current non-smoking when presenting initially for clinical evaluation.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0954-6111
pubmed:author
pubmed:issnType
Print
pubmed:volume
99
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
32-8
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2005
pubmed:articleTitle
Relation of expired carbon monoxide to smoking history, lapsed time, TLCO measurement and passive smoking.
pubmed:affiliation
Department of Respiratory Medicine, Regional Unit for Occupational Lung Disease, Royal Victoria Infirmary, Queen Victoria Road, University of Newcastle upon Tyne, NE1 4LP, UK.
pubmed:publicationType
Journal Article, Evaluation Studies