Linked Life Data

9753255

Source:http://linkedlifedata.com/resource/pubmed/id/9753255

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
9
pubmed:dateCreated
1998-10-9
pubmed:abstractText
The influence of the method alveolar air collection on measurements of trace gas concentration has received little attention. We measured the concentrations of H2, CH4, CO, and CO2 in sequential fractions of alveolar air collected with and without breath-holding. Without breath-holding, the concentration of these gases increased appreciably as increasing quantities of alveolar air were expelled. Twenty seconds of breath-holding markedly reduced this nonhomogeneity of alveolar air. Prediction of the excretion rate of trace gases from measurements of their concentration relative to CO2 and literature values for resting CO2 excretion underestimated the true excretion rate. We conclude that breath-holding prior to sample collection enhances the reproducibility of trace gas measurements. When calculating the rate of excretion of trace gases, the use of literature values for resting ventilation or CO2 excretion may result in appreciable underestimations of the true rate.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0163-2116
pubmed:author
pubmed:issnType
Print
pubmed:volume
43
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1938-45
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
1998
pubmed:articleTitle
Influence of method of alveolar air collection on results of breath tests.
pubmed:affiliation
Research Service, Minneapolis VA Medical Center, Minnesota 55417, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S.