Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1975-4-11
pubmed:abstractText
Single breath oxygen measurements of closing volumes were performed in triplicate in 15 healthy nonsmoking young adults 3 times per day for 5 consecutive days. The purpose of the investigation was to determine the degree of variability in this test of lung function and, if possible, to specify its cause. The results demonstrated that sizable differences in the absolute volume for closing volume and for closing volume as a percentage of vital capacity can be present from trial to trial in any given person even though the technical aspects of the procedure are seemingly highly standardized. The reasons for this were found to be a combination of (1) the inherent variation in the expired volume that marked the onset of airway closure, (2) reader difficulties in detecting the onset of phase IV, and (3) variations in the expired vital capacity due to incomplete filling and/or emptying of the subject's lungs. The differences were not due to daily or diurnal rhythms or to a training effect.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0003-0805
pubmed:author
pubmed:issnType
Print
pubmed:volume
111
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
135-40
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1975
pubmed:articleTitle
Variability of closing volume measurements in normal man.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, U.S. Gov't, P.H.S.