Linked Life Data

6817389

Source:http://linkedlifedata.com/resource/pubmed/id/6817389

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1983-2-14
pubmed:abstractText
Sensitivity and precision of the 13C-breath test were assessed by examining a couple of limiting factors caused by the sensitivity of the instrument used for 13CO2 analysis, endogenous fluctuation of 13CO2 abundance, and the residual CO2 in sample storing tubes, vacutainers, etc. For 13CO2 analysis, a mass spectrometer equipped with a dual inlet, a dual collector, and an automated pressure matching system, was used. 15 ml vacutainers were used for sample storage. Endogenous fluctuation of 13CO2 abundance, however, was measured by putting the breath samples directly into the evacuated CO2 purification system, instead of using vacutainers. Endogenous fluctuation (S.D. = 0.202%) was the most significant limiting factor, compared with instrumental limitation (0.085%), or with influence of the residual CO2 (0.136%). Consequently, the sensitivity of the 13C-breath test was figured out to be 0.52%. This sensitivity is about 1,000 times lower than that of 14C-breath test. The precision was linearly dependent on 13C increase from basal 13C observed after administration of 13C enriched compounds, delta 13C, and was determined to be expressed as 1.94 delta 13C.
pubmed:language
jpn
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0033-8303
pubmed:author
pubmed:issnType
Print
pubmed:volume
31
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
285-9
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1982
pubmed:articleTitle
[Sensitivity and precision of the 13C-breath test].
pubmed:publicationType
Journal Article, English Abstract