A practical and reliable method for measuring ethane and pentane in expired air from humans.
A practical and reliable method for measuring ethane and pentane in expired air from humans.
复制标题
一种实用可靠的方法,用于测量人体呼出气体中的乙烷和戊烷。
DOI:
10.1016/s0891-5849(99)00095-7
复制
发表时间:
1999
影响因子:
7.4
通讯作者:
F. Viteri
中科院分区:
文献类型:
--
作者:
M. Knutson;A. Lim;F. Viteri
We describe a method for the collection of expired air and further document the performance of our analytical technique that is used to measure ethane and pentane simultaneously. Four minutes of breathing hydrocarbon-free air before collection effectively removed high concentrations of residual ambient ethane and pentane from the lungs, with washout times up to 30 min resulting in no further reductions in breath hydrocarbons. Mean (±SE) exhalation rates (pmol/kg b.wt./min) in 11 subjects were 2.4 ± 0.6 for ethane and 1.5 ± 1.3 for pentane. Total intraindividual variability in exhalation rates (as percent coefficient of variation, %CV), measured from 4 subjects on at least 6 different days, was greater for pentane (44% CV) than for ethane (29% CV). Analytical variability contributed 6% to the total %CV. Advantages of the method are described, and reasons for the large variability in values reported in the literature are discussed.
DOI:
10.1159/000457292
发表时间:
1983
期刊:
Developmental pharmacology and therapeutics
影响因子:
--
作者:
Roberts,RJ;Rendak,I;Bucher,JR
通讯作者:
Bucher,JR
影响因子:
6.5
作者:
Springfield,JR;Levitt,MD
通讯作者:
Levitt,MD
影响因子:
2.9
作者:
Lawrence,GD;Cohen,G
通讯作者:
Cohen,G