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forced expiratory volume in 1 sec.

Forced expiratory volume (FEV1)

The maximum amount of air expired in one second.


References in periodicals archive ?
In the overall population : Mean improvements from baseline in FEV1 at 12 weeks (and mean percent change in FEV1) were: 280 ml (18 percent) dupilumab 300 mg Q2W; 310 ml (18 percent) dupilumab 200 mg Q2W; 120 ml (6 percent) placebo.
The second co-primary endpoint consisted of the comparison between the fixed dose combinations of aclidinium/formoterol 400/12mcg and 400/6mcg versus formoterol alone in change from baseline in morning pre-dose trough FEV1 at week 24.
In the premedication test, the patient demonstrated his personal best FVC and FEV1.
In this study, FEV1 was reported to be an important marker in determining the mortality and survival rate (14,15,16,17,18,19,20,21,22).
Moreover, we feel that the very few patients who have not yet demonstrated FEV1 improvement after these breathing exercises will do so by persistent practice, as clinically they are already demonstrating increased exercise tolerance.
Four had abnormal spirometry with significant bronchodilator response, another five had normal resting spirometry but had significant drop in FEV1 at exercise testing, and the remaining nine had normal spirometry and no drop in FEV1 post exercise.
It is concluded that azithromycin reduces pulmonary exacerbation but does not have much effect on FEV1 in children with cystic fibrosis who receive it continuously for 6 months.
The BODE index discriminates between high and low risk of death more accurately than FEV1 alone (Celli et al 2004).
Subjects with an increasing number of childhood disadvantage factors had a lower level of FEV1, and the prevalence of COPD was substantially increased.
4 micrograms per liter--had about 4 percent lower FEV1 values than did the tenth of participants with the lowest blood concentrations--averaging 0.
Results: High vitamin E intake was associated with the greatest FEV1.