forced expiratory volume

(redirected from FEV1)
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forced expiratory volume

[¦fȯrst ik¦spī·rə‚tȯr·ē ′väl·yəm]
(medicine)
During the performance of a forced vital capacity measurement, the volume of exhaled gas over a specific time interval.
References in periodicals archive ?
5 * Gender (M/F) 10/1 26/7 Duration of Illness 5 (3-10) # 6 (2-20) # Smoking (Y/N) 10/1 23/10 FEV1 1.
7] Symptoms of pulmonary impairment generally do not occur in persons with chronic lung disease until FEV1 has fallen to 50% of normal values.
The decline in FEV1, FVC and PEF is correlated with the manual metal arc welding process significantly in contrast to metal inert gas techniques.
Low level of thyroid hormones secondary to the negative feedback control of TSH may cause respiratory muscle weakness and decreased contractile strength result in decreased values for FVC, FEV1, PEF, and other flow rates in untreated hypothyroid females as compared to treated hypothyroids and healthy controls.
The present study was designed to see the effect of vitamin D supplementation in the improvement of symptoms of bronchial asthma in terms of FEV1.
The annual decline of FEV1 for each category is shown in [Table 2] and [Figure 1]d.
The time when the greatest percent of decline in FEV1 from baseline occurred in the footballers was as follows: 16 of 32 (50%) experienced the greatest decline in FEV1 at 5 minutes post-exercise; 14 of 32 (43.
Regression coefficients are provided for FVC, FEV1, FEV1/FVC, FEF25%-75%, and PEF (peak expiratory flow).
The ratio between the FEV1 and FVC should be calculated.
FVC and FEV1 were found to be significantly lower than predicted for brick workers thereby suggesting restrictive or obstructive pattern of disease.
We considered lung function to be impaired if FEV1 Less than 80% or FVC Less than 80% (of the predicted value/ (Schikowski et al.