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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 ?
9) TB: Tuberculosis Table 2: Actual and percent predicted (% predicted) values of PFT at different follow-up duration in TB-treated persons (n=118) Post-TB duration FVC (L) FEV1 (L) FEV1/FVC (%) Immediate Actual 2.
reported study on respiratory muscle strength in hypothyroidism found that there was a decreased level of FVC, FEV1, and PEFR were significantly lower in hypothyroid subjects, but flow rates and instantaneous flows were not studied.
Both the Groups were followed in terms of FEV1 at one month, two months and three months where final outcome was seen.
Furthermore, incidence of atrial fibrillation was higher in patients who had severe airflow obstruction with an FEV1 less than 50%18.
As shown in other studies, the FEV1 and FVC in African-Americans are smaller than in Caucasians of similar height, while the FEV1/FVC% is the same.
This is a measurement of small airway volume and may be decreased before any changes in the FEV1 or clinical symptoms are seen (Jat, 2013; Patra, 2012).
Dynamic lung volumes included FVC, FEV1, FEV1 / FVC ratio and FEF25-75.
Negative correlations were found among MDA, Cu, Zn, FEV1, and FVC values in exacerbation and control subjects (p<0.
The exact parameters included in the test can vary somewhat from instrument to instrument; but three parameters, FVC, FEV1, and FVC/FEV1, are universal, and two others, FEF25-75 and maximum flow, are included in most cases.