Forced expiratory volume in 6 s (FEV6) is used as a surrogate for FVC
there is much evidence that FEV6 is equivalent to FVC and is easier to measure (1,2)
FEV6 may improve reproducibility with no significant loss of sensitivity or specificity
an electronic device for FEV1 measurement (FEV1 meter) is the same size as a peak flow meter and can be used for examination anywhere. Measurement can be performed easily and immediately; the device can be used to promote pulmonary function test and for screening purposes. The precision of the device has been assessed for FEV1 in pulmonary diseases
an electronic handy device for FEV1 and FEV6 measurement (FEV1/FEV6 meter) has been developed
a meta-analysis concluded that FEV(1)/FEV(6) is a sensitive and specific test for the diagnosis of airway obstruction. FEV(1)/FEV(6) can be used as a valid alternative for FEV(1)/FVC in the diagnosis of airway obstruction (3)
Reference:
1) Enright RL, Connett JE, Bailey WC. The FEV1/FEV6 predicts lung function decline in adult smokers. Respir Med 2002;96: 444-449.
2) Akpinar-Elci M et al. FEV6 as a surrogate for FVC in detecting airways obstruction and restriction in the workplace. Eur Respir J 2006;27: 374-377.
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