In the spirometry class, to achieve an accurate measurement of FEV 1 ,
FVC and forced expiratory ratio the subject must:

Question

In the spirometry class, to achieve an accurate measurement of FEV 1 ,
    FVC and forced expiratory ratio the subject must:

Answer

inspire as fast, as hard and as long as possible

Answer

perform tidal breathing for at least 1 min

Answer

inspire deeply before exhaling slowly

Answer

expire as fast, as hard and as long as possible

Answer

expire deeply before inhaling slowly

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