NEET MDS

The Power Course

In restrictive disease of lungs



Choices

1 ) FVC is increased
2 ) FEV1 decreased
3 ) FEV1/FVC 90%
4 ) None of the above

Explanation


FEV1 (forced expiratory volume in the first second)

The fraction of the VC expired during the first second of a forced expiration. ( FEV1 )

Forced vital capacity

The largest amount of air that can be expired after a maximal inspiratory effort. ( FVC ).

In normal healthy males FEV1/FVC is 80%

in restrictive disease of lungs, FVC is decreased but FEV1 is not. thus the ratio of FEV1/FVC increase.


Answer

FEV1/FVC 90%

Last Modified : 01-Jan-2020

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