Regarding pulmonary function test all are TRUE, EXCEPT
Correct Answer: FEV1 is forced expiratory rate at one minute
Description: Changes in lung function tests in obstructive lung diseases- Eg: Emphysema
TLC- Increase
RV- Increase
FRC- Increase
Peak expiratory flow rate- Decrease
FEV1- Decreased out of proportion to FVC (Forced vital capacity)
Forced expiratory vital capacity (FEVC)- Normal to slightly decreased
FEV1/FEVC- Decreased (May decrease as low as 20-30%)
Changes in lung function tests in restrictive lung diseases
TLC- Decreased
RV- Decreased
FRC- Decreased
Forced mid expiratory flow rate- Decrease
FEV1- Decreased in proportion to FVC (Forced vital capacity)
Forced vital capacity (FVC)- Decreased
FEV1/FEVC- Near normal or increased.
Lung compliance- decreased
Diffusion capacity- decreased
FEV1- Forced expiratory volume in 1 second.
Category:
Physiology
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