Spirometry Interpretation

Question 1

What would the FEV1, FVC and FEV1/FVC ratio be in obstructive lung disease?

Answer 1

Reduced FEV1 (<80% of the predicted normal)
Reduced FVC (but to a lesser extent than FEV1)
FEV1/FVC ratio reduced (<0.7)

Question 2

What would the FEV1, FVC and FEV1/FVC ratio be in restrictive lung disease?

Answer 2

Reduced FEV1 (<80% of the predicted normal)
Reduced FVC (<80% of the predicted normal)
FEV1/FVC ratio normal (>0.7)

Question 3

How to test difference between asthma and COPD in spirometry?

Answer 3

Beta agonist reversibility testing
Asthma is often fully reversible, whereas COPD is only partially or not reversible