Question

What increase in FEV1 in post-bronchodilator spirometry is needed to confirm reversibility of an obstructive pattern?

1) 10
2) 12
3) 15
4) 20

Answer 1

The increase in FEV1 in post-bronchodilator spirometry needed to confirm reversibility of an obstructive pattern is 12% or greater.

Step-by-step explanation:

The increase in FEV1 in post-bronchodilator spirometry needed to confirm reversibility of an obstructive pattern is generally considered to be 12% or greater. Therefore, the correct answer is option 2) 12.