TABLE 1

The patient’s pulmonary function test results

	Predicted normal value	Lower limit of normal	Our patient’s values
	Predicted normal value	Lower limit of normal	Before bronchodilator	% of predicted normal value	After bronchodilator^a	% of predicted normal value	Change
FVC	3.17 L	2.44 L	2.66 L	84%	2.73 L	86%	3%
FEV₁	2.61 L/sec	1.96 L/sec	1.98 L/sec	75%	2.25 L/sec	86%	15%^b
FEV₁/FVC	83.30%	72.62%	73.67%	88%	82.41%	98%	10%

↵a Bronchodilator = 4 puffs of albuterol (360 μg).
↵b Clinically significant based on reversibility guidelines of ≥ 12% of baseline.^1,2
FEV₁ = forced expiratory volume in 1 second; FVC = forced vital capacity