Spirometry Interpretation Calculator
Interpret spirometry (pulmonary function test) results to identify obstructive or restrictive ventilatory patterns.
Patient Information
Pre-Bronchodilator Values
Post-Bronchodilator Values
Interpretation
Normal
No Impairment
FEV1
76%
of predicted
FVC
88%
of predicted
FEV1/FVC
75%
Normal
Bronchodilator Response
FEV1 Change
10% (300 mL)
Significant Response
No
Significant = ≥12% AND ≥200 mL improvement
Interpretation
Spirometry values are within normal limits.
Predicted Values
Predicted FEV1: 3.96 L
Predicted FVC: 4.53 L
Disclaimer: This calculator uses simplified prediction equations. Interpretation should be made by qualified healthcare professionals in clinical context. Full pulmonary function testing may be needed for complete evaluation.