Spirometry Bronchodilator Response Significance Calculator

Determine significant bronchodilator response: FEV1 or FVC increase ≥12% AND ≥200 mL from baseline per ATS/ERS 2022 criteria.

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Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Determine significant bronchodilator response: FEV1 or FVC increase ≥12% AND ≥200 mL from baseline per ATS/ERS 2022 criteria

Each component has a specific meaning:

  • Baseline per ATS/ERS 2022 criteria — The baseline per ats/ers 2022 criteria recorded for the scenario being assessed.

Note: Interpret the bd response result against the thresholds and context described above.

How to Use

Enter the baseline per ATS/ERS 2022 criteria for the scenario you are assessing. Determine significant bronchodilator response: FEV1 or FVC increase ≥12% AND ≥200 mL from baseline per ATS/ERS 2022 criteria. Use the bd response result to inform your calculation.

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Frequently Asked Questions