How Is Significant Clinical Airflow Limitation Determined from Pre- and Postbronchodilator

question 20

Multiple Choice

How is significant clinical airflow limitation determined from pre- and postbronchodilator spirometry?

• A)When the patient's FEF25-7% increases by 12% and 200 mL/second
• B)When the patient's FEV₁ increases by 12% and 200 mL
• C)When the FVC increases by 20% and 200 mL
• D)When the FEV₁/FVC ratio increases by 25%

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