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Clinical Tip
• F E V p FVC, and the FEVj/FVC ratio are the most com-
monly interpreted PFT values. These measures represent
the degree of airway patency during expiration, which
affects airflow in and out of the lung.
• Predicted n o r m a l values for a person's given age, gen-
der, and height will be provided in the PFT report for ref-
erence to the person's actual PFT result.