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# Significance of Results (1 of 2) This document discusses the significance of results from a pulmonary function test. Normal FEV₁ = 5.6 L for a typical 20-year-old man. * **FEV₁ (Forced Expiratory Volume in 1 second):** * Reduced with *both* obstructive and restrictive lung disease. (Note:...

# Significance of Results (1 of 2) This document discusses the significance of results from a pulmonary function test. Normal FEV₁ = 5.6 L for a typical 20-year-old man. * **FEV₁ (Forced Expiratory Volume in 1 second):** * Reduced with *both* obstructive and restrictive lung disease. (Note: handwritten comment "Cant not tale deep breath in / Cause Fev₁ & /FVC &") * Reduced with obstructive disease. * Normal with restrictive disease. * **FEV₁/FVC Ratio:** * Reduced with obstructive disease. * Normal with restrictive disease. * **Other expiratory flow measures:** * Also reduced when obstructive lung disease is present. **Note:** The document includes handwritten notes ("Cant not tale deep breath in") and abbreviations (likely relating to pulmonary function measurements), but those comments are not part of the standard structured analysis and are included to avoid loss of information.