ATS GUIDELINES Bundle

Routine Lung Function Tests

American Thoracic Society Quick-Reference GUIDELINES Apps

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10 Figures Volume of gas containing CO measured by the dilution of an inert tracer gas in the inspired volume (V A ) Measured carbon monoxide concentration change over time (K CO ) • Incomplete lung expansion   ▶ e.g., failure to take deep breath, neuromuscular dysfunction • Localized loss of lung volume   ▶ e.g., pneumonectomy • Loss of alveoli capillary structure with loss of lung volume   ▶ e.g., emphysema, interstitial lung disease (ILD) Figure 6. Approach to Interpretation of D L CO

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