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Diffusing capacity of the lung for carbon monoxide (DLCO) (squares) decreases with incomplete inhalations of the test gas. Diffusing capacity of the lung.

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Presentation on theme: "Diffusing capacity of the lung for carbon monoxide (DLCO) (squares) decreases with incomplete inhalations of the test gas. Diffusing capacity of the lung."— Presentation transcript:

1 Diffusing capacity of the lung for carbon monoxide (DLCO) (squares) decreases with incomplete inhalations of the test gas. Diffusing capacity of the lung for carbon monoxide (DLCO) (squares) decreases with incomplete inhalations of the test gas. For example, if the patient is not coached to inhale maximally to total lung capacity (TLC), the alveolar volume (VA) may only be 80% of TLC and the measured DLCO will be reduced by about 10%. On the other hand, incomplete lung expansion (due to neuromuscular disease, chest wall restriction, or simply poor inspiratory effort during a DLCO test) causes a relatively large increase in the transfer coefficient (KCO) (circles). (From Reference 43, with permission.)‏ Albert Miller, and Paul L Enright Respir Care 2012;57: (c) 2012 by Daedalus Enterprises, Inc.

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