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closing volume

 

Definition: the lung volume at which the flow from the lower parts of the lungs becomes severely reduced or stops during expiration, presumably because of airway closure; measured by the sharp rise in expiratory concentration of a tracer gas that had been inspired at the beginning of a breath that started from residual volume.

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.

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