respiratory dead space


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res·pi·ra·to·ry dead space

that part of the respiratory tract or of a single breath that fails to exchange oxygen and carbon dioxide with pulmonary capillary blood; a nonspecific term that fails to distinguish between anatomic dead space and physiologic dead space.
References in periodicals archive ?
(2010) The effect of training with additional respiratory dead space on hematological elements of blood.
Lung function studies; the respiratory dead space. Am J Physiol 1948; 154: 405-416.