respiratory dead space


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respiratory dead space

[′res·prə‚tȯr·ē ′ded ‚spās]
(physiology)
That part of the respiratory system which has no alveoli and in which little or no exchange of gas between air and blood takes place.
References in periodicals archive ?
* The purpose of the study was to investigate the effects of implementing additional respiratory dead space during cycloergometry-based aerobic training on respiratory exchange ratio and carbon dioxide production.
The effect of additional dead space on respiratory exchange ratio and carbon dioxide production due to training
First, an obvious difference between mask wear and non-wear is respiratory dead space. It has been shown, in horses (7,14,18) and humans, (26) that increased dead space during exercise results in increased [V.sub.T] but not necessarily reduced [f.sub.R], (3) resulting in variable effects on alveolar ventilation.
Incremental exercise test performance with and without a respiratory gas collection system
Alveolar ventilation was used because the pulmonary minute ventilation includes mixed exhaled breath that contains both alveolar (end-tidal) gas and inhaled gas from the respiratory dead space where there is no gas exchange.
Human physiologic factors in respiratory uptake of 1,3-butadiene. (Articles)
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