...E. A. Harris; P. R. Buchanan; R. M. L. Whitlock 1. Incomplete mixing of alveolar gas may be expressed as an equivalent alveolar dead space serving a remaining alveolar space in which mixing is regarded as complete. Calculation of this dead space during multiple-breath, inert gas wash-in or wash-out...

... a distribution curve which is skewed to the right, the mode of which represents the usual value of dead space. The minimum and maximum values were found by excluding 2.5% of data points at each end of the distribution. 3. The values of minimum, mode and maximum in men were 67.6, 147 and 300 ml. For women...

... with a nitrogen washout method, once before administration of atropine and then 20 min and 60 min thereafter. 3. After the administration of atropine there was a reduction in tidal volume, a slight increase in frequency of respiration and an increase in series dead space. The tidal mixing volume showed a fall...

...E. A. Harris; Eve R. Seelye; R.M.L. Whitlock 1. Data have been combined from three previous series to provide revised standards for the prediction of physiological dead-space volume ( V D ), arterial oxygen tension ( P a,o 2 ), alveolar-to-arterial oxygen-tension difference ( P a,o 2 - P a,o 2...

...Christine A. Bradley; E. A. Harris; Eve R. Seelye; R. M. L. Whitlock 1. Physiological dead-space volume ( V D ) was measured in twenty-four healthy men and women aged from 20 to 71 years, at rest and at two rates of work on a treadmill, whilst breathing air and breathing oxygen. 2. The effect...