[The functional characteristics of an additional dead space and a respirator for preparing hypoxic-hypercapnic...

A study was made of the characteristics of respiration recorded during the use of a respirator for preparing hypoxic hypercapnic mixtures as compared to the use of an additional "dead" space. In both cases, there was a significant increase of total ventilation, largely at the expense of respiration deepening. However, during respiration via a respiratory mask, the increase of the minute respiratory volume was accompanied by a rise of alveolar ventilation whereas during respiration via the ADS, alveolar ventilation dropped. Hyperventilation did not entail CO2 washing out from the blood and hypocapnia development during respiration via the mask and ADS. The differences revealed may appear helpful for respiration training at the hospital. In this case, an appropriate outfit should be sorted out for each patient on an individual basis.