FIELD: medical engineering. SUBSTANCE: device has labyrinth canals produced as partitions movable relative to each other to vary additional dead space volume and the resulting gas concentration in alveolar air. Deflectors are mounted in the labyrinth canals to reduce turbulence of exhaled air and improve its stratification into portions to enable one to increase carbon dioxide concentration and oxygen deficiency in alveolar air. EFFECT: controllable carbon dioxide concentration. 4 dwg, 1 tbl
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