FIELD: medical engineering.
SUBSTANCE: device has chamber for accumulating carbon dioxide, bite-board and respiratory pipe. The chamber is manufactured as cylinder having conic bases arranged one in the other smoothly movable one relative to each other. The respiratory pipe with bite-board is available on one of external cylinder tips and single-acting valve with choker is available on the other tip allowing rotation for making resistance to expiration. Reservoir for collecting condensate is mounted on cylindrical surface the external cylinder. Pipe for taking air samples is available on distal external cylinder part cone base.
EFFECT: smoothly controlling expiration resistance and carbon dioxide concentration; enhanced effectiveness in separating air flows.
2 dwg, 1 tbl
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