DEVICE FOR MEASURING HUMAN RESPIRATORY MINUTE VOLUME Russian patent published in 2007 - IPC A61B5/08 A61B5/87 

FIELD: medicine.

SUBSTANCE: the present innovation deals with applying devices and instruments to measure volumetric air expenditure at human respiration. The suggested device for measuring human respiratory volume has got a rubber respirator that unites oral and nasal cavities and supplied with inhalation valve and expiration valve with a socket containing a connecting pipe which unites a socket of expiration valve with the cavity of a hermetically sealed sac located on the connecting pipe. The latter has got a tightly fixed support which comes beyond the connecting pipe with a ring that exceeds the diameter of the connecting pipe. The sac is made out of polyethylene. Sac's input foramen is made out of a tube. The ratio of external diameter of the connecting pipe against internal diameter of the tube provides hermetically sealed juncture of their surfaces and combines with the resistance to sliding of tube's internal surface against external surface of the connecting pipe that doesn't inhibit tube's own sliding down from the connecting pipe at the moment of sac's complete filling. The innovation enables to achieve the desired quickness and easiness in measuring the value of respiratory minute volume under industrial conditions.

EFFECT: higher accuracy of measuring.

1 dwg