A - Human Necessities – 61 – B
Patent
A - Human Necessities
61
B
150/20, 324/25
A61B 5/08 (2006.01) A61B 5/087 (2006.01) G01F 1/36 (2006.01) G01F 1/40 (2006.01) G01N 33/497 (2006.01)
Patent
CA 1108039
Abstract A system for measuring the oxygen uptake and respiratory quotient of a patient which employs a high resistance gas flow path in parallel with a pneumotachograph. The high resistance path is connected to each side of the diaphragm of the pneumotachograph and a small chamber is included in the high resistance path at each end thereof adjacent its connection to the pneumotachograph. The volume of the high resistance path, together with its resistance relative to that of the pneumotachograph is chosen such that, during respiration of the patient employing the device, the high resistance tube will never be completely flushed through in one direction before flow starts in the opposite direction. The high resistance line is chosen to be a constant resistance such that the amount of flow therethrough is proportional to the flow through the pneumotachograph. Thus by sampling and analyzing a small portion of the the two chamber and measuring the amount of gas flow by the pneumotachograph, the exact amount of oxygen uptake can be calculated.
324064
Research Development Corporation
Smart & Biggar
LandOfFree
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