Surgery – Truss – Pad
Patent
1991-12-31
1993-01-12
Shay, Randy C.
Surgery
Truss
Pad
128719, 128725, F61B 508
Patent
active
051781557
ABSTRACT:
A calorimeter for generating signals representative of the oxygen consumption and carbon dioxide production of a subject over a test period includes two flow sensors and a carbon dioxide scrubber connected to a patient mouthpiece. Interconnections are such that the air inhaled by the subject passes through one flow meter and the exhaled breath passes first through the other flow meter the carbon dioxide the scrubber and then through the first flow meter. The electrical output signals from the flow meters are provided to a microprocessor based computer which integrates the volume differences between the inhaled gas, and the exhaled gas after the carbon dioxide has been removed from it, over the period of the test. The inhaled volume less that part of the exhaled volume which does not constitute CO.sub.2 measures the oxygen comsumption per breath, the integral difference is a function of the patient's oxygen consumption over the period of the test. The computer also integrates the difference in flow volumes through the first and second sensors during an exhalation to calculate the subjects's CO.sub.2 production during the test.
REFERENCES:
patent: 2630798 (1953-03-01), White et al.
patent: 4917108 (1990-04-01), Mault
patent: 5038792 (1991-08-01), Mault
Reichle K.
Shay Randy C.
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