Title:
【発明の名称】双方向流量モニタを備えた呼吸熱量計
Document Type and Number:
Japanese Patent JP3043810
Kind Code:
B2
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 CO2 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 CO2 production during the test.
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Inventors:
Malt James Earl
Application Number:
JP51193193A
Publication Date:
May 22, 2000
Filing Date:
December 29, 1992
Export Citation:
Assignee:
Malt James Earl
International Classes:
A61B5/08; G01N25/20; A61B5/083; (IPC1-7): A61B5/08
Domestic Patent References:
| JP363035A | ||||
| JP5025395U |
Other References:
【文献】米国特許4917108(US,A)
Attorney, Agent or Firm:
Minoru Nakamura (6 outside)