The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 22, 2002
Filed:
Aug. 02, 2000
James R. Mault, Evergreen, CO (US);
Edwin M. Pearce, Jr., San Francisco, CA (US);
Theodore W. Barber, Belmont, CA (US);
Craig M. Lawrence, Menlo Park, CA (US);
Timothy J. Prachar, Palo Alto, CA (US);
Jeffrey C. Weintraub, San Jose, CA (US);
Kevin S. Nason, Mountain View, CA (US);
HealtheTech, Inc., Golden, CO (US);
Abstract
The present invention provides an indirect calorimeter for measuring the metabolic rate of a subject. The calorimeter includes a respiratory calorimeter configured to be supported in contact with the subject so as to pass inhaled and exhaled gases as the subject breathes. A flow pathway is operable to receive and pass inhaled and exhaled gases. A first end of the flow pathway is in fluid communication with the respiratory connector and a second end is in fluid communication with a source and sink for respiratory gases. A flow meter generates electrical signals as a function of the instantaneous flow volume of inhaled and exhaled gases passing through the flow pathway. A component gas concentration sensor generates electrical signals as a function of the instantaneous fraction of a predetermined component gas in the exhaled gases as the gases pass through the flow pathway. A computation unit receives the electrical signals from the flow meter and the component gas concentration sensor and calculates at least one respiratory parameter for the subject as the subject breathes through the calorimeter.