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:
May. 31, 2005
Filed:
Jun. 10, 2002
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);
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
A method of determining a respiratory parameter for a subject using an indirect calorimeter is provided. The indirect calorimeter includes a respiratory connector for passing inhaled and exhaled gases, a flow pathway operable to receive and pass inhaled and exhaled gases having a flow tube within the flow pathway through which the inhaled and exhaled gases pass, a flow meter for determining an instantaneous flow volume of the inhaled and exhaled gases, a component gas concentration sensor for determining an instantaneous fraction of a predetermined component gas and a computation unit having a processor and a memory. The method includes the steps of initializing the indirect calorimeter and the subject breathing into the respiratory connector if the indirect calorimeter is initialized, sensing the flow volume of the inhaled and exhaled gases passing through the flow pathway using the flow meter and transmitting a signal representing the sensed flow volume to the computation unit. The method also includes the steps of sensing a concentration of a predetermined component gas as the inhaled and exhaled gases pass through the flow pathway using the component gas sensor, and transmitting a signal representing the sensed concentration of the predetermined component gas to the computation unit. The method further includes the steps of calculating at least one respiratory parameter for the subject as the subject breathes through the calorimeter using the sensed flow volume and the sensed concentration of the predetermined component gas, and providing the subject with the at least one respiratory parameter.