Metabolic calorimeter employing respiratory gas analysis
US6645158B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 23, 2002 |
| Grant date | Nov 11, 2003 |
| Priority date | — |
| Expiry date | Apr 23, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/0833
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An indirect calorimeter for measuring the metabolic activity of a subject includes a respiratory connector operative to be supported in contact with the subject so as to pass inhaled and exhaled gases therethrough as the subject breathes, and a flow tube forming a flow pathway for passing inhaled and exhaled gases therethrough, wherein one end of the flow tube is operatively connected to the respiratory connector and the other end of the flow tube is open, and a wall of the flow tube includes an opening. The indirect calorimeter also includes a flow meter adapted to generate a signal as a function of the instantaneous volume of inhaled and exhaled gases in the flow pathway that is in fluid communication with the flow pathway via the opening in the flow tube, and an oxygen sensor operative to generate a signal as a function of the instantaneous fraction of oxygen in the inhaled and exhaled gases in the flow pathway that is in fluid communication with the flow pathway via the opening in the flow tube. The indirect calorimeter further includes a processor for receiving the signals from the flow sensor and the oxygen sensor and using the signals to determine the oxygen consumption of t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.