Metabolic calorimeter employing respiratory gas analysis
US6899683B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2002 |
| Grant date | May 31, 2005 |
| Priority date | — |
| Expiry date | Jun 14, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/02438
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An indirect calorimeter for measuring the metabolic rate of a subject includes a disposable portion and a reusable portion. The disposable portion includes a respiratory connector configured to be supported in contact with the subject so as to pass inhaled and exhaled gases as the subject breathes. The disposable portion also includes a flow pathway operable to receive and pass inhaled and exhaled gases, having a first end in fluid communication with the respiratory connector and a second end in fluid communication with a source and sink for respiratory gases. The disposable portion is disposed within the reusable portion, which includes a flow meter, a component gas concentration sensor, and a computation unit. The flow meter generates a signal as a function of the instantaneous flow volume of respiratory gases passing through the flow pathway and the component gas concentration sensor generates a signal as a function of the instantaneous fraction of a predetermined component gas in the exhaled gases. The computation unit receives the electrical signals from the flow meter and the concentration sensor and calculates at least one respiratory parameter for the subject as the subject…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.