Carbon dioxide-based Bi-level CPAP control
US6990980B2 · kind B2 · utility
88Cited by
124References
33Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 27, 2001 |
| Grant date | Jan 31, 2006 |
| Priority date | — |
| Expiry date | Oct 25, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2230/432
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A system and method of providing bi-level CPAP therapy is provided that incorporates an infrared carbon-dioxide sensor to determine whether a patient is inhaling or exhaling. Patient exhalation causes the infrared light to be absorbed, while patient inhalation reduces the presence of carbon-dioxide causes little or no absorption of carbon-dioxide. The level of carbon-dioxide in an associated patient breathing interface is monitored for thresholds that trigger higher CPAP pressure upon inhalation and lower CPAP pressure upon exhalation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.