Continuous positive airway pressure controller
US6634356B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 21, 2001 |
| Grant date | Oct 21, 2003 |
| Priority date | — |
| Expiry date | May 21, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M16/127
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A CPAP controller that supplies oxygen enriched air to a respiratory circuit that utilizes a venturi-jet arrangement within a chamber, which enriches ambient air. Ambient air is drawn into the chamber by a primary oxygen flow source via an oxygen jet that directs oxygen into the venturi. Besides the conventional ability to adjust oxygen/air ratio via changes in the primary oxygen flow source's flow rate adjustment, the oxygen/air ratio may be altered by way of a secondary oxygen supply and its own flow control adjustment that is independent of the primary oxygen source and its adjustment mechanism. Hence the oxygen/air ratio may be adjusted independently of the primary oxygen source's flow rate. The controller further includes a pressure adjustment mechanism that allows the user to adjust pressure to the demand and/or need of the patient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.