Apparatus for supplying atmospheric air and at least one additional gas to a respirating subject
US6186143A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 3, 1997 |
| Grant date | Feb 13, 2001 |
| Priority date | — |
| Expiry date | Jun 3, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M16/101
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus for supplying air and at least one additional gas to a respirating subject has a container with an open end for receiving air, which is connected to a tubing system for conveying gas to the subject. The additional gas is supplied from an additional gas source via a metering system and a supply line to the container. As gas is supplied to the subject during inspiration phases by a compressor, air will flow into the container via the open end. At the same time a flow of additional gas is supplied to the container via a point of entry. During expiration phases gas will be diverted via a flow divider to flow back to the container via the supply line for the additional gas. A homogeneous and controllable concentration of additional gas is obtained within the container before each inspiration phase. The apparatus requires only a few components, making it a low cost apparatus, but it provides a good control of the concentration of additional gas supplied to the patient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.