Apparatus for supplying atmospheric air and at least one additional gas to a respirating subject
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United States of America Patent
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-
Feb 13, 2001
Grant Date -
N/A
app pub date -
Jun 3, 1997
filing date -
Jun 19, 1996
priority date (Note) -
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status (Latency Note)
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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.
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