Device for generating by means of ejector action a continuous positive airway pressure (CPAP) during spontaneous breathing
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United States of America Patent
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Mar 16, 1993
Grant Date -
N/A
app pub date -
Jul 23, 1991
filing date -
Dec 6, 1988
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A device for generating by ejector action a continuous positive airway pressure (CPAP), comprising a breathing-channel which at one end opens into the atmosphere and at another end is adapted to be provided with an attachment device to the nose and/or mouth of the patient. An inlet channel is connected with the breathing-channel at a point between its ends for fresh gas, the flow of which may be adjusted to obtain an adjustable positive pressure within the breathing-channel. The breathing channel (10) has a first branch-channel (11) which is connectable to the attachment device and a second branch-channel (12) which opens into the atmosphere, the two branch-channels together forming an acute angle (A) of 30.degree.-50.degree. with each other. The inlet channel (13) is situated in the extension of the first branch-channel (11) and is connected to the second branch-channel (12) in such a manner that the stream of fresh gas is directed mainly co-axially into the first branch-channel, producing an ejector action.
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