Respirator having a trigger sensitivity dependent on the patient gas flow
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United States of America Patent
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Dec 20, 1994
Grant Date -
N/A
app pub date -
Dec 18, 1991
filing date -
Dec 20, 1990
priority date (Note) -
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Abstract
A respirator has a bypass gas flow and respective valves in the inspiration and expiration lines for setting the gas flow through these lines. A control unit actuates the valves so that a respiratory cycle is produced and such that the bypass gas flow is maintained during expiration. The expiration pressure is identified by a pressure sensor. When this expiration pressure falls below a prescribed value, a new inspiration phase is triggered. To improve this triggering, the patient gas flow is identified by a flow meter, and the prescribed pressure value is varied dependent on the identified patient gas flow.
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