Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1993-01-12
1995-08-08
Burr, Edgar S.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
12820421, A61M 1600
Patent
active
054389801
ABSTRACT:
An apparatus (10) for controlling the pressure of a respiratory gas delivered to a patient includes a phase detection circuit (24) for determining the inhalation and exhalation phases of the patient's respiratory cycle. More particularly, a flow signal representative of the respiratory flow is compared to second signal, offset in time and scaled in magnitude relative to the flow signal, in order to determine the transition from one phase to the next.
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Burr Edgar S.
Lewis Aaron J.
Puritan-Bennett Corporation
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