Surgery – Respiratory method or device – Means for supplying respiratory gas under positive pressure
Patent
1988-08-18
1991-01-22
Burr, Edgar S.
Surgery
Respiratory method or device
Means for supplying respiratory gas under positive pressure
A61M 1600
Patent
active
049862685
ABSTRACT:
An apparatus for automatically controlling an artificial respirator includes sensors for receiving the exhaust gas from a patient and providing data signals corresponding to the concentration of the carbon dioxide and oxygen in the gas. The data signals are provided to a microcomputer which, together with data representing at least the patient's lung elastance factor, air viscosity factor in the lungs and barometric pressure, and when the patient is in exercise, metabolic rate ratio, determines the total ventilation and frequency for the patient's next breath and provides data output signals corresponding thereto. The data output signals from the microcomputer are provided, in analog form, to a signal generator and timing control circuit. This circuit provides output pulses which control the respirator and control valves between the respirator and the sensors.
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Burr Edgar S.
Lewis Aaron J.
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