Electronically controlled respirator

Details Electronically controlled respirator Electronically controlled respirator

A - Human Necessities

61

M

326/1.7

A61M 16/00 (2006.01) A61M 16/20 (2006.01)

Patent

CA 1180393

TITLE ELECTRONICALLY CONTROLLED RESPIRATOR INVENTORS Abraham Boyarsky Jack Friedman Athanasios Christodoulopoulos Rock Lee ABSTRACT OF THE DISCLOSURE The breathing cycle of a patient is controlled to achieve proper ventilation and at the same time minimize the work of distension of the lungs. Oxygen enriched air is delivered to the patient during the inspiration period such that the pressure waveform is a ramp func- tion having initial and final values which are dependent on the resis- tance, compliance and alveolar volume of the lungs. The apparatus includes a source of oxygen enriched air at a regulated pressure and a pneumatically controlled pressure reducing valve for reducing the pressure of the oxygen enriched air for delivery to the patient. The valve is controlled by a transducer which converts an electrical con- trol signal into a pneumatic control signal. The electrical control signal which is generated by an electronic control circuit, is a func- tion of the parameters of the patient's lungs.

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