Surgery – Respiratory method or device – Ozone or ion generation
Patent
1977-12-23
1980-04-08
Bagwill, Robert E.
Surgery
Respiratory method or device
Ozone or ion generation
128214F, A61M 103
Patent
active
041967291
ABSTRACT:
An apparatus for perfusing the heart of a patient with oxygenated blood detects the blood pressure at the point of supply, usually the aortic root or a coronary blood vessel, and transmits this pressure to a pressure switch which controls a solenoid valve for recycling blood driven by a roller pump to the oxygenator, or, selectively, through a surge tank and to the point of supply within the patient's vascular system. The surge tank has an air cushion therein for holding essentially constant the pressure at which the blood is supplied to the patient, and, thus, for holding constant the pressure at the point of supply.
The system is fail-safe since the pressure switch can be connected to the solenoid so that blood is pumped to the surge tank and thence to the patient in the event of the failure of an electrical connection to the solenoid valve.
Provision is made for continuous feed of blood to the patient at a greater-than-normal rate should an emergency arise or for cutting off the flow of blood to the patient when desired.
REFERENCES:
patent: 3896803 (1975-07-01), Mason
patent: 3946731 (1976-03-01), Lichtenstein
patent: 4080966 (1978-03-01), McNally et al.
Cunningham Joseph N.
Nathan Ira M.
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