Surgery – Cardiac augmentation – Aortic balloon pumping
Patent
1987-06-29
1989-01-03
Coven, Edward M.
Surgery
Cardiac augmentation
Aortic balloon pumping
A61B 2500
Patent
active
047949104
ABSTRACT:
A medical appliance driving apparatus has pressure regulating control valves connected to positive and negative pressure sources and an isolator having an input chamber and an output chamber which are defined by a moveable membrane. The input chamber is connected to the pressure regulating control valves. An output valve is connected to the output chamber of the isolator, and a microcomputer is provided for switching the control valves to the positive pressure side or the negative pressure side and controlling the operation of the output valve. When the control valves are activated to provide positive pressure the output valve is opened, the positive pressure which is supplied to the input chamber causes the moveable membrane to move in a direction in which the medical appliance is inflated. After a predetermined period of time the output valve is closed to maintain the pressure supplied to the medical appliance as it is, and the control valves are switched to provide negative pressure to the input chamber of the isolator. Accordingly, the input side of the isolator can be communicated with the negative pressure source while the medical appliance is maintained in the inflated state. Thus it is possible to quickly switch the state of the medical appliance from inflation of deflation. A similar sequence is followed to change from deflation to inflation.
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Aisin Seiki Kabushiki Kaisha
Coven Edward M.
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