Apparatus for driving intra-aorta balloon pump

Surgery – Cardiac augmentation – Aortic balloon pumping

Patent

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A61M 110

Patent

active

053000170

ABSTRACT:
An apparatus for driving an intra-aorta balloon pump is comprised of an isolator having a housing in which a first chamber and a second chamber are defined by a membrane, a positive pressure source which is in fluid communication with the first chamber via a first timing valve, a negative pressure source which is in fluid communication with the first chamber via a second timing valve, a space defined between the second chamber and the intra-aorta balloon pump and containing an amount of operating fluid, a tank for storing therein the operating fluid, an inlet valve interposed between the tank and the space, an exhaust valve interposed between the space and the atmospheric pressure, a sensor for measuring the pressure in the space, and a controller to be operated in such a manner that the first timing valve and the second timing valve are opened and closed alternately in order to establish an alternate supply of the positive and negative pressures to the first chamber and each time-duration during which the first timing valve is opened is set to be decreased gradually with the passing of time.

REFERENCES:
patent: 4796606 (1989-01-01), Mushika
patent: 4974774 (1990-12-01), Nakagawa et al.
patent: 5169379 (1992-12-01), Freed et al.

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