Method for controlling an assist pump for fluid delivery...

Surgery – Cardiac augmentation – With condition responsive means

Reexamination Certificate

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Details

C417S019000, C417S020000, C417S043000, C417S356000

Reexamination Certificate

active

07150711

ABSTRACT:
Method for controlling an assist pump for fluid delivery systems with pulsatile pressure. If for example a heart assist pump is driven with a constant number of revolutions, it is achieved, that the blood is also delivered through the assist pump, even when the heart chamber is in the decontraction phase. With the present method it is achieved, that an assist pump only acts supportingly in the pressure phase of the main pump, in such a way, that the pressure difference between the input side and the output side of the assist pump is continuously determined and the number of revolutions of the assist pump is controlled in such a way, that the determined pressure difference does not fall below a predetermined value and the rate of flow does not sink below zero.

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