Surgery – Cardiac augmentation – With condition responsive means
Reexamination Certificate
2006-12-19
2006-12-19
Koczo, Jr., Michael (Department: 3746)
Surgery
Cardiac augmentation
With condition responsive means
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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Arndt Andreas
Deus Frank
Göttel Peter
Graichen Kurt
Hoffmann Jan
Berlin Heart AG
Koczo, Jr. Michael
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