Pulsatile blood pump
First Claim
1. An extravascular pulsation blood pump, comprisinga first conduit for connecting the pulsation blood pump to a heart chamber,a second conduit for connecting the pulsation blood pump to a blood vessel,a bidirectional pumping system which is arranged for alternately sucking blood through the first conduit and simultaneously ejecting blood through the second conduit, on the one hand, and sucking blood through the second conduit and simultaneously ejecting blood through the first conduit, on the other hand, anda control means which is provided for operating the pumping system alternately in one and the other direction according to a given cardiac rhythm.
1 Assignment
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Accused Products
Abstract
An extravascular pulsation blood pump possesses a bidirectionally acting pumping system (P, M) having a pump (P) which is connected via a first conduit (L1) to the left ventricle (LV) and via a second conduit (L2) to the aorta (AO). By means of a control means (St), the pump (P) is operated alternately in one and the other direction according to a given cardiac rhythm, so that alternately blood is sucked through the first conduit (L1) and simultaneously blood ejected through the second conduit (L2) to the same extent, on the one hand, and blood is sucked through the second conduit (L2) and simultaneously blood ejected through the first conduit (L1), on the other hand. The pulsation blood pump combines the functions and advantages of an extravascular copulsation pump with those of an extravascular counterpulsation blood pump.
21 Citations
15 Claims
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1. An extravascular pulsation blood pump, comprising
a first conduit for connecting the pulsation blood pump to a heart chamber, a second conduit for connecting the pulsation blood pump to a blood vessel, a bidirectional pumping system which is arranged for alternately sucking blood through the first conduit and simultaneously ejecting blood through the second conduit, on the one hand, and sucking blood through the second conduit and simultaneously ejecting blood through the first conduit, on the other hand, and a control means which is provided for operating the pumping system alternately in one and the other direction according to a given cardiac rhythm.
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9. A method for supporting the pulsation of a heart, comprising the following steps:
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a) removing a first quantity of blood from the heart and bringing a second quantity of blood into a blood vessel substantially during a diastole of the heart, b) removing a quantity of blood corresponding to the second quantity from the blood vessel and bringing a quantity of blood corresponding to the first quantity into the heart substantially during a systole of the heart following the diastole, and c) repeating the steps a) and b) a plurality of times, characterized in that the first and second quantities of blood are removed and brought in by means of the same pumping system. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification