Intracardiac pumping device
First Claim
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1. An intracardiac percutaneous blood pump comprising:
- a catheter having an outer diameter and proximal and distal regions;
a cannula coupled to the distal region of the catheter and configured to extend across a heart valve, the cannula comprising an expansible suction head with a blood inlet and having an initial state with a first outer diameter and an expanded state with a second outer diameter, the second outer diameter being larger than the first outer diameter and the outer diameter of the catheter;
an impeller for pumping blood into the blood inlet; and
a flexible atraumatic projection coupled to the expansible suction head, the flexible atraumatic projection being positioned distal to the expansible suction head and being configured to space the blood inlet away from interior heart walls;
wherein the flexible atraumatic projection has a fixed outer diameter when the expansible suction head is in the initial state and retains that fixed outer diameter when the expansible suction head is in the expanded state.
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Abstract
The invention relates to an intercardiac pump device comprising a pump (11) whose distal end (13) is connected to a cannula (15) which is provided with a suction head (16) for sucking blood. Said strainer is provided with a non-sucking extension (20) for stabilizing the position of said pump device in the heart and mechanically prolonging the cannula (15) without deteriorating hydraulic conditions. Said extension is also used in the form of a spacer in order to avoid that the suction head (16) adheres to a cardiac wall.
117 Citations
20 Claims
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1. An intracardiac percutaneous blood pump comprising:
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a catheter having an outer diameter and proximal and distal regions; a cannula coupled to the distal region of the catheter and configured to extend across a heart valve, the cannula comprising an expansible suction head with a blood inlet and having an initial state with a first outer diameter and an expanded state with a second outer diameter, the second outer diameter being larger than the first outer diameter and the outer diameter of the catheter; an impeller for pumping blood into the blood inlet; and a flexible atraumatic projection coupled to the expansible suction head, the flexible atraumatic projection being positioned distal to the expansible suction head and being configured to space the blood inlet away from interior heart walls; wherein the flexible atraumatic projection has a fixed outer diameter when the expansible suction head is in the initial state and retains that fixed outer diameter when the expansible suction head is in the expanded state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification