Impeller for catheter pump
First Claim
Patent Images
1. An impeller for a pump, the impeller comprising:
- a hub having a proximal end portion and a distal end portion;
a blade supported by the hub, the blade having a fixed end coupled to the hub and a free end, the impeller having a stored configuration when the impeller is at rest, a deployed configuration when the impeller is at rest, and an operational configuration when the impeller rotates in a rotational direction, the blade in the deployed and operational configurations extending away from the hub, and the blade in the stored configuration being compressed against the hub,wherein the blade in the operational configuration is deformed relative to the deployed configuration in a direction opposite to the rotational direction.
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Abstract
An impeller for a pump is disclosed herein. The impeller can include a hub having a fixed end and a free end. The impeller can also have a plurality of blades supported by the hub. Each blade can have a fixed end coupled to the hub and a free end. The impeller can have a stored configuration and a deployed configuration, the blades in the deployed configuration extending away from the hub, and the blades in the stored configuration being compressed against the hub.
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Citations
24 Claims
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1. An impeller for a pump, the impeller comprising:
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a hub having a proximal end portion and a distal end portion; a blade supported by the hub, the blade having a fixed end coupled to the hub and a free end, the impeller having a stored configuration when the impeller is at rest, a deployed configuration when the impeller is at rest, and an operational configuration when the impeller rotates in a rotational direction, the blade in the deployed and operational configurations extending away from the hub, and the blade in the stored configuration being compressed against the hub, wherein the blade in the operational configuration is deformed relative to the deployed configuration in a direction opposite to the rotational direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An impeller for a pump, the impeller comprising:
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a hub having a proximal end portion and a distal end portion; a blade supported by the hub, the blade having a fixed end coupled to the hub and a free end, the impeller having a stored configuration when the impeller is at rest, a deployed configuration when the impeller is at rest, and an operational configuration when the impeller rotates, the blade in the deployed and operational configurations extending away from the hub, and the blade in the stored configuration being compressed against the hub, wherein the blade has a higher stiffness at the free end of the blade than at the fixed end of the blade. - View Dependent Claims (15)
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16. An impeller for a pump, the impeller comprising:
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a hub having a proximal end portion and a distal end portion; a blade supported by the hub, the blade having a fixed end coupled to the hub and a free end, the impeller having a stored configuration when the impeller is at rest, a deployed configuration when the impeller is at rest, and an operational configuration when the impeller rotates, the blade in the deployed and operational configurations extending away from the hub, and the blade in the stored configuration being compressed against the hub, wherein the blade comprises a first blade angle defined near a distal end of the blade and extending between a plane perpendicular to the free end of the blade and a plane perpendicular to the hub, wherein the blade comprises a second blade angle defined near a proximal end of the blade and extending between a plane perpendicular to the free end of the blade and a plane perpendicular to the hub, and wherein the first blade angle is larger than the second blade angle.
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17. An impeller for a pump, the impeller comprising:
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a hub having a proximal end portion and a distal end portion; a blade supported by the hub, the blade having a fixed end coupled to the hub and a free end, the impeller having a stored configuration when the impeller is at rest, a deployed configuration when the impeller is at rest, and an operational configuration when the impeller rotates, the blade in the deployed and operational configurations extending away from the hub, and the blade in the stored configuration being compressed against the hub, wherein the blade has a suction side and a pressure side, the impeller further comprising a first fillet formed at the fixed end of the blade on the suction side of the blade, wherein the first fillet is sized and shaped to support the blade when the impeller rotates in an operational configuration. - View Dependent Claims (18)
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19. A percutaneous heart pump, the pump comprising:
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a catheter body; an impeller coupled to a distal end portion of the catheter body and having a stored configuration, a deployed configuration, and an operational configuration in which the impeller rotates about a rotational direction, the impeller comprising; a hub; a blade supported by the hub and having a front end portion and a back end portion, the blade including a ramped surface at the back end portion, the blade in the operational configuration deformed relative to the deployed configuration in a direction opposite to the rotational direction; and a sheath disposed about the catheter body and having a proximal end and a distal end, wherein the distal end of the sheath is configured to compress the blade from the deployed configuration to the stored configuration when the distal end of the sheath is urged against the ramped surface of the blade. - View Dependent Claims (20)
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21. A method for storing an impeller, the method comprising:
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urging a sheath against a ramped surface of a back end of a blade of an impeller, the impeller having one or more blades, the impeller having a stored configuration, a deployed configuration, and an operational configuration in which the impeller rotates about a rotational direction, each blade in the stored configuration compressed against a hub of the impeller and each blade in the deployed configuration extending away from the hub, the blade in the operational configuration deformed relative to the deployed configuration in a direction opposite to the rotational direction; and collapsing the blade against the hub to urge the impeller into the stored configuration. - View Dependent Claims (22, 23, 24)
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Specification