Impeller housing for percutaneous heart pump
First Claim
Patent Images
1. A catheter assembly for a heart pump, comprising:
- an elongate tubular member;
a hub coupled with a proximal end of the elongate tubular member;
a plurality of structural members forming a distal portion of an impeller housing;
a locking device disposed between the structural members and the hub configured to prevent the elongate tubular member from being separated from the structural members when the catheter assembly is in use.
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Accused Products
Abstract
Disclosed herein are heart pumps that include a catheter assembly and that can be applied percutaneously. Some embodiments include a locking device that prevents components of the catheter assembly from being separated when in use. The catheter assembly can include an expandable tip. In some embodiments, the catheter assembly includes a housing having a wall structure, a portion of which can have a bulbuous shape or can be deformable. In other embodiments, the housing can be configured to reduce fluttering or deflection of the housing and/or to maintain a gap between the housing and an impeller blade disposed therein.
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Citations
51 Claims
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1. A catheter assembly for a heart pump, comprising:
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an elongate tubular member; a hub coupled with a proximal end of the elongate tubular member; a plurality of structural members forming a distal portion of an impeller housing; a locking device disposed between the structural members and the hub configured to prevent the elongate tubular member from being separated from the structural members when the catheter assembly is in use. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A catheter assembly for a heart pump, comprising:
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an elongate tubular member; an expandable housing disposed at the distal end of the elongate tubular member, the expandable housing configured to house an impeller and to convey blood from an intake toward the impeller in use; an expandable tip coupled with the distal end of the expandable housing, the expandable tip having a collapsed configuration in which a tapered profile is provided for facilitating advancement through an anatomical structure and having an expanded configuration for spacing the intake from the anatomy adjacent to where the pump is operates. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A catheter assembly for a heart pump, comprising:
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an impeller shaft and an impeller blade extending from the impeller shaft; a housing in which the impeller shaft is journaled for rotation, the housing having an elongate wall structure disposed circumferentially about the impeller blade and extending distally and proximally thereof, a distal region of the wall structure being configured to isolate a proximal region of the wall structure from deflection due to application of loads by the heart during operation of the impeller assembly within the patient. - View Dependent Claims (22, 23, 24, 25)
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26. A percutaneous heart pump, comprising:
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a catheter assembly having a proximal end, a distal end, and an elongate body disposed therebetween, the elongate body configured such that the distal end can be disposed inside heart chamber of a human patient while a proximal end is disposed outside the patient, the distal end comprising an expandable housing being configured to be insertable into a peripheral vessel in a low profile configuration and to be expanded to a larger profile within the patient; an impeller shaft and an impeller blade extending from the impeller shaft, the impeller shaft is journaled for rotation in the distal portion of the catheter assembly; wherein the expandable housing comprising; an elongate wall structure disposed circumferentially about the impeller blade and extending distally and proximally thereof, the wall being configured to maintain a gap between the blade an inner surface of the wall structure within a selected range over a range of transverse loading corresponding to forces generated during systole and diastole of the heart. - View Dependent Claims (27, 28, 29, 30, 31)
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32. A catheter assembly for a heart pump, comprising:
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an impeller shaft and an impeller blade extending from the impeller shaft; an impeller housing in which the impeller shaft is journaled for rotation, the housing comprising; an inlet; an outlet; and an elongate wall structure disposed circumferentially about the impeller blade and extending distally and proximally thereof between the inlet and outlet, the wall structure adjacent to at least one of the inlet and the outlet being configured to maintain a bulbous shape when deployed. - View Dependent Claims (33, 34, 35, 36)
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37. A catheter assembly for a heart pump, comprising:
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an impeller shaft and an impeller blade extending from the impeller shaft; a housing in which the impeller shaft is journaled for rotation, the housing having an elongate wall structure disposed circumferentially about the impeller blade and extending distally and proximally thereof, the wall structure being sufficiently deformable to be displaced by ambient conditions during operation of the impeller assembly within a patient. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46)
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47. An impeller assembly for a heart pump, comprising:
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an impeller shaft and an impeller blade extending from the impeller shaft; and a housing in which the impeller shaft is journaled for rotation, the housing comprising an impeller blade zone, an inlet zone, and an outlet zone, the impeller blade zone being elongate and having a substantially constant transverse size at least from proximal of the impeller blade to distal of the impeller blade; wherein the impeller zone is disposed between the inlet zone and the outlet zone; and wherein at least one of the inlet zone and the outlet zone is configured to reduce fluttering of the housing when the heart pump is operating. - View Dependent Claims (48, 49)
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50. A catheter assembly for a heart pump, comprising:
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an impeller shaft and an impeller blade extending from the impeller shaft; a housing in which the impeller shaft is journaled for rotation, the housing having an elongate wall structure a portion of which is disposed circumferentially about the impeller blade and the impeller shaft, the wall structure being configured to provide a first stiffness over the impeller blade and a second stiffness greater than the first stiffness at a location proximal of the impeller blade to reduce bending of the housing proximal of the blade. - View Dependent Claims (51)
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Specification