Expandable impeller pump

• US 10,215,187 B2
• Filed: 02/13/2015
• Issued: 02/26/2019
• Est. Priority Date: 09/17/2004
• Status: Active Grant

• Current Assignee: TC1 LLC (Abbott Laboratories Incorporated), Penn State Research Foundation
• Original Assignee: TC1 LLC (Abbott Laboratories Incorporated), Penn State Research Foundation
• Inventors: McBride, Mark W., Mallison, Thomas M., Dillon, Gregory P., Campbell, Robert L., Boger, David A., Hambric, Stephen A., Kunz, Robert F., Runt, James P., Walsh, Justin M., Leschinsky, Boris
• Primary Examiner(s): Nguyen, Ninh H.
• Application Number:
  US14/622,339
• Publication Number:
  US 20150152878A1
• Time in Patent Office: 1,474 Days
• CPC Class Codes: A61M 60/135 inside a blood vessel, e.g. using grafting
• CPC Class Codes: A61M 60/148 in line with a blood vessel using resection or like techniques, e.g. permanent endovascular heart assist devices
• CPC Class Codes: A61M 60/205 Non-positive displacement blood pumps
• CPC Class Codes: A61M 60/237 the blood flow through the rotating member having mainly axial components, e.g. axial flow pumps
• CPC Class Codes: A61M 60/414 transmitted by a rotating cable, e.g. for blood pumps mounted on a catheter
• CPC Class Codes: A61M 60/808 specially adapted for deformable impellers, e.g. expandable impellers
• CPC Class Codes: B63B 2231/42 Elastomeric materials
• CPC Class Codes: B63H 1/26 Blades
• CPC Class Codes: B63H 11/08 of rotary type
• CPC Class Codes: F03G 7/0614 using shape memory elements
• CPC Class Codes: F04D 19/02 Multi-stage pumps
• CPC Class Codes: F04D 29/026 especially adapted for liquid pumps
• CPC Class Codes: F04D 29/181 Axial flow rotors F04D29/185 take precedence
• CPC Class Codes: F04D 29/247 elastic or self-adjusting
• CPC Class Codes: F04D 29/382 Flexible blades
• CPC Class Codes: F04D 29/526 Details of the casing section radially opposing blade tips ducts F04D29/545
• CPC Class Codes: F04D 29/528 especially adapted for liquid pumps
• CPC Class Codes: F04D 3/00 Axial-flow pumps priming or boosting F04D9/00
• CPC Class Codes: F04D 3/02 of screw type
• CPC Class Codes: F05D 2210/11 liquid, i.e. incompressible
• CPC Class Codes: F05D 2240/305 : related to the pressure side of a rotor blade
• CPC Class Codes: F05D 2240/306 : related to the suction side of a rotor blade
• CPC Class Codes: F05D 2250/51 : Inlet
• CPC Class Codes: F05D 2250/52 : Outlet
• CPC Class Codes: F05D 2300/43 : Synthetic polymers, e.g. plastics; Rubber
• CPC Class Codes: Y10S 415/90 : Rotary blood pump
• CPC Class Codes: Y10T 29/49229 : Prime mover or fluid pump making

Abstract

An impeller includes a hub, and a plurality of blades supported by the hub, the blades being arranged in at least two blade rows. The impeller has a deployed configuration in which the blades extend away from the hub, and a stored configuration in which at least one of the blades is radially compressed, for example by folding the blade towards the hub. The impeller may also have an operational configuration in which at least some of the blades are deformed from the deployed configuration upon rotation of the impeller when in the deployed configuration. The outer edge of one or more blades may have a winglet, and the base of the blades may have an associated indentation to facilitate folding of the blades.

Claims

1. A catheter pump comprising:

an expandable sleeve defining a fluid flow path and comprising a mesh and an elastic coating applied over the mesh, wherein the mesh includes voids disposed in a cylindrical body and the elastic coating covers the voids to form a fluid flow pipe, said fluid flow path disposed between inlets and outlets of the pump, the expandable sleeve configured to collapse from a deployed configuration to a stored configuration;

an impeller comprising a hub and a plurality of impeller blades supported thereby, the plurality of impeller blades arranged in at least two blade rows arranged axially along the hub to enable collapse of the plurality of impeller blades from the deployed configuration to the stored configuration, the impeller positioned within at least a portion of the expandable sleeve and configured to induce a fluid flow along the fluid flow path when in the deployed configuration, wherein each blade row of the at least two blade rows comprises a plurality of blades; and

a plurality of vanes disposed in the fluid flow path and configured to remove swirl velocity of the fluid flow when the expandable sleeve and the plurality of impeller blades are in the deployed configuration.

2. The catheter pump of claim 1, wherein the mesh substantially surrounds the impeller.

3. The catheter pump of claim 1, wherein the expandable sleeve encloses the fluid flow path.

4. The catheter pump of claim 1, wherein the impeller is expandable from a stored configuration to a deployed configuration.

5. The catheter pump of claim 1, wherein the mesh is arranged such that the expandable sleeve has a stored configuration and a deployed configuration, the expandable sleeve movable from the stored configuration to the deployed configuration and further movable from the deployed configuration to the stored configuration.

6. The catheter pump of claim 1, further comprising a storage sleeve, wherein the impeller and the expandable sleeve are configured to expand when urged out of the storage sleeve.

7. The catheter pump of claim 1, wherein the outlet is defined in a transition region between the expandable sleeve surrounding the impeller and a non-expandable elongate member, the non-expandable elongate member extending proximally from the transition region.

8. The catheter pump of claim 1, wherein the expandable sleeve defines a fluid pipe through which blood flows when the impeller is rotated.

9. The catheter pump of claim 1, further comprising an elongate body coupled with a proximal portion of the expandable sleeve, the elongate body configured to extend proximally from the expandable sleeve to outside a patient during operation of the catheter pump.

10. The catheter pump of claim 1, wherein the plurality of vanes comprise linear elements.

11. The catheter pump of claim 1, wherein the plurality of vanes are disposed about a central axis of the sleeve.

12. The catheter pump of claim 1, wherein the plurality of vanes comprise airfoil type cross-sections.

13. The catheter pump of claim 1, wherein a distal end of at least one of the plurality of blades includes a winglet.

14. A catheter pump comprising:

a cannula defining a fluid flow path and comprising an expandable sleeve, a transition region proximal of the expandable sleeve, and a non-expandable elongate member extending proximal from the transition region, the fluid flow path disposed between inlets and outlets of the cannula, the outlets defined in the transition region, the expandable sleeve comprising a mesh and configured to collapse from a deployed configuration to a stored configuration;

an impeller comprising a hub and a plurality of impeller blades supported thereby, the plurality of impeller blades arranged in at least two blade rows arranged axially along the hub to enable collapse of the plurality of impeller blades from the deployed configuration to the stored configuration, the impeller positioned within at least a portion of the expandable sleeve and configured to induce a fluid flow along the fluid flow path when in the deployed configuration; and

a plurality of vanes disposed in the fluid flow path and configured to remove swirl velocity of the fluid flow when the expandable sleeve and the plurality of impeller blades are in the deployed configuration.

15. The catheter pump of claim 14, wherein the impeller is expandable from a stored configuration to a deployed configuration.

16. The catheter pump of claim 14, wherein the mesh is arranged such that the expandable sleeve has a stored configuration and a deployed configuration, the expandable sleeve movable from the stored configuration to the deployed configuration and further movable from the deployed configuration to the stored configuration.

17. The catheter pump of claim 14, further comprising a storage sleeve, wherein the impeller and the expandable sleeve are configured to expand when the cannula is urged out of the storage sleeve.

18. The catheter pump of claim 14, wherein the plurality of vanes comprise linear elements.

19. The catheter pump of claim 14, wherein the plurality of vanes are disposed about a central axis of the expandable sleeve.

20. The catheter pump of claim 14, wherein the plurality of vanes comprise airfoil type cross-sections.