Expandable impeller pump

• US 20090060743A1
• Filed: 06/09/2008
• Published: 03/05/2009
• Est. Priority Date: 09/17/2004
• Status: Active Grant

• Current Assignee: TC1 LLC (Abbott Laboratories Incorporated), Penn State Research Foundation, Thoratec LLC
• Original Assignee: Datascope Corporation (Getinge AB), Penn State Research Foundation
• Inventors: Hambric, Stephen A., Kunz, Robert F., Mallison, Thomas M., McBride, Mark W., Runt, James P., Boger, David A., Leschinsky, Boris, Campbell, Robert L., Walsh, Justin M., Dillon, Gregory P.
• Granted Patent: US 7,927,068 B2
• Time in Patent Office: Days
• US Class Current: 416/142
• 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. An apparatus for inducing motion of a fluid relative to the apparatus, the apparatus comprising:

an impeller, including;

a hub extending in a length direction; and

a plurality of blades supported by the hub, each blade having a proximal end attached to the hub and a distal end;

the blades being arranged in at least two blade rows arranged in series in the length direction of the hub;

the impeller having a deployed configuration and a stored configuration, each blade in the deployed configuration of the impeller extending away from the hub, and at least one of the blades in the stored configuration of the impeller being compressed so as to move the distal end of the at least one blade towards the hub.

2. The apparatus as claimed in claim 1, wherein each blade row includes at least two blades.

3. The apparatus as claimed in claim 1, wherein the distal end of at least one of the plurality of blades includes a winglet.

4. The apparatus as claimed in claim 1, wherein the distal end of each blade in at least one blade row includes a winglet.

5. The apparatus as claimed in claim 1, wherein the distal end of each of the plurality of blades includes a winglet.

6. The apparatus as claimed in claim 1, wherein the plurality of blades are formed integrally with the hub.

7. The apparatus as claimed in claim 1, wherein the impeller has a first radius in the deployed configuration and a radius in the stored configuration which is less than half the first radius.

8. The apparatus as claimed in claim 1, further comprising an expandable sleeve including a matrix and a film disposed around the matrix, at least part of the impeller being located within the sleeve.

9. The apparatus as claimed in claim 8, wherein the matrix is formed from a shape memory material.

10. The apparatus as claimed in claim 8, wherein the film includes an elastic polymer.

11. The apparatus as claimed in claim 8, wherein the expandable sleeve has a storage configuration and an expanded configuration, the sleeve in the storage configuration having a diameter less than about 4 mm.

12. The apparatus as claimed in claim 8, wherein the expandable sleeve has an inlet end and a discharge end, the sleeve including a plurality of vanes arranged at the discharge end.

13. The apparatus as claimed in claim 12, wherein each of the plurality of vanes has an airfoil-shaped cross-section.

14. An apparatus for inducing motion of a fluid relative to the apparatus, the apparatus comprising:

an impeller, including;

a hub extending in a length direction; and

a plurality of blades supported by the hub, each blade having a proximal end attached to the hub and a distal end;

the blades being arranged in at least two blade rows arranged in series in the length direction of the hub;

the impeller having a deployed configuration, a stored configuration, and an operational configuration, each blade in the deployed configuration of the impeller extending away from the hub, at least one of the blades in the stored configuration of the impeller being compressed so as to move the distal end of the at least one blade towards the hub, and at least some of the blades in the operational configuration being deformed from the deployed configuration upon rotation of the impeller when in the deployed configuration.

15. The apparatus as claimed in claim 14, wherein the impeller has a first radius in the deployed configuration and a second radius in the stored configuration which is less than half the first radius.

16. The apparatus as claimed in claim 15, wherein the impeller has a third radius in the operational configuration, the second radius being less than half the third radius.

17. The apparatus as claimed in claim 14, wherein the impeller in the operational configuration is operable to pump about 4 liters of fluid per minute.