Blood pump housing component

Patent metadata

Field	Value
Publication number	US-11364373-B2
Application number	US-202016937023-A
Country	US
Kind code	B2
Filing date	Jul 23, 2020
Priority date	May 13, 2014
Publication date	Jun 21, 2022
Grant date	Jun 21, 2022

Abstract

Blood pump assemblies and methods of manufacturing and operating blood pump assemblies are provided. The blood pump assembly includes a pump and an impeller blade rotatably coupled to the pump. The blood pump assembly also includes a pump housing component sized for passage through a body lumen and coupled to the pump. The pump housing component includes a peripheral wall extending about a rotation axis of the impeller blade. The peripheral wall includes an inner peripheral wall surface and an outer peripheral wall surface. The peripheral wall also includes one or more blood exhaust apertures. Each blood exhaust aperture in the one or more blood exhaust apertures is defined by an inner aperture edge and an outer aperture edge. Each inner aperture edge is chamfered between the inner peripheral wall surface and the outer peripheral wall surface.

First claim

The invention claimed is:

1. A blood pump assembly comprising:
a pump;
an impeller having one or more blades, the pump being configured to drive the impeller in rotation; and
a pump housing component sized for passage through a body lumen and coupled to the pump, the pump housing component including a peripheral wall extending about a rotation axis of the impeller, the peripheral wall having:
an inner surface,
an outer surface, and
a plurality of blood exhaust apertures, each blood exhaust aperture being defined by an inner edge and an outer edge between the inner surface and the outer surface; and
wherein the inner edge of each blood exhaust aperture has a rounded portion, and the outer edge of each blood exhaust aperture has a chamfered portion.

2. The blood pump assembly of claim 1 , wherein the one or more blood exhaust apertures are circular-shaped.

3. The blood pump assembly of claim 1 , wherein the outer edges of each blood exhaust apertures further includes a rounded portion.

4. The housing of claim 3 , wherein each rounded portion of the inner edge of each blood exhaust aperture has a radius of about 105 microns or greater.

5. The housing of claim 1 , wherein each rounded portion of the inner edge of each blood exhaust aperture has a radius of about 40 microns or greater.

6. The housing of claim 1 , wherein the entirety of the inner edge of each blood exhaust aperture is rounded.

7. The blood pump assembly of claim 1 , wherein the plurality of blood exhaust apertures comprises at least six blood exhaust apertures.

8. The blood pump assembly of claim 1 , wherein the impeller is positioned at least in part in the pump housing component.

9. The blood pump assembly of claim 1 , wherein the pump housing component is coupled to the pump at a first end and the pump housing component is coupled to a cannula component at a second end opposite the first end.

10. The blood pump assembly of claim 9 , wherein the cannula component includes a blood inlet manifold.

11. The blood pump assembly of claim 10 , further comprising a pigtail extension coupled to the blood inlet manifold.

12. The blood pump assembly of claim 1 , wherein the housing component is composed of a metal.

13. The blood pump assembly of claim 1 , wherein the pump housing component is electropolished.

14. The blood pump assembly of claim 1 , wherein for each blood exhaust aperture, the rounded portion of the inner edge transitions into a rounded portion of the outer edge, the rounded portion of the inner edge and the rounded portion of the outer edge having the same radius and center of curvature.

15. A blood pump assembly comprising:
a pump;
an impeller having one or more blades, the pump being configured to drive the impeller in rotation; and
a pump housing component sized for passage through a body lumen and coupled to the pump, the pump housing component including a peripheral wall extending about a rotation axis of the impeller, the peripheral wall having:
an inner surface,
an outer surface, and
a plurality of blood exhaust apertures positioned radially equidistant from a fixed longitudinal point along the rotation axis, each blood exhaust aperture being defined by an inner edge and an outer edge between the inner surface and the outer surface; and
wherein the inner edge of each blood exhaust aperture has a rounded portion, and the outer edge of each blood exhaust aperture has a chamfered portion.

Assignees

• Abiomed Inc

Inventors

• Corbett Scott C
• Qi Zhongwei
• Lee Kar

Classifications

• F04D3/005 Primary

  with a conventional single stage rotor · CPC title

• A61M60/237

  the blood flow through the rotating member having mainly axial components, e.g. axial flow pumps · CPC title

• A61M60/81

  Pump housings · CPC title

• A61M60/13

  by means of a catheter allowing explantation, e.g. catheter pumps temporarily introduced via the vascular system · CPC title

• A61M60/865

  Devices for guiding or inserting pumps or pumping devices into the patient's body · CPC title