Centrifugal pumps for medical uses
AssigneeTerumo Cardiovascular Systems Corporation
InventorsTimothy John Canatella, Gregory Peter Muennich, Luke Powers
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Abstract
Extracorporeal circuit devices can be used for on-pump open-heart surgery to support surgical procedures such as coronary artery bypass grafting. In some cases, a centrifugal pump is used as part of an extracorporeal circuit. Centrifugal pump heads are described herein that induce flow on two sides of an impeller plate, and that can be conveniently mechanically assembled.
Claims19
A centrifugal pump for pumping blood in an extracorporeal circuit, the centrifugal pump comprising:
- a housing defining an inlet port, an outlet port, and an internal space;
- and
- an impeller disposed within the internal space, the impeller comprising a plurality of vanes extending from a plate member and one or more magnets coupled to the plate member,
- wherein the impeller comprises a first polymer and a second polymer encapsulating the first polymer, wherein the first polymer differs from the second polymer, and wherein the one or more magnets are encapsulated by the first polymer and the second polymer.
A method of manufacturing a composite impeller of a centrifugal pump for pumping blood in an extracorporeal circuit, the method comprising:
- molding an impeller skeleton component, the impeller skeleton component defining a plurality of pockets;
- placing a respective magnet in each pocket of the plurality of pockets;
- and
- molding a final impeller shape over the impeller skeleton component with the respective magnet placed in each pocket of the plurality of pockets.
Dependencies are inferred from the claim text.