Centrifugal pumps for medical uses
AssigneeTerumo Cardiovascular Systems Corporation
InventorsTimothy John Canatella, Gregory Peter Muennich, Luke Powers
Life of this patent
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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.
Claims20
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;
- a spindle including a first end that is fixed to the housing and a second end that is a free end;
- 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 defines a central hole that receives the free end of the spindle such that the impeller is freely rotatable around the spindle in relation to the housing.
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;
- a spindle including a first end that is fixed to the housing and a second end that is a free end;
- and
- an impeller disposed within the internal space, the impeller comprising:
- an upper annular ring plate defining a central opening;
- a plurality of magnet receptacle bosses extending from the upper annular ring plate;
- a plurality of magnets, wherein a respective magnet is coupled to each magnet receptacle boss of the plurality of magnet receptacle bosses;
- and
- a center hub disposed between the plurality of magnet receptacle bosses, the center hub defining a central hole that receives the free end of the spindle such that the impeller is freely rotatable around the spindle in relation to the housing.
A method of manufacturing a centrifugal blood pump, the method comprising:
- placing an impeller between a first pump housing portion and a second pump housing portion, the impeller comprising a plurality of vanes and one or more magnets;
- and
- latching the first pump housing portion together with the second pump housing portion, wherein the latching creates a liquid-tight seal between the first pump housing portion and the second pump housing portion.
Dependencies are inferred from the claim text.