Platinum-cobalt-boron blood pump element
AssigneeHeartWare, Inc.
InventorsJeffrey A. LaRose, Charles R. Shambaugh, Jr.
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Abstract
A magnetic impeller for a blood pump such as a magnetically driven, rotary ventricular assist device for pumping blood of a patient, the impeller comprising a magnetic alloy including platinum, cobalt, and boron.
Claims28
A rotatable impeller for assisting blood flow within a patient's vascular system, the impeller being magnetically driven and including a non-unitary body having an exterior layer and an interior portion opposite the exterior layer, the impeller being configured to be disposed within a housing including an outer diameter of between approximately 4.5 mm to 7.5 mm and having:
- at least one blade-like projection including:
- a first blood contacting surface comprising a biocompatible magnetic alloy including platinum, cobalt and boron, the first blood contacting surface forming a biocompatible surface area defining an entire magnetic and blood-contacting surface of the impeller.
A rotatable impeller configured to be disposed within a housing including an outer diameter of between approximately 4.5 mm to 7.5 mm for assisting blood flow within a patient's vascular system, the impeller comprising:
- a non-unitary body having an exterior layer and an interior portion opposite the exterior layer, the non-unitary body having at least one blade-like projection including:
- a first blood contacting surface formed entirely from a magnetic biocompatible alloy including platinum, cobalt and boron, and defining an entire magnetic and blood-contacting surface of the impeller, wherein the impeller is electromagnetically coupled to rotate within a ventricular assist device.
A rotatable impeller configured to be disposed within a housing including an outer diameter of between approximately 4.5 mm to 7.5 mm for assisting blood flow within a patient's vascular system, the impeller being magnetically driven and having:
- a non-unitary body comprising:
- a first portion formed entirely of a magnetic biocompatible alloy including platinum, cobalt, and boron, the first portion including a plurality of projections defining a plurality of longitudinal blood flow spaces therebetween;
- a blood contacting surface formed entirely by the first portion of the non-unitary body;
- and
- an interior portion surrounded entirely by the blood contacting surface.
Dependencies are inferred from the claim text.