AXIAL FLOW BLOOD PUMP WITH RADIALLY OFFSET ROTOR
First Claim
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1. A blood pump, comprising:
- a housing defining a proximal end, a distal end, and a first axis extending from the proximal end to the distal end;
a ferromagnetic rotor disposed within the housing and configured pump blood in a direction along the first axis; and
a stator disposed within housing and around the ferromagnetic rotor, the stator being configured to apply a magnetic force causing rotation of the ferromagnetic rotor, the stator being eccentric to the rotor.
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Abstract
A blood pump including a housing defining a proximal end, a distal end, and a first axis extending from the proximal end to the distal end. A ferromagnetic rotor is disposed within the housing and configured pump blood in a direction along the first axis. A stator is disposed within housing and around the ferromagnetic rotor, the stator is configured to apply a magnetic force causing rotation of the ferromagnetic rotor, the stator being eccentric to the rotor.
12 Citations
20 Claims
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1. A blood pump, comprising:
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a housing defining a proximal end, a distal end, and a first axis extending from the proximal end to the distal end; a ferromagnetic rotor disposed within the housing and configured pump blood in a direction along the first axis; and a stator disposed within housing and around the ferromagnetic rotor, the stator being configured to apply a magnetic force causing rotation of the ferromagnetic rotor, the stator being eccentric to the rotor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A blood pump, comprising:
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a housing having an inflow cannula sized to be implanted with a human heart, the inflow cannula defining a proximal end, a distal end, and a first axis extending from the proximal end to the distal end; a ferromagnetic impeller disposed within the housing proximate to the proximal end of the inflow cannula, the impeller defining a second axis and configured impel blood in a direction along the second axis; and a stator disposed within housing and around the ferromagnetic impeller, the stator being configured to apply a magnetic force causing rotation of the ferromagnetic impeller around the second axis, the stator defining a third axis offset from the second axis and offset from the first axis; and a non-ferromagnetic tubular body disposed within the housing and around the impeller, the tubular body being co-axial within the first axis. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A blood pump, comprising:
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a housing having an inflow cannula sized to be implanted with a human heart, the inflow cannula defining a proximal end, a distal end, and a first axis extending from the proximal end to the distal end; a ferromagnetic impeller defining a plurality of hydrodynamic bearings disposed within the housing proximate to the proximal end of the inflow cannula, the impeller defining a second axis parallel to the first axis and configured impel blood in a direction along the second axis; a stator disposed within housing and around the ferromagnetic rotor, the stator being configured to apply a magnetic force causing rotation of the ferromagnetic impeller around the second axis, the stator defining a third axis parallel to the second axis; and a non-ferromagnetic tubular body disposed within the housing and around the impeller, the tubular body being co-axial within the first axis, the tubular body being eccentric with the impeller and creating a fluid gap between the impeller and the tubular body, the fluid gap being non-uniform around the impeller.
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Specification