Heart pump controller
First Claim
1. A controller for a heart pump, the controller including a processing system that:
- a) detects movement of an impeller within a cavity in a first axial direction, the cavity including at least one inlet and at least one outlet, and the impeller including vanes for urging fluid from the inlet to the outlet;
b) causes a magnetic bearing to move the impeller in a second axial direction opposite the first axial direction, the magnetic bearing including at least one coil for controlling an axial position of the impeller within the cavity;
c) detects an indicator indicative of the power used by the magnetic bearing; and
,d) causes the magnetic bearing to control the axial position of the impeller in accordance with the indicator to thereby control a fluid flow between the inlet and the outlet.
1 Assignment
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Accused Products
Abstract
A controller for a heart pump, the controller including a processing system for determining movement of an impeller within a cavity in a first axial direction, the cavity including at least one inlet and at least one outlet, and the impeller including vanes for urging fluid from the inlet to the outlet, causing a magnetic bearing to move the impeller in a second axial direction opposite the first axial direction, the magnetic bearing including at least one coil for controlling an axial position of the impeller within the cavity, determining an indicator indicative of the power used by the magnetic bearing and causing the magnetic bearing to control the axial position of the impeller in accordance with the indicator to thereby control a fluid flow between the inlet and the outlet.
37 Citations
46 Claims
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1. A controller for a heart pump, the controller including a processing system that:
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a) detects movement of an impeller within a cavity in a first axial direction, the cavity including at least one inlet and at least one outlet, and the impeller including vanes for urging fluid from the inlet to the outlet; b) causes a magnetic bearing to move the impeller in a second axial direction opposite the first axial direction, the magnetic bearing including at least one coil for controlling an axial position of the impeller within the cavity; c) detects an indicator indicative of the power used by the magnetic bearing; and
,d) causes the magnetic bearing to control the axial position of the impeller in accordance with the indicator to thereby control a fluid flow between the inlet and the outlet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A heart pump including:
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a) a cavity including at least one inlet and at least one outlet; b) an impeller provided within the cavity, the impeller including vanes for urging fluid from the inlet to the outlet; c) a drive for rotating the impeller in the cavity; d) a magnetic bearing including at least one bearing coil for controlling an axial position of the impeller within the cavity; e) a controller that; i) detects movement of the impeller in a first axial direction; ii) causes the magnetic bearing to move the impeller in a second axial direction opposite the first axial direction; iii) detects an indicator indicative of the power used by the magnetic bearing; and
,iv) causes the magnetic bearing to control the axial position of the impeller in accordance with the indicator to thereby control a fluid flow between the inlet and the outlet. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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45. A method of controlling a heart pump, the method including, in a controller:
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a) detecting movement of an impeller within a cavity in a first axial direction, the cavity including at least one inlet and at least one outlet, and the impeller including vanes for urging fluid from the inlet to the outlet; b) causing a magnetic bearing to move the impeller in a second axial direction opposite the first axial direction, the magnetic bearing including at least one coil for controlling an axial position of the impeller within the cavity; c) detecting an indicator indicative of the power used by the magnetic bearing; and
,d) causing the magnetic bearing to control the axial position of the impeller in accordance with the indicator to thereby control a fluid flow between the inlet and the outlet.
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46. A controller for a heart pump, the controller including a processing system that:
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a) detects movement of an impeller from a balance position within a cavity, the cavity including at least one inlet and at least one outlet, and the impeller including vanes for urging fluid from the inlet to the outlet; b) causes a magnetic bearing to move the impeller to a new balance position based on a detected indication of power used by the magnetic bearing, the magnetic bearing including at least one coil for controlling an axial position of the impeller within the cavity, and the new balance position being used to control fluid flow from the inlet to the outlet.
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Specification