Cardiac assist device
First Claim
1. An implantable cardiac assist device, comprising:
- an outer housing;
a pump unit within the housing, having an inlet and outlet connectable to a patient'"'"'s cardiovascular system and having a rotor portion therein rotatable to force blood entering the pump unit through the inlet out through the outlet;
a motor unit within the outer housing and hermetically sealed from the pump unit, the motor unit including control electronics and windings to produce a magnetic field couplable to the rotor portion, the motor unit being couplable to a power supply; and
shape memory valves disposed in the inlet and outlet, actuatable so as to permanently seal the inlet and outlet.
1 Assignment
0 Petitions
Accused Products
Abstract
In a cardiac assist device, a housing has an inlet and outlet connectable to a patient'"'"'s cardiovascular system. A pump is located within the housing to force blood that has entered through the inlet out through the outlet. The pump is connectable between the patient'"'"'s left atrium and the aorta so as to assist the function of the left ventricle. A motor unit is also disposed within the housing, hermetically sealed from the pump. The whole unit is wholly implantable in a patient'"'"'s chest. Permanently sealable valves, disposed in the inlet and outlet, may be closed without any invasive procedure to isolate the device from the heart once cardiac function assist is no longer required. The device may remain implanted within the patient indefinitely after the valves have been closed, and there is no requirement for a surgical procedure to remove the device once it is de-activated.
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Citations
16 Claims
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1. An implantable cardiac assist device, comprising:
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an outer housing; a pump unit within the housing, having an inlet and outlet connectable to a patient'"'"'s cardiovascular system and having a rotor portion therein rotatable to force blood entering the pump unit through the inlet out through the outlet; a motor unit within the outer housing and hermetically sealed from the pump unit, the motor unit including control electronics and windings to produce a magnetic field couplable to the rotor portion, the motor unit being couplable to a power supply; and shape memory valves disposed in the inlet and outlet, actuatable so as to permanently seal the inlet and outlet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An implantable cardiac assist device, comprising:
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an outer housing; a pump unit within the housing, having an inlet and outlet connectable to a patient'"'"'s cardiovascular system and having a rotor portion therein rotatable to force blood entering the pump unit through the inlet out through the outlet, the rotor portion including an impeller formed of a resiliently deformable material; and a motor unit within the outer housing and hermetically sealed from the pump unit, the motor unit including control electronics and windings to produce a magnetic field couplable to the rotor portion, the motor unit being couplable to a power supply. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. An implantable cardiac assist device, comprising:
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an outer housing; a pump unit within the housing, having an inlet and outlet connectable to a patient'"'"'s cardiovascular system and having a rotor portion therein rotatable to force blood entering the pump unit through the inlet out through the outlet; a motor unit within the outer housing and hermetically sealed from the pump unit, the motor unit including control electronics and windings to produce a magnetic field couplable to the rotor portion, the motor unit being couplable to a power supply; an inflow cannula, implantable in the left atrium attached to the inlet, and an outflow cannula, implantable in the aorta; and permanently sealable shape memory metal valves disposed in the inflow cannula and the outflow cannula.
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Specification