Centrifugal blood pump apparatus
First Claim
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1. A centrifugal blood pump for pumping blood comprising:
- a pump enclosure including a stationary shroud, said shroud having an inlet disposed along a longitudinal axis, and a discharge outlet disposed traverse to said longitudinal axis;
a shaft extending along said longitudinal axis;
an electric motor driving said shaft, said pump enclosure including a motor housing adjacent to and integral with said stationary shroud, said motor being cooled with a fluid contained in a cooling loop in said motor housing, said cooling loop comprising a plurality of bores in a motor rotor disk of said motor, said motor rotor disk comprising a shaft and a hub, and said cooling loop comprising a plurality of bores in said shaft and said hub in said motor rotor disk;
a rotatable impeller having a hub connected to and coaxial with said shaft, said hub having an inlet portion proximate to said inlet said shaft operatively connected to said rotatable impeller, to drive said impeller and force blood from the inlet to the outlet of said pump;
a plurality of curved blades attached to said hub and extending radially outward from said hub, each of said blades having an end proximate to said inlet, said blade ends overlapping at said inlet portion of said hub to present an unbroken span of blade surface area, when viewed in the direction of said axis, and each of said blades having a leading edge adjacent said stationary shroud, facing toward said stationary shroud, and a distal edge opposite to and facing away from said leading edge; and
a disc extending radially from said longitudinal axis and connected to said distal edge of said blades, said disc having at least one fluid passageway to allow fluid communication through said disc.
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Abstract
A centrifugal impeller-type pump for transporting blood has a new and improved design in the impeller, to allow for the elimination of stagnant flow areas, and a geometrical design that minimizes damage to the blood components. A system for controlling and stabilizing the speed of centrifugal-type pumps used in a human cardiovascular system is also provided. Further provided are methods of corrosion protection and enhancing thromboresistance, rejection of waste heat, and methods to connect the artificial heart to the cardiovascular system as a Left Ventricle Assist Device (LVAD) and as a Total Artificial Heart (TAH).
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Citations
24 Claims
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1. A centrifugal blood pump for pumping blood comprising:
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a pump enclosure including a stationary shroud, said shroud having an inlet disposed along a longitudinal axis, and a discharge outlet disposed traverse to said longitudinal axis; a shaft extending along said longitudinal axis; an electric motor driving said shaft, said pump enclosure including a motor housing adjacent to and integral with said stationary shroud, said motor being cooled with a fluid contained in a cooling loop in said motor housing, said cooling loop comprising a plurality of bores in a motor rotor disk of said motor, said motor rotor disk comprising a shaft and a hub, and said cooling loop comprising a plurality of bores in said shaft and said hub in said motor rotor disk; a rotatable impeller having a hub connected to and coaxial with said shaft, said hub having an inlet portion proximate to said inlet said shaft operatively connected to said rotatable impeller, to drive said impeller and force blood from the inlet to the outlet of said pump; a plurality of curved blades attached to said hub and extending radially outward from said hub, each of said blades having an end proximate to said inlet, said blade ends overlapping at said inlet portion of said hub to present an unbroken span of blade surface area, when viewed in the direction of said axis, and each of said blades having a leading edge adjacent said stationary shroud, facing toward said stationary shroud, and a distal edge opposite to and facing away from said leading edge; and a disc extending radially from said longitudinal axis and connected to said distal edge of said blades, said disc having at least one fluid passageway to allow fluid communication through said disc. - 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)
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24. A centrifugal blood pump for pumping blood comprising:
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a pump enclosure including a stationary shroud, said shroud having an inlet disposed along a longitudinal axis, and a discharge outlet disposed traverse to said longitudinal axis; a shaft extending along said longitudinal axis; a rotatable impeller having a hub connected to and coaxial with said shaft, said hub having an inlet portion proximate to said inlet said shaft operatively connected to said rotatable impeller, to drive said impeller and force blood from the inlet to the outlet of said pump; a plurality of curved blades attached to said hub and extending radially outward from said hub, each of said blades having an end proximate to said inlet, said blade ends overlapping at said inlet portion of said hub to present an unbroken span of blade surface area, when viewed in the direction of said axis, and each of said blades having a leading edge adjacent said stationary shroud, facing toward said stationary shroud, and a distal edge opposite to and facing away from said leading edge; a disc extending radially from said longitudinal axis and connected to said distal edge of said blades, said disc having at least one fluid passageway to allow fluid communication through said disc; and a blood pressure transducer for automatic adjustment of the rotational speed responsive to blood pressure sensed by said blood pressure transducer.
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Specification