Anti-suction blood pump inlet
AssigneeABIOMED, Inc.
InventorsScott C. Corbett, Ahmad El Katerji, Charles DeLorenzo
Life of this patent
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Abstract
A heart pump assembly includes an impeller blade coupled to a rotor or a drive shaft, a cannula, a distal projection coupled to a distal end of the cannula and a blood inlet having a plurality of apertures. The plurality of apertures is radially oriented and disposed about a circumference of the cannula. The plurality of apertures includes at least a first ring of apertures which are proximal to the distal projection and a second ring of apertures which are proximal of the first ring of apertures. The plurality of apertures can allow the heart pump assembly to continue to function if anatomical structures or tissue become suctioned to a portion of the heart pump.
Claims15
A method of manufacturing a heart pump assembly, the method comprising:
- coupling an impeller blade to a rotor;
- inserting the impeller blade in a housing;
- coupling a cannula to the housing;
- coupling an inflow cage to the cannula, wherein the inflow cage comprises a plurality of apertures radially oriented about a constant circumference of the inflow cage, wherein the plurality of apertures is arranged in at least a first row of apertures spaced apart linearly about the constant circumference of the inflow cage and a second row of apertures spaced apart linearly about the constant circumference of the inflow cage, wherein the second row of apertures is proximal of the first row of apertures;
- and
- coupling a distal projection to a distal end of the inflow cage, wherein the distal projection is distal to the plurality of apertures and a base of the distal projection forms a distal edge of the first row of apertures,
- wherein the first row of apertures includes a plurality of first apertures and the second row of apertures includes a plurality of second apertures, each of the plurality of first apertures having an area greater than an area of each of the plurality of second apertures.
Dependencies are inferred from the claim text.