Patent ID: 11938311
Assignee: ABIOMED, INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A heart pump assembly comprising:
a rotor;
a motor coupled to the rotor;
an impeller blade coupled to the rotor such that rotation of the rotor causes the impeller blade to rotate and pump blood;
a catheter; and
a cannula assembly comprising a cannula body and a blood inlet including a plurality of apertures radially oriented and disposed about a constant circumference exterior portion of the blood inlet,
wherein the impeller blade is inside the cannula assembly, and
wherein the plurality of apertures are open and configured to allow the blood to enter or exit and include at least a first row of apertures spaced apart linearly about the constant circumference exterior portion of the blood inlet and a second row of apertures spaced laterally from the first row of apertures on the constant circumference exterior portion of the blood inlet, wherein the second row of apertures are proximal of the first row of apertures such that the second row of apertures are closer to the catheter than the first row of apertures, and
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.