Blood pump distal outflow cage
AssigneeABIOMED, Inc.
InventorMichael J. Bernazani
Life of this patent
Estimating the term…
Abstract
Blood pump assemblies with blood outflow cage components designed to reduce stress on a patient's vasculature, reduce hemolysis and damage to blood, and improve manufacturability. The blood pump assembly includes a blood outflow cage designed to expel the blood from a distal end of a blood pump assembly. The openings in the blood outflow cage have edges, corners, and junctions that are rounded, and smoothly transition into a diffuser at the proximal end of the blood outflow cage. The struts of the blood outflow cage may further taper down in thickness as they transition into a thinner cylindrical section at the proximal end of the blood outflow cage.
Claims20
A blood outflow cage for an intravascular blood pump assembly and sized for passage through a vascular lumen of a patient, comprising:
- a distal cap with a substantially conical, substantially curved-conical, or substantially dome-shaped outer surface;
- a diffuser having a substantially conical or substantially curved-conical outer surface, wherein the diffuser is disposed proximal to the distal cap;
- and
- a peripheral wall having:
- an inner surface;
- an outer surface;
- two or more blood exhaust openings, each blood exhaust opening being defined by two struts, wherein each strut has rounded inner and outer edges and rounded junctions with the diffuser, and wherein the proximal end of each blood exhaust opening has rounded corners;
- and
- a first cylindrical section that abuts the proximal end of each strut.
A blood pump assembly sized for passage through a vascular lumen of a patient, comprising:
- a pump;
- an impeller blade rotatably coupled to the pump;
- a blood inflow cage extending about a rotation axis of the impeller blade, and having at least two blood inlet openings;
- a cannula in fluid communication with the first housing, the proximal end of the cannula being coupled to the blood inflow cage;
- and
- a blood outflow cage coupled to the distal end of the cannula, including:
- a distal cap with a substantially conical, substantially curved-conical, or substantially dome-shaped outer surface;
- a diffuser having a substantially conical or substantially curved-conical outer surface, wherein the diffuser is disposed proximal to the distal cap;
- and
- a peripheral wall having:
- an inner surface;
- an outer surface;
- two or more blood exhaust openings, each blood exhaust opening being defined by two struts, wherein each strut has rounded inner and outer edges and rounded junctions with the diffuser, and wherein the proximal end of each blood exhaust opening has rounded corners;
- and
- a first cylindrical section that abuts the proximal end of each strut.
Dependencies are inferred from the claim text.