Impeller for catheter pump
AssigneeThoratec Corporation
InventorsZijing Zeng, Phyllis Yuen, Michael R. Butler
Life of this patent
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Abstract
An impeller for a pump is disclosed herein. The impeller can include a hub having a fixed end and a free end. The impeller can also have a plurality of blades supported by the hub. Each blade can have a fixed end coupled to the hub and a free end. The impeller can have a stored configuration and a deployed configuration, the blades in the deployed configuration extending away from the hub, and the blades in the stored configuration being compressed against the hub.
Claims29
A percutaneous heart pump system, the system comprising:
- an impeller disposed at a distal portion of the system, the impeller sized and shaped to be inserted through a vascular system of a patient,
- wherein the impeller is configured to pump blood through at least a portion of the vascular system at a flow rate of at least about 3.5 liters per minute when the impeller is rotated at a speed less than about 21,000 revolutions per minute.
A method of pumping blood through the vascular system of a patient, the method comprising:
- inserting an impeller through a portion of the vascular system of the patient to a heart chamber;
- and
- rotating the impeller at a speed less than about 21,000 revolutions per minute to pump blood through at least a portion of the vascular system at a flow rate of at least about 3.5 liters per minute.
An impeller configured for us in a catheter pump, the impeller comprising:
- a hub having a distal portion, a proximal portion, and a diameter;
- and
- a blade having a fixed end at the hub and a free end, the blade having a height defined by a maximum distance between the hub and the free end,
- wherein a value relating to a ratio of the blade height to the hub diameter is in a range of about 0.7 to about 1.45.
A percutaneous heart pump system, the system comprising:
- an impeller disposed at a distal portion of the system, the impeller sized and shaped to be inserted into a vascular system of a patient through a percutaneous access site having a size less than about 21 FR,
- wherein the impeller is configured to pump blood in the vascular system at a flow rate of at least about 3.5 liters per minute.
A percutaneous heart pump system, the system comprising:
- an impeller comprising one or more blades in a single row, the impeller disposed at a distal portion of the system, the impeller sized and shaped to be inserted through a vascular system of a patient,
- wherein the impeller is configured to pump blood through at least a portion of the vascular system at a flow rate of at least about 2.0 liters per minute when the impeller is rotated at a speed less than about 21,000 revolutions per minute.
Dependencies are inferred from the claim text.