HEART ASSIST DEVICE WITH EXPANDABLE IMPELLER PUMP
First Claim
1. An apparatus for inducing motion of a fluid relative to the apparatus, the apparatus comprising:
- an elongated cannula having a proximal portion and a distal portion, the proximal portion including a conduit having a fixed diameter, and the distal portion including an expandable cannula having a diameter expandable to a diameter greater than the fixed diameter; and
an impeller positioned in the elongated cannula and having a deployed configuration and a stored configuration, the impeller includinga hub; and
a blade supported by the hub, the blade having a proximal end attached to the hub and a distal end, the blade in the deployed configuration of the impeller extending away from the hub, and the blade in the stored configuration of the impeller being compressed so as to move the distal end of the blade towards the hub.
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Accused Products
Abstract
An impeller includes a hub and at least one blade supported by the hub. The impeller has a stored configuration in which the blade is compressed so that its distal end moves towards the hub, and a deployed configuration in which the blade extends away from the hub. The impeller may be part of a pump for pumping fluids, such as pumping blood within a patient. A blood pump may include a cannula having a proximal portion with a fixed diameter, and a distal portion with an expandable diameter. The impeller may reside in the expandable portion of the cannula. The cannula may have a compressed diameter which allows it to be inserted percutaneously into a patient. Once at a desired location, the expandable portion of the cannula may be expanded and the impeller expanded to the deployed configuration. A flexible drive shaft may extend through the cannula for rotationally driving the impeller within the patient'"'"'s body.
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Citations
30 Claims
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1. An apparatus for inducing motion of a fluid relative to the apparatus, the apparatus comprising:
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an elongated cannula having a proximal portion and a distal portion, the proximal portion including a conduit having a fixed diameter, and the distal portion including an expandable cannula having a diameter expandable to a diameter greater than the fixed diameter; and an impeller positioned in the elongated cannula and having a deployed configuration and a stored configuration, the impeller including a hub; and a blade supported by the hub, the blade having a proximal end attached to the hub and a distal end, the blade in the deployed configuration of the impeller extending away from the hub, and the blade in the stored configuration of the impeller being compressed so as to move the distal end of the blade towards the hub. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 25, 26, 27, 28)
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- 23. The apparatus as claimed in 21, wherein the first and second series of struts are connected to the reinforcing matrix.
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29. A pump for pumping fluid at a desired location, the pump comprising:
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a cannula having a compact state for insertion to the desired location and an expanded state; an impeller positioned in the cannula and having a hub and a plurality of blades supported by the hub, each blade having a proximal end attached to the hub and a distal end, the impeller having a stored configuration and a deployed configuration; and a drive mechanism for rotating the impeller in the deployed configuration, the blades in the stored configuration of the impeller being compressed so as to move the distal ends of the blades towards the hub, and the blades in the deployed configuration of the impeller extending away from the hub, the cannula being in the expanded state when the impeller is in the deployed configuration.
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30. A method of pumping blood within a subject, the method comprising:
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providing a blood pump including an expandable impeller and expandable cannula; inserting the blood pump into the subject in a stored configuration; positioning the blood pump so that the expandable impeller and expandable cannula are at a desired location; expanding the expandable cannula and expanding the expandable impeller within the expandable cannula; and rotating the expanded impeller so that the impeller pumps blood through the expanded cannula.
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Specification