DEVICES, METHODS AND SYSTEMS FOR ESTABLISHING SUPPLEMENTAL BLOOD FLOW IN THE CIRCULATORY SYSTEM
First Claim
1. A device for establishing a blood flow conduit between a chamber in a heart of a patient and a remote location, the device comprising:
- a cannula having an outer surface and proximal and distal end portions, the distal end portion including an opening communicating with a lumen of the cannula for allowing blood flow therethrough, the distal end portion and opening being configured for insertion into the chamber of the heart; and
first and second anchor elements having respective maximum width dimensions extending outwardly from the outer surface of the cannula, the first anchor element being positioned more distally than the second anchor element and defining a tissue receiving space therebetween, and the maximum width dimension of the first anchor element being larger than the maximum width dimension of the second anchor element, whereby the first anchor element is configured to be positioned inside the heart chamber and the second anchor element is configured to be positioned outside the heart chamber with heart tissue held in the tissue receiving space therebetween.
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Accused Products
Abstract
Devices, systems and methods for establishing a blood flow conduit between a chamber in a heart of a patient and a remote location. A blood inflow cannula having an outer surface and proximal and distal end portions. The distal end portion is configured for insertion into the chamber of the heart. First and second anchor elements have respective maximum width dimensions extending outwardly from the outer surface of the cannula. The first anchor element is positioned more distally than the second anchor element defining a tissue receiving space therebetween. The maximum width dimension of the first anchor element may be larger than the maximum width dimension of the second anchor element in use. The first anchor element is configured to be positioned inside the heart chamber and the second anchor element is configured to be positioned outside the heart chamber with heart tissue held in the tissue receiving space therebetween.
222 Citations
39 Claims
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1. A device for establishing a blood flow conduit between a chamber in a heart of a patient and a remote location, the device comprising:
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a cannula having an outer surface and proximal and distal end portions, the distal end portion including an opening communicating with a lumen of the cannula for allowing blood flow therethrough, the distal end portion and opening being configured for insertion into the chamber of the heart; and first and second anchor elements having respective maximum width dimensions extending outwardly from the outer surface of the cannula, the first anchor element being positioned more distally than the second anchor element and defining a tissue receiving space therebetween, and the maximum width dimension of the first anchor element being larger than the maximum width dimension of the second anchor element, whereby the first anchor element is configured to be positioned inside the heart chamber and the second anchor element is configured to be positioned outside the heart chamber with heart tissue held in the tissue receiving space therebetween. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A catheter system for establishing a blood flow conduit between a chamber in a heart of a patient and a remote location, the system comprising:
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a delivery catheter; a blood inflow catheter configured to be directed into the venous system of the patient via the delivery catheter, the blood inflow catheter having an outer surface and proximal and distal end portions, the distal end portion having an opening and being configured for insertion into the chamber of the heart and communicating with a lumen of the blood inflow catheter for allowing blood flow therethrough; and first and second anchor elements carried on the distal end portion and having respective maximum width dimensions extending outwardly from the outer surface of the blood inflow catheter, the first anchor element being positioned more distally than the second anchor element and defining a tissue receiving space therebetween, and the maximum width dimension of the first anchor element being larger than the maximum width dimension of the second anchor element, whereby the first anchor element is configured to be positioned inside the heart chamber and the second anchor element is configured to be positioned outside the heart chamber with heart tissue held in the tissue receiving space therebetween. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A supplemental blood flow assist device for increasing blood flow between a chamber in a heart of a patient and a remote location in the circulatory system of the patient, the device comprising:
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a blood pump having an inlet and an outlet, the outlet being adapted for connection to the remote location in the circulatory system of the patient; a cannula having an outer surface and proximal and distal end portions, the proximal end portion being configured for coupling to the inlet of the blood pump and the distal end portion having an opening and being configured for insertion into the chamber of the heart and communicating with a lumen of the cannula for allowing blood flow therethrough; and first and second anchor elements carried on the distal end portion and having respective maximum width dimensions extending outwardly from the outer surface of the cannula, the first anchor element being positioned more distally than the second anchor element and defining a tissue receiving space therebetween, and the maximum width dimension of the first anchor element being larger than the maximum width dimension of the second anchor element, whereby the first anchor element is configured to be positioned inside the heart chamber and the second anchor element is configured to be positioned outside the heart chamber with heart tissue held in the tissue receiving space therebetween. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22)
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23. A method of establishing blood flow from a chamber in a heart of a patient to a remote location for providing supplemental blood flow from the heart, the method comprising:
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inserting at least a portion of a distal end portion of a cannula into the chamber of the heart, the distal end portion including an opening and communicating with a lumen of the cannula for allowing blood flow therethrough and further including first and second anchor elements each having a maximum width dimension in a direction perpendicular to a lengthwise axis of the cannula, and the first anchor element having a larger maximum width dimension than the second anchor element; placing the first anchor element inside the chamber and against an inside surface of tissue defining the chamber; and placing the second anchor element outside the chamber and against an outside surface of the tissue defining the chamber. - View Dependent Claims (24, 25, 26, 27, 28)
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29. A method of establishing blood flow from a chamber in a heart of a patient to a remote location for providing supplemental blood flow from the heart, the method comprising:
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inserting a distal end portion of a cannula into the chamber of the heart, the distal end portion including an opening and communicating with a lumen of the cannula for allowing blood flow therethrough and further including first and second anchor elements with the first anchor element being located more distally than the second anchor element and a tissue receiving space being located between the first and second anchor elements; pulling the more proximally located second anchor element out of the chamber; engaging the more proximally located second anchor element against an outside surface of tissue defining the chamber; and engaging the first anchor element against an inside surface of the chamber such that the tissue is retained in the tissue receiving space and the cannula is in fluid communication with the chamber. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36)
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37. A cannula system for establishing blood flow between a chamber of a heart and remote location, comprising:
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a trocar; a cannula including a distal end with a lumen configured to receive the trocar therein; and an expandable element associated with the trocar and configured to temporarily engage the interior of the cannula during a process of inserting the distal end into the heart chamber. - View Dependent Claims (38)
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39. A method of establishing blood flow between a chamber of a heart and a remote location, comprising:
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temporarily expanding an expandable element associated with a trocar within a lumen of a cannula to engage the cannula; inserting a distal end of the cannula through heart tissue to establish fluid communication between the heart chamber and the cannula; and removing the trocar.
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Specification