Inflow cannula and blood flow assist system
First Claim
1. A system for drawing blood from the heart of a patient, the system comprising:
- a blood pump including an inlet and an outlet;
an outflow cannula adapted to fluidly communicate the outlet of the blood pump to the circulatory system of the patient; and
a flexible cannula assembly adapted to extend through a heart wall having internal and external surfaces, the flexible cannula assembly further comprising;
a cannula body including a proximal end, a distal end including a first locking element, an inner wall defining a lumen, and an outer wall, the proximal end being coupled to the inlet of the blood pump;
a tip coupled with the distal end of the cannula body;
a first anchor including a first plurality of arms, the first anchor being coupled to the tip and adapted to engage the internal surface of the heart wall and operable to resist movement of the cannula assembly in at least one direction along a lengthwise direction of the cannula body; and
a second anchor including a second plurality of arms and a second locking element, the second anchor positioned on the outer wall of the cannula body, wherein the second locking element slidably engages the first locking element of the distal end of the cannula body to couple the second anchor to the external surface of the heart wall.
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Accused Products
Abstract
A system and method of drawing blood from the heart of a patient. The system includes a blood pump, an outflow cannula, and a flexible cannula assembly. The flexible cannula assembly includes a cannula body, a tip, and first and second anchors. The cannula body includes a proximal end coupled to the inlet of the blood pump, a distal end including a first locking element coupled to the tip. The first anchor has a first plurality of arms and is coupled to the tip and adapted to engage the internal surface of the heart wall. The second anchor includes a second plurality of arms and a second locking element and is slidably positioned on the outer wall of the cannula body and adapted to engage the first locking element of the distal end of the cannula body to couple the second anchor to the external surface of the heart wall.
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Citations
15 Claims
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1. A system for drawing blood from the heart of a patient, the system comprising:
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a blood pump including an inlet and an outlet; an outflow cannula adapted to fluidly communicate the outlet of the blood pump to the circulatory system of the patient; and a flexible cannula assembly adapted to extend through a heart wall having internal and external surfaces, the flexible cannula assembly further comprising; a cannula body including a proximal end, a distal end including a first locking element, an inner wall defining a lumen, and an outer wall, the proximal end being coupled to the inlet of the blood pump; a tip coupled with the distal end of the cannula body; a first anchor including a first plurality of arms, the first anchor being coupled to the tip and adapted to engage the internal surface of the heart wall and operable to resist movement of the cannula assembly in at least one direction along a lengthwise direction of the cannula body; and a second anchor including a second plurality of arms and a second locking element, the second anchor positioned on the outer wall of the cannula body, wherein the second locking element slidably engages the first locking element of the distal end of the cannula body to couple the second anchor to the external surface of the heart wall. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of securing a flexible cannula assembly to both internal and external surfaces of a heart wall of a patient, the flexible cannula assembly including a cannula body including a proximal end, a distal end having a first locking element, an inner wall defining a lumen, and an outer wall, and a tip coupled to the distal end of the cannula body, the method comprising:
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introducing the tip through the external and internal surfaces of the heart wall, such that the tip is in fluid communication with a first chamber of the heart; deploying a first anchor including a first plurality of arms, the first anchor being coupled to the tip to secure the flexible cannula assembly to the internal surface of the heart wall; moving a second anchor including a second plurality of arms and a second locking element distally towards the external surface of the heart wall; coupling the first locking element of the distal end of the cannula body to the second locking element of the second anchor to secure the flexible cannula assembly to the external surface of the heart wall; coupling a proximal end of the cannula body to an inlet of a blood pump; and operating the blood pump to draw blood from the first chamber of the heart through the tip and into the lumen of the cannula body. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification