Clot retrieval device for removing clot from a blood vessel
First Claim
1. A clot removal device for removing a clot from a body vessel comprising an expandable structure and an elongate member,the elongate member having a proximal end and a distal end, the elongate member being connected to the expandable structure at its distal end,the expandable structure having a constrained delivery configuration, an expanded clot engaging deployed configuration, and an at least partially constrained clot pinching configuration, the expandable structure comprising:
- a main body portion comprising a plurality of rings of cells embedding in the clot and positioned between proximal and distal ends of the expandable structure, each ring comprising circumferential cells; and
a clot pinching structure configured to pinch the clot on movement from the deployed configuration to the clot pinching configuration, the clot pinching structure comprising;
a plurality of struts forming clot-receiving cells and extended between rings of the main body portion and comprising a diameter less than a diameter of the main body portion;
wherein the struts extend between crowns and are configured to pinch clot located in the cell as the device is moved from the expanded deployed configuration to the at least partially constrained clot pinching configuration, wherein the cell has a proximally facing crown and a distally facing crown and wherein the proximally facing crown has a diameter which is larger than a diameter of the distally facing crown; and
wherein portions between the cells of the rings are configured to deliver relatively low radial force to the vessel with minimized surface contact area between struts of the portions and the clot; and
wherein at least a portion of the expandable structure being configured to engage the clot in the expanded deployed configuration and to pinch the clot on movement from the deployed configuration to the clot pinching configuration.
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Accused Products
Abstract
A clot removal device for removing clot from a body vessel comprises an expandable structure and an elongate member. The expandable structure has a constrained delivery configuration, an expanded clot engaging deployed configuration, and an at least partially constrained clot pinching configuration. At least a portion of the expandable structure is configured to engage clot in the expanded deployed configuration and to pinch clot on movement from the deployed configuration to the clot capture configuration. The expandable structure may comprise a main body portion and a clot pinching structure and a diameter of the clot pinching structure is less than a diameter of the main body portion. The clot pinching structure may be substantially tubular and of spiral form.
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Citations
18 Claims
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1. A clot removal device for removing a clot from a body vessel comprising an expandable structure and an elongate member,
the elongate member having a proximal end and a distal end, the elongate member being connected to the expandable structure at its distal end, the expandable structure having a constrained delivery configuration, an expanded clot engaging deployed configuration, and an at least partially constrained clot pinching configuration, the expandable structure comprising: -
a main body portion comprising a plurality of rings of cells embedding in the clot and positioned between proximal and distal ends of the expandable structure, each ring comprising circumferential cells; and a clot pinching structure configured to pinch the clot on movement from the deployed configuration to the clot pinching configuration, the clot pinching structure comprising; a plurality of struts forming clot-receiving cells and extended between rings of the main body portion and comprising a diameter less than a diameter of the main body portion;
wherein the struts extend between crowns and are configured to pinch clot located in the cell as the device is moved from the expanded deployed configuration to the at least partially constrained clot pinching configuration, wherein the cell has a proximally facing crown and a distally facing crown and wherein the proximally facing crown has a diameter which is larger than a diameter of the distally facing crown; andwherein portions between the cells of the rings are configured to deliver relatively low radial force to the vessel with minimized surface contact area between struts of the portions and the clot; and
wherein at least a portion of the expandable structure being configured to engage the clot in the expanded deployed configuration and to pinch the clot on movement from the deployed configuration to the clot pinching configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification