Removable stent-graft
First Claim
1. An endoprosthesis comprising:
- a stent component having a small delivery profile and an enlarged deployed profile, said stent component having adjacent elements with space between adjacent elements; and
a graft material attached to the stent component covering the space between adjacent stent elements to form a continuous luminal surface;
wherein following deployment, the endoprosthesis is adapted to be cohesively disassembled to allow for its remote removal from a patient.
2 Assignments
0 Petitions
Accused Products
Abstract
A removable device such as a stent-graft, intended for applications where it may be desirable to remove the device at some time following implantation. The stent-graft of the present invention includes a helically-wound stent component provided with a covering of graft material. It is removable by gripping an end of the helically-wound stent component with a retrieval device and applying tension to the stent component in the direction in which it is intended to be withdrawn from the site of implantation. The use of such a retrieval device allows the stent-graft to be removed remotely, such as via a catheter inserted into the body at a different location from the implantation site. The design of the stent-graft is such that the stent component is extended axially while the adjacent portion of the graft separates between windings of the stent component. The axial extension of the stent component, with portions of the graft still joined to the stent component, allows the device to be “unraveled” (or “unwound”) and removed through a catheter of diameter adequately small to be inserted into the body cavity that contained the stent-graft. It is removed atraumatically, without incurring significant trauma to the body conduit in which it had been deployed.
131 Citations
34 Claims
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1. An endoprosthesis comprising:
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a stent component having a small delivery profile and an enlarged deployed profile, said stent component having adjacent elements with space between adjacent elements; and
a graft material attached to the stent component covering the space between adjacent stent elements to form a continuous luminal surface;
wherein following deployment, the endoprosthesis is adapted to be cohesively disassembled to allow for its remote removal from a patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. An endoprosthesis having a length comprising:
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a stent component;
a graft material attached to the stent component to form a continuous luminal surface;
wherein the endoprosthesis can be partially disassembled in situ to shorten the length of the endoprosthesis.
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27. An endoprosthesis comprising:
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a stent component having a small delivery profile and an enlarged deployed profile;
a graft material attached to the stent component to form a continuous luminal surface;
wherein following deployment, the stent component is adapted to be cohesively disassembled from the graft material to allow for the remote removal of at least a portion of the stent component from a patient. - View Dependent Claims (28)
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29. An endoprosthesis comprising:
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a stent component having a small delivery profile and an enlarged deployed profile;
said stent component comprising a wire formed into a generally helical winding having space between adjacent elements of the generally helical winding, wherein the generally helical winding provides a generally tubular form to the stent component and wherein the generally helical winding includes at least one apex;
a graft material attached to the stent component covering the space between adjacent elements of the generally helical winding, wherein the graft material provides a continuous luminal surface; and
wherein at least one of said apices is raised to protrude outwardly from said tubular form and wherein the resulting raised apex is covered by said graft material. - View Dependent Claims (30, 31, 32)
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33. An endoprosthesis comprising:
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a structural support having a small delivery profile and an enlarged deployed profile, said structural support having adjacent elements with space between adjacent elements; and
a graft material attached to the structural support covering the space between adjacent elements of the structural support to form a continuous luminal surface;
wherein following deployment, the endoprosthesis is adapted to be cohesively disassembled to allow for its remote removal from a patient.
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34. A method of making a removable stent-graft having a stent component and a covering of graft material, comprising:
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a.) providing a stent component having a helical orientation having a pitch;
b.) providing the stent component with a graft material that covers one side of the stent component and covers spaces between elements of the stent component, wherein the graft material is splittable in a direction parallel to the pitch of the helical orientation of the stent component.
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Specification