Method and apparatus for recapture of hooked endoprosthesis
First Claim
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1. A vascular endoprosthesis comprising:
- a flexible tubular graft having proximal and distal ends;
an anchor assembly attached to the graft, the anchor assembly having a proximal end, a distal end and an axial length at least equal to that of the graft, at least the proximal end and distal end of the anchor assembly being resiliently expandable and connected to each other by at least two longitudinal struts that are oriented askew to the axis of the anchor assembly when the assembly is expanded.
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Abstract
An endoprosthesis assembly adapted to be securely positioned within a body lumen is provided with one or more hooks adapted to engage tissue that defines the body lumen. The endoprosthesis includes a resilient self-expanding anchor attached to the tubular graft. The anchor and hooks carried by the anchor are constructed to enable the endoprosthesis to be recaptured in a delivery device to enable repositioning or removal of the endoprosthesis and any time prior to complete deployment of the endoprosthesis in the patient.
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Citations
14 Claims
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1. A vascular endoprosthesis comprising:
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a flexible tubular graft having proximal and distal ends; an anchor assembly attached to the graft, the anchor assembly having a proximal end, a distal end and an axial length at least equal to that of the graft, at least the proximal end and distal end of the anchor assembly being resiliently expandable and connected to each other by at least two longitudinal struts that are oriented askew to the axis of the anchor assembly when the assembly is expanded. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A vascular endoprosthesis adapted to be delivered into and deployed in a blood vessel by a delivery device that includes a tubular sheath at its distal end, the endoprosthesis comprising:
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a tubular elongate graft having proximal and distal ends; a resiliently expandable anchor assembly having proximal and distal ends and a longitudinal axis, the anchor assembly being attached to the graft, the anchor assembly being radially expandable and contractible between an expanded position in which it supports the tubular graft in an open configuration and a radially contracted configuration in which the anchor assembly has a substantially reduced cross-sectional profile to enable the endoprosthesis to be radially contracted and contained within the delivery sheath; at least one hook attached to the anchor assembly and arranged to project radially outwardly, the hooks being mounted to the anchor assembly so that when the anchor assembly is in its expanded position, the hooks will be disposed radially outwardly of the graft and when the anchor is in a contracted configuration, the hooks can be disposed radially inward of and be contained within the delivery sheath; said at least one hook having a configuration comprising a bight portion that extends from the hook support and terminates in a sharp tip, the tip being defined by three facets formed at the end of the bight, including a middle facet and a pair of side facets, the middle and side facets merging together to define the sharp tip of the hook, the middle facet being oriented such that, when the anchor assembly is contained within the sheath, the middle facet will lie in a plane that is parallel to the longitudinal axis of the sheath. - View Dependent Claims (11)
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12. A vascular endoprosthesis comprising:
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a flexible tubular graft having proximal and distal ends; an anchor assembly attached to the graft, the anchor assembly having a proximal end, a distal end and an axial length at least equal to that of the graft, at least the proximal end and distal end of the anchor assembly being resiliently expandable and connected to each other by at least two longitudinal struts; the struts further comprising a core wire and a wire helically wound about the core wire. - View Dependent Claims (13, 14)
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Specification