Stent and Stent Retrieval System and a Method of Pulling a Stent Into a Tubular Member
First Claim
1. Stent and stent retrieval system, said retrieval system comprising a tubular member with a lumen terminating in a distal end opening, and a retrieval member with a least one engagement means, the tubular member and the retrieval member being mutually axially displaceable while the retrieval member extends in said lumen of the tubular member, said stent comprising at least one engagement member to which said at least one engagement means can engage and a tubular body of a plurality of annular rows of cells that are interconnected and located one after the other in the axial direction of the tubular body, the cells in one annular row of cells being interconnected with the subsequent row of similarly oriented cells at areas of interconnection which in said subsequent annular row of cells are circumferentially offset with respect to the connections between the cells in said subsequent annular row of cells, wherein the end row of cells is an annular row of cells comprising first cell sides forming at least one circumferentially closed loop in which the individual cell has an attachment point, wherein said at least one engagement member comprises at least three tie members that are mutually connected at a junction and extend individually from the junction to the attachment point of an associated cell, and wherein the attachment points in the annular end row of cells are circumferentially offset with respect to the connections or areas of interconnection at the end of the tubular body between the cells in said end row.
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Accused Products
Abstract
A stent has an engagement member (9). A stent retrieval system has a tubular member (13) and a retrieval member (14) with an engagement means (15). The engagement member is attached to an end row of cells of the tubular stent body (1). The cells in one annular row of cells are interconnected with the subsequent row of similarly oriented cells (2a) at areas of interconnection (7) which in the subsequent annular row of cells are circumferentially offset with respect to the connections (8) between the cells in said subsequent annular row of cells.
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Citations
19 Claims
- 1. Stent and stent retrieval system, said retrieval system comprising a tubular member with a lumen terminating in a distal end opening, and a retrieval member with a least one engagement means, the tubular member and the retrieval member being mutually axially displaceable while the retrieval member extends in said lumen of the tubular member, said stent comprising at least one engagement member to which said at least one engagement means can engage and a tubular body of a plurality of annular rows of cells that are interconnected and located one after the other in the axial direction of the tubular body, the cells in one annular row of cells being interconnected with the subsequent row of similarly oriented cells at areas of interconnection which in said subsequent annular row of cells are circumferentially offset with respect to the connections between the cells in said subsequent annular row of cells, wherein the end row of cells is an annular row of cells comprising first cell sides forming at least one circumferentially closed loop in which the individual cell has an attachment point, wherein said at least one engagement member comprises at least three tie members that are mutually connected at a junction and extend individually from the junction to the attachment point of an associated cell, and wherein the attachment points in the annular end row of cells are circumferentially offset with respect to the connections or areas of interconnection at the end of the tubular body between the cells in said end row.
- 18. A method of pulling a stent into a tubular member, the stent comprising at least one engagement member and a tubular body having a plurality of annular rows of cells that re interconnected and located one after the other in the axial direction of the tubular body, where at least one engagement means grips the at least one engagement member and pulls it through a distal end opening of the tubular member and into an inner lumen of said tubular member, said annular rows of cells having an initial diameter which is larger than the diameter of said inner lumen, further comprising pulling said at least one engagement member into and along the lumen of the tubular member and pushing the tubular member towards the tubular body, whereby the annular rows of cells maintain their initial diameter at least until they are within one row from said end opening.
Specification