A stent with varying porosity is described. The stent can be comprised of multiple stents attached together. A braided stent may have selected regions of increased thickness. The stent may be comprised of wires that are welded together at their ends in order to minimize vessel trauma. The stent may comprise a helically wound radiopaque wire wound through the stent.

A stent with varying porosity is described. The stent can be comprised of multiple stents attached together. A braided stent may have selected regions of increased thickness. The stent may be comprised of wires that are welded together at their ends in order to minimize vessel trauma. The stent may comprise a helically wound radiopaque wire wound through the stent.

An embolic device includes a microcoil having a portion comprising one or more sets of loops. Loops of each of the one or more sets intersect one with another in succession in a cycle, collectively forming a three-dimensional shape. A shape-setting device includes a three-dimensional (3D) body having a curved surface and a plurality of winding members extending from the curved surface of the 3D body and arranged in a plurality of groups. Winding members of each of the plurality of groups are configured to allow a microcoil to wrap around to form a loop, and adjacent groups of winding members share a winding member to allow loops formed by the adjacent groups to intersect one with another. A method of making an embolic device is also provided.

An embolic device includes a microcoil having a portion comprising one or more sets of loops. Loops of each of the one or more sets intersect one with another in succession in a cycle, collectively forming a three-dimensional shape. A shape-setting device includes a three-dimensional (3D) body having a curved surface and a plurality of winding members extending from the curved surface of the 3D body and arranged in a plurality of groups. Winding members of each of the plurality of groups are configured to allow a microcoil to wrap around to form a loop, and adjacent groups of winding members share a winding member to allow loops formed by the adjacent groups to intersect one with another. A method of making an embolic device is also provided.

A vascular prosthesis (e.g., stent), and packaging and delivery system to selectively deliver a vascular prosthesis are described. In some embodiments, the vascular prosthesis utilizes a low porosity and high porosity section, and the packaging and delivery system allows the prosthesis to be delivered such that the position of the low porosity and high porosity sections of the prosthesis can vary.

A vascular prosthesis (e.g., stent), and packaging and delivery system to selectively deliver a vascular prosthesis are described. In some embodiments, the vascular prosthesis utilizes a low porosity and high porosity section, and the packaging and delivery system allows the prosthesis to be delivered such that the position of the low porosity and high porosity sections of the prosthesis can vary.

A branch vessel stent comprising a stent body and a first developing member, wherein the first developing member comprises a first developing portion and a second developing portion. A length of the first developing portion and a length of the second developing portion in an axial direction of the stent body are both not less than 0.5 mm. A distance between the intersections of the first developing portion and the second developing portion on a plane perpendicular to the axial direction of the stent body gradually increases from a position where the distance is the minimum distance to an end that is away from a first end of the first developing portion or the second developing portion. The minimum distance between the intersections of the first developing portion and the second developing portion on a plane perpendicular to the axial direction of the stent body is not more than 2 mm. The branch vessel stent is capable of accurately positioning the position thereof, and is capable of identifying a distortion and knotting of the stent for the branch vessel.

The invention relates to a medical device and a method of using it. The device is a stent which can be percutaneously deliverable with (or on) an endovascular catheter or via other surgical or other techniques and then expanded. The stent is configured to have a central portion defined by “open” cells and at least two end portions, defined by “closed” cells, spaced apart and directly connected to the distal and proximal ends of the central portion of the stent. The stent may also optionally have a covering or a lattice with openings.

The invention relates to a medical device and a method of using it. The device is a stent which can be percutaneously deliverable with (or on) an endovascular catheter or via other surgical or other techniques and then expanded. The stent is configured to have a central portion defined by “open” cells and at least two end portions, defined by “closed” cells, spaced apart and directly connected to the distal and proximal ends of the central portion of the stent. The stent may also optionally have a covering or a lattice with openings.

Various embodiments for an endovascular implantable device (and variations thereof) that virtually eliminates the problem of stent foreshortening phenomena in which the length of a stent or prosthesis shortens as the prosthesis is expanded in the biological vessel.