A method of braiding a stent includes braiding a number of elongate filaments around a mandrel using tensioned braiding carriers without spooling the filaments to the tensioned braiding carriers to form a braided stent having atraumatic ends.

A stent graft, including multiple wavy rings. The stent graft includes, in a circumferential direction, a region A and a region B connected to the region A. Each wavy ring includes a first wavy section located in the region A, and a second wavy section located in the region B. The wave included angle of the first wavy section is about 70°-120°; the ratio of the wave height of the first wavy section to the spacing between adjacent first wavy sections is 1/4-3; the wave included angle of the second wavy section is 30°-60°, the ratio of the wave height of the second wavy section to the spacing between adjacent second wavy sections is 1/4-3/2, and the ratio of the wave height of the first wavy section to the wave height of the second wavy section is greater than or equal to 1/3 and less than 1.

A stent design reduces the likelihood of contact among structural members when the stent diameter is reduced before insertion into the body. In one approach, an undulating link has a J-shaped profile or has an angled portion on one side at the peak of the link, in order to reduce contact during crimping. The stent may also include structural features that improve such aspects as flexibility, the coatibility of a drug coating onto the stent, flare reduction, stent retention within the body and/or reduction of the minimum diameter of the stent during crimping.

A stent comprises a framework that includes a sequence of cells that each occupy a discrete segment of the stent length, and each of the cells includes a plurality of struts with ends connected at respective vertices. In some forms the hollow cylindrical shape of the framework is moveable among a loading diameter that is smaller than a tube diameter, which is smaller than an expanded diameter, and every strut of the framework is oriented parallel to the stent axis when the hollow cylindrical shape is at the tube diameter. In other forms the framework includes T-bars that connect adjacent cells, where the T-bars have a column that has a minimum width perpendicular to the long axis that is wider than a maximum width of each of the struts, and the column defines at least one slot. In still other forms, the framework exhibits geometries that facilitate a high packing density for the framework when the stent is in a compressed tube or loading configuration.

A flow reducing implant for reducing blood flow in a blood vessel having a cross sectional dimension, the flow reducing implant comprising a hollow element adapted for placement in the blood vessel defining a flow passage therethrough, said flow passage comprising at least two sections, one with a larger diameter and one with a smaller diameter, wherein said smaller diameter is smaller than a cross section of the blood vessel. A plurality of tabs anchor, generally parallel to the blood vessel wall, are provided in some embodiments of the invention.

An angioplasty balloon including a non-deployable stent to prevent or reduce the potential for slippage of the inflated balloon with respect to the vessel wall being treated. The balloon includes a non-deployable stent that is adapted to be secured to the balloon or angioplasty balloon catheter. The stent has a proximal end, a distal end, and at least three radially-spaced struts, each, each strut connecting the proximal end to the distal end and having one or more bends that allow expansion of the strut to accommodate the inflation of the balloon. The stem is made or a material so that the stent collapses upon deflation of the balloon.

The present disclosure relates to an intravascular stent, preparation method and use thereof, and the intravascular stent comprises a positioning segment and a supporting segment, the positioning segment comprising a plurality of first repeating elements, the supporting segment comprising at least two supporting units and at least one connecting unit, the supporting unit comprising a plurality of second repeating elements, the number of the first repeating elements differing from the number of the second repeating elements, a plane formed by front ends of the plurality of first repeating elements being vertical to or intersecting with the axis of the intravascular stent. The intravascular stent of the present disclosure is particularly suitable for iliac vein, with good supporting effect for iliac vein and less damage to venous wall, and can effectively avoid forming in-stent secondary thrombosis after intravascular stent implantation. Moreover, the intravascular stent of the present disclosure can be well positioned in the iliac vein to improve the accuracy of the release, and it is simple for operation. The vascular stent of the present disclosure has the advantages of simple structure, convenient production and low cost, and thereby has important practical significance and good prospect in clinical application.

A method for implanting a prosthesis centrally within a curved lumen includes loading a prosthesis into a delivery sheath, advancing the sheath in a patient towards the curved lumen to place at least the proximal end of the prosthesis within the curved lumen, and centering the proximal end of the prosthesis and/or the distal end of the sheath within the curved lumen. In a first advancing step, the outer catheter containing the inner sheath is advanced together towards the curved lumen to a location proximal of the curved lumen and, in a second advancing step, the inner sheath containing the prosthesis is advanced into the curved lumen to place at least the proximal end within the curved lumen while the outer catheter substantially remains at the location. After centering, the proximal end of the prosthesis is deployed centered within the curved lumen.

A method of braiding a stent includes braiding a number of elongate filaments around a mandrel using tensioned braiding carriers without spooling the filaments to the tensioned braiding carriers to form a braided stent having atraumatic ends.

A stent graft includes a tubular member, a plurality of stent rings, and an uncovered section. The tubular member extends between a proximal end and a distal end. The plurality of stent rings extend in a ring shape while alternatingly bending toward the proximal end side and toward the distal end side. The plurality of stent rings include a plurality of fluctuating rings and a small fixed ring. The plurality of fluctuating rings have a first region in which the amplitude is a first value and a second region in which the amplitude is a second value smaller than the first value. The small fixed ring exhibits a maximum amplitude which is a third value which is smaller than the first value. The uncovered section extends while alternatingly bending toward a base end side and toward a tip end side.