Disclosed are various embodiments of a stent having a variety of pattern variations defined by a polynomial function, such as a 4.sup.th order polynomial. For example, the pattern variation can include bridges and/or struts forming the stent that have different lengths along a length of the stent. The pattern variations can assist with achieving desired and variable flexibility and conformity to vasculature along the stent.

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.

Described herein are flexible implantable occluding devices that can, for example, navigate the tortuous vessels of the neurovasculature. The occluding devices can also conform to the shape of the tortuous vessels of the vasculature. In some embodiments, the occluding devices can direct blood flow within a vessel away from an aneurysm or limit blood flow to the aneurysm. Some embodiments describe methods and apparatus for adjusting, along a length of the device, the porosity of the occluding device. In some embodiments, the occluding devices allows adequate blood flow to be provided to adjacent structures such that those structures, whether they are branch vessels or oxygen-demanding tissues, are not deprived of the necessary blood flow.

This invention is a system for the treatment of body passageways; in particular, vessels with vascular disease. The system includes an endovascular graft with a low-profile delivery configuration and a deployed configuration in which it conforms to the morphology of the vessel or body passageway to be treated as well as various connector members and stents. The graft is made from an inflatable graft body section and may be bifurcated. One or more inflatable cuffs may be disposed at either end of the graft body section. At least one inflatable channel is disposed between and in fluid communication with the inflatable cuffs.

A stent (scaffold) or other luminal prosthesis comprising circumferential structural elements which provides high strength after deployment and allows for scaffold to uncage, and/or allow for scaffold or luminal expansion thereafter. The circumferential scaffold may be formed from degradable material, or may be formed from non-degradable material and will be modified to expand and/or uncage after deployment.

An intravascular stent is provided to be implanted in coronary arteries and other body lumens. The transverse cross-section of at least some of the stent struts have a ratio of polar and bending moments of inertia, which results in optimal resistance to stent twisting. This resistance to twisting ratio for the stent struts minimizes out of plane twisting of the struts or projecting edges of the struts when the stent is expanded from a compressed diameter to an expanded diameter in a coronary artery.

A stent Includes a stent body formed by a strut. The stent body is cylindrically-shaped and extends in an axial direction. The stent body includes a plurality of helical portions and an annular portion. The strut is helically-shaped along the axial direction to form the plurality of helical portions and the strut is annularly-shaped in the circumferential direction to form the annular portion. Each of the plurality of helical portions has a distal end point and a proximal end point. The plurality of helical portions include a first helical portion and a second helical portion adjacent to the first helical portion in the axial direction. The annular portion is disposed between the first and second helical portions in the axial direction. At least one of the distal and proximal end points of the plurality of helical portions is directly connected to the annular portion.

A bioabsorbable composite stent structure, comprising bioabsorbable polymeric ring structures which retain a molecular weight and mechanical strength of a starting substrate and one or more interconnecting struts which extend between and couple adjacent ring structures. The ring structures can have a formed first diameter and being radially compressible to a smaller second diameter and re-expandable to the first diameter. The ring structures can comprise a base polymeric layer. The interconnecting struts can be formed from a polymer blend or co-polymer of poly-L-lactide (PLLA) and an elastomeric polymer. The interconnecting struts each can have a width that is less than a circumference of one of the ring structures. The adjacent ring structures can be axially and rotationally movable relative to one another via the interconnecting struts. The interconnecting struts can also be bioabsorbable.

A prosthesis is disclosed for placement at an Os opening from a main body lumen to a branch body lumen. The prosthesis includes a radially expansible support at one end, a circumferentially extending link at the other end and at least one frond extending axially therebetween. The support is configured to be deployed in the branch body lumen, with the circumferentially extending link in the main lumen and the frond extendable across the Os.

Devices that can be delivered into a vascular system to divert flow are disclosed herein. According to some embodiments, devices are provided for treating aneurysms by diverting flow. An expandable device can comprise, for example, a plurality of connector sections and a plurality of bridge sections. Each of the connector sections may extend circumferentially about the expandable device and include a plurality of connector struts. Each of the plurality of bridge sections may be attached to and extend between two of the connector sections and comprise a plurality of parallel, non-branching, helical bridge members.