A flow modifying apparatus may include a plurality of struts coupled together to form a radially expandable frame having a proximal end and a distal end. The proximal and distal ends may be radially expandable into expanded proximal and distal ends. A reduced diameter portion of the expandable frame may be disposed between the expanded proximal and distal ends and the reduced diameter portion may comprise a fluid flow through passage. A cover may be disposed over at least a portion of the radially expandable frame. The reduced diameter portion modifies fluid flow therethrough immediately upon implantation thereof and forms a pressure gradient between the inflow end and the reduced diameter portion.

A stent for vascular interventions having a hybrid open cell geometry. Variants of the stent include bare metal stents and drug-eluting stents. Embodiments of the stent include end projections for radiopaque markers or a discontinuous partial radiopaque coating on low-stress or low-strain regions of the peripheral stent. The stents of the invention are characterized by having thin walls, nested rows of struts, high expansion ratio, high and uniform radial force over entire diametric size and length of device, crush resistance up to and including about 90% of its fully expanded diameter, high fatigue resistance and high corrosion resistance.

Various stents and stent-graft systems for treatment of medical conditions are disclosed. In one embodiment, an exemplary stent-graft system may be used for endovascular treatment of a thoracic aortic aneurysm. The stent-graft system may comprise proximal and distal components, each comprising a graft having proximal and distal ends, where upon deployment the proximal and distal components at least partially overlap with one another to provide a fluid passageway therebetween. The proximal component may comprise a proximal stent having a plurality of proximal and distal apices connected by a plurality of generally straight portions, where a radius of curvature of at least one of the proximal apices may be greater than the radius of curvature of at least one of the distal apices. The distal component may comprise a proximal z-stent coupled to the graft, where the proximal end of the graft comprises at least scallop formed therein that generally follows the shape of the proximal z-stent. Further, the distal component may comprise at least one z-stent stent coupled to the distal end of the graft and extending distally therefrom that reduces proximal migration of the distal component.

An expandable stent for implantation in a body lumen, such as an artery, is disclosed. The stent consists of a plurality of radially expandable cylindrical rings generally aligned on a common longitudinal stent axis and interconnected by one or more interconnecting links placed so that the stent is flexible in the longitudinal direction. The link pattern is optimized to enhance longitudinal flexibility and high longitudinal strength compression of the stent.

Devices that can be delivered into a vascular system to divert flow are disclose herein. According to some embodiments, devices are provided for treating aneurysms by diverting flow. An expandable device can comprise, for example, first a plurality of strut regions and a plurality of bridge regions. Each of the bridge regions may connect a first strut of a first strut region to a second strut of a second strut region. The first strut region may comprise a first plurality of apices defining a first circumferential plane, and the second strut region may comprise a second plurality of apices defining a second circumferential plane. A first curved segment of the bridge may extend across the first circumferential plane towards the first strut region, and a second curved segment of the bridge may extend across the second circumferential plane towards the second strut region.

The invention relates to a double stent comprising coaxially arranged stents, wherein a first membrane (4) being arranged between a first inner stent (2) and at least two outer stents (3), and a second membrane (5) being arranged on the outer stents (3), with the membrane ends of the first (4) and second membrane (5) being brought together at the ends of the stents (2, 3) and folded around to the inside of the first stent (2) and clamped securely under flexible tongues (6) of the first stent (2).

A stent that has a reduced state, an expanded state, and a delivery state, includes helical windings, a bridge, and a sacrificial bridge. The helical windings define a cylinder with a helical axis including a strut having a straight portion connected to a curved portion, wherein the straight portion aligns with the helical axis. The bridge connects adjacent windings. The sacrificial bridge connects adjacent windings and is configured for removal in the expanded state.

A stent having a line-shaped body that extends helically in a circumferential direction while reciprocating in an axial direction by continuously alternating straight parts and curved parts, wherein the plurality of straight parts in the line-shaped body have a substantially constant thickness throughout the entire stent, and a certain number of the plurality of curved parts in the line-shaped body have different thicknesses.

A tubular prosthesis having at least two helical loops or discrete loops, linked by a bridge, includes at least two regular struts connected by a regular inflection point forming a regular gap between the regular struts and at least two stagger struts connected by a stagger inflection point forming a stagger gap wherein the regular gap has a size different from the stagger gap.

This disclosure relates to a stent for use in vascular interventions, the stent comprising a first portion for placing in a first lumen and a second portion for placing in a region of a branch point at which the first lumen branches off a second lumen, the second portion comprising one or more rings linked by second links to the first portion and, if the second portion comprises two or more rings, together. The first and second portions are configured to be different to facilitate controlled longitudinal deformation of the second portion.