A medical device is disclosed and may have a spiral shape structure that can function as a stent, such as a flow diversion stent to treat aneurysms. The medical device may have a spiral shape structure that can function as an occlusive device, for instance to occlude aneurysms. The medical device may include a shape setting structure to selectively adjust the shape of the medical device.

A vascular implant, comprising a sheet comprising thin film nickel titanium (NiTi), wherein the sheet has at least one super-hydrophilic surface having a water contact angle of less than approximately 5 degrees. The sheet is configured to have a compacted form having a first internal diameter and a deployed form having a second internal diameter larger than the first internal diameter. The sheet may be delivered into a blood vessel in the compacted form and expanded to its deployed form at a treatment location within the blood vessel, wherein the stent is configured to expand onto an internal surface of the blood vessel and exert a radial force on said internal surface.

A device for placement in the aortic arch of a patient is provided. The device includes a distal portion for being engageably received in an aortic arch of a patient beyond the left subclavian artery and a stent portion fluidly engaged with the distal portion, the stent portion being permeable and configured to span a portion of the aortic arches to which the brachiocephalic trunk, left common carotid artery, and left subclavian artery attach to the aortic arch. A diameter of the stent portion may be modified by translation of the proximal portion to thereby alter a length of the stent portion thus causing modification of the diameter of the stent portion to fit anatomical features of differing dimensions.

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.

The invention generally relates to co-axial stent and catheter systems and medical procedures utilizing these systems. The co-axial stent system is characterized by two-coaxial stents, including an outer resorbable stent and an inner metal stent used to effect deployment of the resorbable stent. The stents may use for treatment of unstable plaque and/or thrombus at the carotid bifurcation and particularly those that are not causing any significant stenosis. The stents may also be used for treatment of cerebral aneurysms. The invention further describes related, equipment, uses and kits for the treatment of unstable plaque and/or thrombus and/or aneurysms.

An intravascular system having a first catheter having a first non-circular transverse cross-sectional configuration and a first delivery device configured for insertion into the lumen of the catheter. The first delivery device includes an implantable medical device and an elongated member supporting the first medical device such that the first elongated member and the first medical device are movable through the lumen of the first catheter. The first elongated member has a second non-circular transverse cross-sectional configuration corresponding to the first non-circular transverse cross-sectional configuration to thereby inhibit rotation of the first elongated member within the catheter and control orientation of the first medical device relative to the catheter.

A plaque tack can be used for holding plaque against blood vessel walls such as in treating atherosclerotic occlusive disease. The plaque tack can be formed as a thin, annular band for holding loose plaque under a spring or other expansion force against a blood vessel wall. Focal elevating elements and/or other features, such as anchors, can be used to exert a holding force on a plaque position while minimizing the amount of material surface area in contact with the plaque or blood vessel wall and reducing the potential of friction with the endoluminal surface. This approach offers clinicians the ability to perform a minimally invasive post-angioplasty treatment and produce a stent-like result without using a stent.

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.

The invention concerns a medical device, in particular a flow diverter, having a radially self-expandable lattice structure (10) which is tubular at least in some regions and which is composed of a plurality of interwoven individual wires (11) which form meshes (12) of the lattice structure (10), wherein at least some of the individual wires (11) have an X-ray visible core material (11a) and a superelastic mantle material (11b), wherein a plurality of directly adjacent meshes (12) in the circumferential direction of the lattice structure (10) form a mesh ring (13), wherein in a fully self-expanded state, the lattice structure (10) has an expansion diameter D.sub.exp, the mesh ring (13) has a mesh number n, and the core material (11a) has a core diameter d.sub.core, and wherein for the core diameter d.sub.core, the following holds:

d.sub.core=f.Math.(D.sub.exp/n)

wherein the following holds for a visibility factor f:

0.08≤f≤0.15

Embodiments are described for closing vascular access ports, such as arteriotomies, which involve placement and deployment of an expandable device configured to prevent blood flow across a subject arteriotomy while also keeping disturbance of intravascular flow to a minimum. Suitable prostheses may comprise one or more frames constructed from lengths of flexible materials, such as shape memory alloys or polymers. Such frames may be coupled to sheetlike or tube-like structures configured to spread loads, minimize thrombosis which may be related to intravascular flow, and maintain hemostasis.