A stent graft. The stent graft is provided in the axial direction thereof with at least one region T, and the region T includes a number of wavy rings; in the circumferential direction, the region T includes a region A and a region B that is connected to the region A, the ratio of the area of the region A to the area of the region T being -, the ratio of the coverage rate of the wavy rings in the region A to the coverage rate of the wavy rings in the region B being - 9/10, and the ratio of the coverage rate of the wavy rings within any circular region having a diameter of 20 mm within the region A to the coverage rate of the wavy rings in the region A being 0.7-1.3.

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 and a securely-installed artificial valve replacement device having the same, the stent being of a cylindrical structure; the top of the stent is provided with a fixed ear (60); the fixed ear (60) has a neck portion (601) connected to the top of the stent, and a head portion (602) engaged with the fixed head of the stent; the head portion (602) has a bending structure for improving the overall radial thickness; and the artificial valve replacement device is comprised of a stent and a prosthetic valve fixed on the stent. The stent with a bending structure overcomes the problem of easily disengaging from the fixed head of the stent, while not affecting the release of the stent.

A stent may include a stent body defining a longitudinal axis and proximal and distal ends. The stent body may be expandable from a compressed configuration to an expanded configuration. In some examples, the stent body may include a plurality of stent segments. The stent segments may include a first end segment and a second end segment on opposite ends of the stent body and at least one intermediate segment disposed between the first end segment and the second end segment. Each stent segment may define a plurality of cells. Each stent segment may define a plurality of peaks and valleys. The plurality of cells defined by the first end segment may alternate about the circumference of the stent between larger cells and smaller cells.

Apparatus and methods are provided for treating patients exhibiting symptoms of hypertension, isolated systolic hypertension, heart failure with preserved ejection fraction, May-Thuner Syndrome or dyspnea by diagnosing and reducing narrowing of a patient's iliac vein caused by extrinsic localized compression using a stent having circumferential differential radial stiffness and delivery catheter for aligning and deploying such stents.

An endoluminal prosthesis system for a branched body lumen comprises a branch vessel prosthesis. The branch vessel prosthesis is deployable within a branch vessel body lumen and comprises a stent having a generally tubular body portion, a flareable proximal end portion, and a coupling portion disposed intermediate the body portion and the flareable portion. The coupling portion is more crush-resistant than the body portion. The flareable proximal end may be disposed within a fenestrated stent graft with coupling portion disposed in the fenestration of the fenestrated stent graft.

A plastic covered stent for aortic dissection and an aortic dissection stent are disclosed. The plastic covered stent for aortic dissection includes a tubular membrane and multiple annular stents sequentially sutured on the membrane along an axial direction. Part of the annular stents on the membrane are semi-suture stents. Each semi-suture stent has non-suture zones separable from the membrane. When the plastic covered stent is bent, the membrane corresponding to the non-suture zones at an inner bending side of the plastic covered stent is separated from the semi-suture stents and folded inwardly. The semi-suture stents are distributed on a bending portion of the plastic covered stent for aortic dissection after being implanted.

A vascular stent, including a plurality of wave-shaped supporters connected in an axial direction. The tubular stent includes a proximal support mechanism, a middle support mechanism, and a differential support mechanism connected in sequence; the middle support mechanism and the distal support mechanism are respectively closed-loop structure; the proximal support mechanism includes a first support portion connected to the middle support mechanism and a second support portion provided at the proximal end of the first support portion; the first support portion is a closed-loop structure; the second support portion is an open-loop structure, and the end surface of the proximal end of the second support portion is an uneven structure to provide local support in the circumferential direction.

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.

An arterial anchor device and a venous anchor device operably coupled by graft material to form an anastomotic convector is provided. The arterial anchor device comprises a generally tubular main body including a distal end and a proximal end, the distal end defining a plurality of flanges integrally formed with the tubular main body and being movable from a first loaded position to a second expanded position. The venous anchor device includes a tubular main body having a metal frame structure and including a distal end and a proximal end, the distal end including a plurality of barbs thereon wherein said distal end has an outer diameter greater than the proximal end. The arterial anchor device and venous devices are fluidly connected by a graft to form an anastomotic connector.