There is provided an expandable tube for deployment within a blood vessel, the expandable tube being reversibly switchable from a radially contracted and longitudinally expanded state to a radially expanded and longitudinally contracted state, the expandable tube comprising a first frame comprising braided filament, and a second frame connected to the first frame and overlapping with the first frame in the radial direction, the second frame comprising a network of non-overlapping elements, the non-overlapping elements being non-overlapping with respect to each other in the radial direction, wherein the network of non-overlapping elements has an interconnected structure comprising a plurality of sub-units that repeat in the longitudinal direction.

A blood conduit with stent has a flexible conduit body and an expandable stent structure. The conduit body has a first opening end through which only an inflow of a blood enters and a second opening end through which only an outflow of the blood leaves. The stent structure includes a plurality of threads adhered to the conduit body and expands in directions intersecting an axial direction of the conduit body. A boundary of one of the threads of the stent structure closest to the second opening end is away from the second opening end with a predetermined distance, thereby preventing blood back flow into the false lumen via a new tear.

Embodiments of the present invention provide medical devices and methods for treating a target site within the body. For example, one embodiment provides a stent graft for treating a target site proximate to a bifurcated lumen, wherein the stent graft includes a first tubular structure having proximal and distal ends and a side wall extending therebetween. The first tubular structure includes an opening defined within the side wall and is configured to define a first portion having first and second ends and a second portion having first and second ends. The opening corresponds to the first ends of the first and second portions and the second ends of the first and second portions respectively correspond to the proximal and distal ends of the first tubular structure, and at least a portion of the first and second portions are configured to be positioned within respective branches of a bifurcated lumen.

Embodiments of the present invention provide medical devices and methods for treating a target site within the body. For example, one embodiment provides a stent graft for treating a target site proximate to a bifurcated lumen, wherein the stent graft includes a first tubular structure having proximal and distal ends and a side wall extending therebetween. The first tubular structure includes an opening defined within the side wall and is configured to define a first portion having first and second ends and a second portion having first and second ends. The opening corresponds to the first ends of the first and second portions and the second ends of the first and second portions respectively correspond to the proximal and distal ends of the first tubular structure, and at least a portion of the first and second portions are configured to be positioned within respective branches of a bifurcated lumen.

A system for treating a bifurcated vessel that includes a first delivery catheter and a second delivery catheter. The first delivery catheter carries a proximal first stent and a distal second stent. The first delivery catheter also has a first elongate shaft, a proximal first expandable member with the proximal first stent disposed thereover, and a distal second expandable member with the distal second stent disposed thereover. The proximal first expandable member and distal second expandable member are independently expandable of one another. The second delivery catheter carries a third stent. The second delivery catheter also has a second elongate shaft, and a third expandable member with the third stent disposed thereover. The third expandable member is independently expandable of the proximal first expandable member and the distal second expandable member.

A system for treating a bifurcated vessel that includes a first delivery catheter and a second delivery catheter. The first delivery catheter carries a proximal first stent and a distal second stent. The first delivery catheter also has a first elongate shaft, a proximal first expandable member with the proximal first stent disposed thereover, and a distal second expandable member with the distal second stent disposed thereover. The proximal first expandable member and distal second expandable member are independently expandable of one another. The second delivery catheter carries a third stent. The second delivery catheter also has a second elongate shaft, and a third expandable member with the third stent disposed thereover. The third expandable member is independently expandable of the proximal first expandable member and the distal second expandable member.

An implantable medical device includes an elongate member having a cross-sectional dimension that is less than 0.00085 inch, wherein the elongate member is made from a material comprising a platinum-tungsten alloy having a percentage of tungsten that is at least 10% by weight or alternatively the implantable medical device includes an elongate member made from a material comprising an alloy containing rhenium.

A stent configured for implantation in a body lumen, includes: a tubular structure having a first end, a second end opposite from the first end, and a tubular body extending between the first end and the second end, the tubular body comprising a plurality of elongate portions defining a porosity for the stent, at least one of the elongate portions having a zig-zag configuration, the first end of the tubular structure having a plurality of crown elements disposed circumferentially with respect to a longitudinal axis of the tubular structure, the crown elements forming a crown configuration for the first end of the tubular body; and a plurality of tabs coupled to the first end of the tubular structure; wherein a number of the crown elements is higher than a number of the tabs; wherein the tabs are coupled to only a subset, and not all, of the crown elements.

A stent configured for implantation in a body lumen, includes: a tubular structure having a first end, a second end opposite from the first end, and a tubular body extending between the first end and the second end, the tubular body comprising a plurality of elongate portions defining a porosity for the stent, at least one of the elongate portions having a zig-zag configuration, the first end of the tubular structure having a plurality of crown elements disposed circumferentially with respect to a longitudinal axis of the tubular structure, the crown elements forming a crown configuration for the first end of the tubular body; and a plurality of tabs coupled to the first end of the tubular structure; wherein a number of the crown elements is higher than a number of the tabs; wherein the tabs are coupled to only a subset, and not all, of the crown elements.

The present invention relates to a stent graft for implantation in vessels of a patient, wherein the stent graft has a hollow cylindrical main body made of a first prosthesis material, with a proximal end and a distal end, with a longitudinal axis c and a circumference u, at least one pocket element which is made of a second prosthesis material and which is mounted circumferentially on the outer face and/or inner face of the main body in order to form a circumferential closed pocket on a longitudinal portion of the main body, and at least one stent element which extends in a meandering formation around the main body and is received inside the pocket element.