The present invention provides systems and methods for deploying implantable devices within the body. The delivery and deployment systems include at least one catheter or an assembly of catheters for selectively positioning the lumens of the implant to within target vessels. Various deployment and attachment mechanisms are provided for selectively deploying the implants.

The present invention provides systems and methods for deploying implantable devices within the body. The delivery and deployment systems include at least one catheter or an assembly of catheters for selectively positioning the lumens of the implant to within target vessels. Various deployment and attachment mechanisms are provided for selectively deploying the implants.

A vascular stent (100) comprises a plurality of wave loops. In its natural state, in two of the wave loops which are adjacent in a group, a part of a wave crest of a lower layer wave loop are in a restrained connection with a part of a wave trough of an upper layer wave loop; the other part of the wave crest of the lower layer wave loop passes through the other part of the wave trough of the upper layer wave loop, and the other part of the wave crest and the other part of the wave trough are in a non-contact mutually-suspended connection. Some of the wave crests and wave troughs of the vascular stent (100) are in the non-contact mutually-suspended connection rather than the restrained connection, so that the maximum flexibility is provided to the stent, and meanwhile, the overall stability of the stent is guaranteed. The stent (100) can maintain a good shape during both implantation and the release process, so that safety during release is ensured.

A vascular stent (100) comprises a plurality of wave loops. In its natural state, in two of the wave loops which are adjacent in a group, a part of a wave crest of a lower layer wave loop are in a restrained connection with a part of a wave trough of an upper layer wave loop; the other part of the wave crest of the lower layer wave loop passes through the other part of the wave trough of the upper layer wave loop, and the other part of the wave crest and the other part of the wave trough are in a non-contact mutually-suspended connection. Some of the wave crests and wave troughs of the vascular stent (100) are in the non-contact mutually-suspended connection rather than the restrained connection, so that the maximum flexibility is provided to the stent, and meanwhile, the overall stability of the stent is guaranteed. The stent (100) can maintain a good shape during both implantation and the release process, so that safety during release is ensured.

A method of connecting an expansion ring to at least one end of a braided implant, the method including positioning the braided implant about a tube; everting an end portion of the braided implant over a first end of the tube; assembling an expansion ring to the braided implant, the expansion ring being a multi-leaved expansion ring comprising clips terminating with an open-ended coupling opening, wherein the openings are pushed over a set of intersecting wires of the braided implant at respective circumferential locations on or adjacent the first end of the tube; closing the openings over the set of intersecting wire; trimming ends of the braided implant; and reversing eversion of the braided implant thereby positioning the expansion ring internal to the braided implant.

An implantable device includes a tubular member defining a longitudinal axis and a lumen. The tubular member includes plurality of filaments defining a plurality of openings therebetween; a distal end portion having a distal diameter; a proximal end portion having a proximal diameter that is larger than the distal diameter; and an intermediate portion having an intermediate diameter that is smaller than the distal diameter.

An implantable device includes a tubular member defining a longitudinal axis and a lumen. The tubular member includes plurality of filaments defining a plurality of openings therebetween; a distal end portion having a distal diameter; a proximal end portion having a proximal diameter that is larger than the distal diameter; and an intermediate portion having an intermediate diameter that is smaller than the distal diameter.

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.

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.

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.