Abstract: An endoluminal stent is formed in a modular construction to include an elongate spine and a plurality of generally tube-defining modules attached to the spine in a longitudinally sequenced array. Each module defines, in cooperation with the spine, a closed ring-like structure, with the modules being aligned in an array to define a generally tubular structure. Each of the modules is radially expandable from a reduced diameter, low profile configuration, in which it is readily navigated through the body passages, to an expanded diameter engageable with the inner luminal surface of the body lumen. The stent, being of modular construction, can be built to individual specifications for specific procedure in a specific patient. Modules are formed from a wire shaped in a flat serpentine configuration that is then wrapped in a cylindrical configuration with its free ends connected to the spine. The modules are expandable, as by a balloon, from a low profile to an expanded configuration.
Abstract: A bifurcated endovascular stent is formed from a pair of individual tubular component stents that can be placed independently in sequence in the branched region of a body vessel to form the bifurcated stent in situ. The first placed component stent includes a side opening and may be placed to extend both proximally and distally of the bifurcated junction with the side opening facing the entry to the branch vessel. The first component stent then is expanded within the vessel. The second component stent then can be advanced through the first component stent, through the side opening and into the branch vessel where it can be expanded. The portions of the first and second component stents that surround the region of the vessel juncture are constructed to provide enhanced lateral support for the walls of the vessel in the region of the junction.
Abstract: A method for securely mounting an endovascular stent (2) to a balloon catheter (3, 5) involves the use of a loading device (1) that includes a longitudinal sheath having an opening (10) into which the balloon (5) is inserted. The stent is supported slidably along the outside of the sheath so that it can be slid along the sheath into a position coaxially about the balloon. The stent then is released into stable and secure engagement with the balloon (5) by withdrawing the sheath from between the stent and the balloon. The method may be used in conjunction with a stent that is elastically deformable to a diameter enabling it to be placed about the balloon and then permitted to tighten, elastically, into secure engagement with the balloon, gradually and uniformly. The sheath may be in the form of longitudinal elements (7) connected at one end to a support (6) and having free opposite ends.
Abstract: A bifurcated endovascular stent is formed by a pair of tube-defining members, one of which is open at its ends and has a lateral opening between its ends. The other tubular structure is adapted to be advanced into one end of the first tube and exit through the lateral opening. The tube-defining members are formed in modular construction, each including an elongate spine and a plurality of generally tube defining modules attached to the spine in a longitudinally sequenced array. The modular construction enables a wide range of variations in the characteristics of the stent, including longitudinal flexibility, radial expansion among others.