945 results about "Side branch" patented technology

A method of implanting first and second stents with associated grafts within first and second vessel regions extending at an angle with respect to each other comprising inserting a first guidewire to guide a first stent with an associated first graft to the first vessel region, inserting a second guidewire to guide a second stent with an associated second graft to the second vessel region, inserting first and second delivery sheaths containing the first and second stent with the associated grafts over the first and second guidewires and removing the first and second delivery sheaths to enable the first and second stents with the associated grafts to expand against the wall of the first and second vessel regions, respectively. A delivery system is also disclosed.

An apparatus and method is provided for stenting bifurcated vessels. A proximal angled stent is configured for implanting in a side-branch vessel wherein the proximal angled stent has an angulated portion that corresponds to the angle formed by the intersection of the side-branch vessel and the main vessel so that all portions of the side-branch vessel at the bifurcation are covered by the proximal angled stent. A main-vessel stent is provided for implanting in the main vessel, wherein the main-vessel stent has an aperture or stent cell that aligns with the opening to the side-branch vessel to permit unobstructed blood flow between the main vessel and the side-branch vessel. Side-branch and main-vessel catheter assemblies are advanced over a pair of guide wires for delivering, appropriately orienting, and implanting the proximal angled stent and the apertured stent.

A system for treatment of a vessel bifurcation and its method of use comprises a catheter having a catheter shaft, a portion of which is characterized as an axle about which a rotatable assembly is disposed and rotatable thereabout. The system employs a series of lumens, openings and / or ports to provide a balloon mounted on the rotatable assembly with fluid communication to the catheter shaft.

An apparatus and method is provided for stenting bifurcated vessels. A proximal angled stent is configured for implanting in a side-branch vessel wherein the proximal angled stent has an angulated portion that corresponds to the angle formed by the intersection of the side-branch vessel and the main vessel so that all portions of the side-branch vessel at the bifurcation are covered by the proximal angled stent. A main-vessel stent is provided for implanting in the main vessel, wherein the main-vessel stent has an aperture or stent cell that aligns with the opening to the side-branch vessel to permit unobstructed blood flow between the main vessel and the side-branch vessel. Side-branch and main-vessel catheter assemblies are advanced over a pair of guide wires for delivering, appropriately orienting, and implanting the proximal angled stent and the apertured stent.

A method of sizing of a stent graft ( 20 ) including placement of fenestrations ( 30, 32 ) to ensure access to side branch vessels ( 13, 15 ) through the fenestrations when the stent graft is introduced into a body vessel and an assembly method for a stent graft including temporary diameter reduction arrangements to enable partial release of a stent graft to assist with positioning of fenestrations with respect to side branch vessels. The method includes spacing the fenestrations to be the same circumferential distance as the side branch vessels irrespective of the diameter of the stent graft.

Embodiments of the present invention include a material comprising a polymer having a modulus of elasticity less than 105 Pa and a material comprising a polymer having a modulus of elasticity of less than 5×104 Pa. Embodiments also include a material comprising a polymeric network and a multiplicity of side chains attached to the polymeric network. The multiplicity of side chains may have an average molecular weight below the critical molecular weight for entanglements. In certain embodiments it may be advantageous for the side branches to have a glass transition temperature below the use temperature of the material. The polymer network may comprise at least two monomers so that the polymer network is a copolymer. Embodiments of the present invention also include methods of forming a polymer network. Such as, for example, a method of preparing a polymer network comprising cross-linking a polymer, wherein the polymer comprises a multiplicity of side chains. The polymer may be at least one of a polymer brush, a polymer comb, and a nanocomposite material. An additional embodiment may include polymerizing macromonomers in the presence of a crosslinking agent. This embodiment may result in the forming a polymer network, wherein the polymer network comprises a multiplicity of branches attached to the polymer network, wherein the macromonomers may have a molecular weight less than the critical molecular weight for entanglements. Another embodiment of the method of forming a polymer network may comprising polymerizing monomers directly from a crosslinked polymer network. This method may result in forming a branched polymer network, wherein the polymer network comprises a multiplicity of branches attached to the polymer network.

In at least one embodiment, a stent comprises a plurality of interconnected framework members defining a plurality of cells. A portion of the interconnected framework members comprise a side branch structure having an inner side branch cell that is shaped differently from other cells of the stent. The side branch structure further comprises a serpentine ring extending around the inner side branch cell, the serpentine ring having alternating struts and turns. Each strut includes curvature along its length and is oriented with the curvature being concave with respect to a center point of the inner side branch cell.