Abstract: A support ring for an aortic prosthesis includes a helical coil extending in an arc and defining a space between a helical coil first end and helical coil second end in opposing relation to each other. A wire extending through the lumen defined by the helical coil includes a wire first end and a wire second end that are fixed to each other, and a length between the wire first end and the wire second end that traverses the space between helical coil first end and the helical coil second end. A branch sleeve assembly includes a graft sleeve having a proximal end that defines a plane that intersects a plane defined by the distal end of the graft sleeve, and a support ring fixed to the graft sleeve wall that is closer to the proximal end of the graft sleeve than to the graft sleeve distal end.

Abstract: A stent graft and methods for treatment of aortic aneurysms includes a tubular graft component defining an inside surface, and outside surface, an open proximal end, an open distal end, and the fenestration. A proximal radial stent is proximal to the fenestration and a distal radial stent is distal to the fenestration. A ring at the tubular graft component extends along the tubular graft component and around the fenestration. A liner extends between the inside surface and the outside surface, and through the fenestration, the ring thereby being sealed from exposure at one surface of the tubular graft component by the liner, and at the other surface of the tubular graft component by the tubular graft component and the liner.

Abstract: A stent graft for treating an arterial aneurysm includes loops fixed to struts of stents, wherein the struts define distal and proximal apices. The ends of a ligature can be linked by a wire in a stent graft delivery system that threads anchor loops longitudinally spanning ends of the ligature to maintain the stent in a radially constricted position during delivery to the aneurysm. A delivery system and method for implanting a stent graft prosthesis includes and employs a torque component at a distal end of the stent graft prosthesis, whereby following advancement of the stent graft to a surgical site in a constrained or partially constrained configuration, torque is applied to the torque component to rotationally align the stent graft about a longitudinal axis of the stent graft, followed by deployment of the stent graft in correct rotational alignment.

Abstract: At least one of axial stiffness (i.e. bending stiffness) and radial stiffness of a luminal stent of a luminal stent assembly, or of the luminal stent assembly, linking a fenestrated aortic prosthesis to a branch of a branched artery, decreases with increasing distance from a proximal end of the luminal stent or the luminal stent assembly, and a method of their use implants the luminal stent, the luminal stent, or a luminal stent system that includes at least one of the luminal stent or stent assembly in a branched artery to therapeutically treat a diseased tissue at the branched artery.