Patent ID: 9107741
Filing Date: 2015-08-18
Classification: A61F

Abstract:
1. A flexible stent graft for deployment within a body vessel at a treatment site, the stent graft comprising a tubular body, having a first end, a second end, a side wall between the first and second ends, and a tubular side arm attached to and extending at an acute angle from the side wall between the first and the second ends at an aperture in the tubular body, the tubular side arm thereby being in fluid communication with the tubular body, wherein at least a first portion of the tubular side arm comprises a graft material and a coiled stent including a plurality of helical turns with spacings between the turns, the coiled stent being affixed to an exterior of the graft material of the first portion by sutures stitched to the graft material and over the coiled stent, the first portion having a first portion diameter and the coiled stent comprising a helix diameter substantially the same as the first portion diameter, the coiled stent comprising a ratio of helical pitch to helix diameter of from about 1:2 to about 1:20, the helical pitch being the spacing between adjacent turns of the coiled stent, wherein the graft material of the first portion comprises a plurality of predetermined circumferential or helical crimps having alternating troughs and crests along a length of the first portion, the graft material thereby comprising a capacity to change in length during use, wherein the tubular body comprises a graft material and includes a number of external zigzag stents disposed along a length thereof, and wherein one of the external zigzag stent extends about both the tubular body and the side arm, and wherein a bend of the external zigzag stent is attached to the side arm in a manner that assists in the opening of the side arm.