Patent ID: 9622887
Date: 2017-04-18
CPC Classifications: A61F

Claim:
1. A stent graft comprising, a first end; a second end; a sidewall of graft material between the first end and the second end, the wall defining an internal lumen of the stent graft; a fenestration extending through the sidewall from an exterior of the stent graft to the interior of the stent graft; a valve arrangement extending within the internal lumen; the valve arrangement comprising a tube of graft material; the tube of graft material comprising a first end and a second end, the first end being fastened to an inside surface of the sidewall around the fenestration and the tube extending from the fenestration into the internal lumen; wherein the second end of the tube of graft material is biased into a flattened and closed configuration and a remainder of the tube from the fenestration to the second end is in an open and tubular configuration and configured to be flattened against the inside surface of the side wall upon application of fluid pressure to the tube to prevent fluid flow therethrough, such that the cross section of the entire remainder of the tube of graft changes from a substantially circular cross section to a flattened cross section at the second end upon the application of the fluid pressure but by deflection of the flattened cross section the tube of graft material can be opened to enable the passing of a medical device therethrough.