Composite stent graft
View Patent ↗A composite stent graft has a balloon expandable stent portion ( 3 ), a tubular graft material portion ( 1 ) inside or outside of the balloon expandable stent portion and self expanding stents ( 5 ) associated with the tubular graft material portion. Part ( 7 ) of the balloon expandable stent portion can extend beyond the proximal end ( 9 ) of the tubular graft material portion. The tubular graft material can be polytetrafluoroethylene, Dacron, Thoralon™, polyamide, small intestine submucosa, collagenous extracellular matrix material, or any other suitable biocompatible material. A method of deploying which includes flaring a part ( 7 ) of the balloon expandable stent portion is also discussed.
1. A stent graft comprising a tubular body of a biocompatible graft material, the tubular body comprising a first end and a second end, a lumen therethrough, being of a selected diameter and the tubular body comprising an inside and an outside, a balloon radially expandable stent inside the first end of the tubular body and an extension portion of the balloon radially expandable stent extending longitudinally beyond the first end of the tubular body whereby the extension portion of the balloon expandable stent can be expanded with a balloon to expand radially beyond the selected diameter of the tubular body, a plurality of self radially expanding stents spaced apart on the tubular body and positioned on the outside of the tubular body towards the second end of the tubular body and a terminal self radially expanding stent on the inside of the tubular body at the second end of the tubular body.
2. A stent graft as in claim 1 wherein the graft material is selected from at least one of the group consisting of polytetrafluoroethylene, polyethylene terephthalate fiber, polyamide, small intestine submucosa, collagenous extracellular matrix material, biocompatible polyurethane material, and any other suitable biocompatible material.
3. A stent graft as in claim 1 wherein the self expanding stents comprise at least one of nitinol, stainless steel and any other suitable biocompatible material.
4. A stent graft as in claim 1 wherein the self expanding stents are Gianturco type zigzag Z stents.
5. A stent graft as in claim 1 wherein the balloon expandable stent is formed from a shape memory metal material including nickel, titanium and magnesium alloys.