The present disclosure provides a stent graft comprising (a) a self-expandable stent structure and a graft covering positioned over the self-expandable stent structure, the self-expandable stent structure having a first end and a second end, wherein the self-expandable stent structure defines a lumen, and (b) at least one annular channel defined by at least one of the self-expandable stent structure and the graft covering and extending radially outward from the self-expandable stent structure or at least one annular protrusion defined by at least one of the self-expandable stent structure and the graft covering and extending radially inward from the self-expandable stent structure.
