Abstract: A system for placement in at least one blood vessel includes a main graft body, one or more inflatable channels, and a filling structure. The one or more inflatable channels are attached to the main graft body. The filling structure is inflatable around at least a portion of the main graft body and at least a portion of at least one of the one or more inflatable channels. Various systems further include a graft extension that is insertable into a lumen formed by the main graft body, where the filling structure is inflatable around at least a portion of the graft extension. A method includes inserting a main graft body into a blood vessel, filling an inflatable channel attached to the main graft body, and filling a filling structure to inflate around at least a portion of the main graft body and at least a portion of the inflatable channel.

Abstract: A system for placement in at least one blood vessel includes a main graft body, one or more inflatable channels, and a filling structure. The one or more inflatable channels are attached to the main graft body. The filling structure is inflatable around at least a portion of the main graft body and at least a portion of at least one of the one or more inflatable channels. Various systems further include a graft extension that is insertable into a lumen formed by the main graft body, where the filling structure is inflatable around at least a portion of the graft extension. A method includes inserting a main graft body into a blood vessel, filling an inflatable channel attached to the main graft body, and filling a filling structure to inflate around at least a portion of the main graft body and at least a portion of the inflatable channel.

Abstract: The present invention includes a tool for forming an intravascular device such as a bifurcated stent graft. The tool includes a plurality of tool pieces wherein at least one tool piece is removably attached to another tool piece, and an external surface for assisting in forming the intravascular device. The tool may be used to form a stent graft by applying a first layer of biocompatible material over an external surface of the tool, applying a support structure over the first layer, and applying a second layer of biocompatible material over the support structure and the first layer. The present invention also includes two-piece stent grafts that may permit the mechanical attachment of one piece to another, and further includes bifurcated stent grafts having a support structure for loading the stent graft into a catheter with less bunching of the graft material than in conventional devices.