| 主权项 |
1. A delivery system comprising:
a cannula extending from a distal end to a proximal end; a stent-graft comprising:
a tubular graft extending from a proximal end to a distal end, the graft comprising a proximal portion, the graft comprising first and second longitudinally extending sides disposed opposite each other, an intersection of the first and second sides forming a tangent line that extends longitudinally along a length of the graft; a locking member extending from the distal end of the cannula, the locking member being movable between a locked position and a released position, wherein, when the locking member is in the locked position, the locking member restrains a surface of the graft against the cannula along the tangent line and a central axis of the cannula is spaced away from a central axis of the graft; and a first diameter reducing member, the first diameter reducing member extending from the distal end of the cannula and along a length of the graft, the first diameter reducing member being slidably connected to a first portion of the graft that is disposed closely adjacent to the tangent line in the proximal portion and traversing a lumen of the tubular graft to be slidably connected to a second portion of the graft that is disposed in a position circumferentially spaced away from the tangent line in the proximal portion, the first diameter reducing member having a restrained position and a released position, wherein, when the first diameter reducing member is in the restrained position the second portion of the graft is drawn toward the tangent line such that the proximal portion of the stent-graft has a reduced diameter configuration with at least two lobes that extend away from the tangent line and the cannula, and when the first diameter reducing member is in the released position, the second portion is disposed away from the first portion of the graft, the proximal portion of the graft thereby having a substantially tubular configuration. |
