| 主权项 |
1. A stent graft deployment system comprising:
a delivery device having an operator end and a deployment end; a stent graft disposed at the deployment end, the stent graft having a proximal end nearest the deployment end, a distal toward the operator end, a generally tubular structure, a length, a proximal end stent at the proximal end of the stent graft, a distal end stent at the distal end of the stent graft, and at least one intermediate stent between the proximal end stent and the distal end stent; a plurality of releasable constraining mechanisms arranged along the length of the stent graft, wherein at least one of the plurality of constraining mechanisms extends circumferentially about a portion of each of the proximal end stent, the distal end stent, and the at least one intermediate stent to hold the proximal end stent, the distal end stent and the at least one intermediate stent in a constrained configuration; and an actuation mechanism including a plurality of release wires or rods coupled to the constraining mechanisms to form a plurality of couplings between the release wires or rods and the constraining mechanisms about the circumference of the constraining mechanisms; wherein the release wires or rods are configured to be withdrawn from the couplings to release the constraining mechanisms and expand the stent graft; and wherein the release wires or rods are further configured to release different couplings of each of the constraining mechanisms at different times whereby to release each of the constraining mechanisms in stages both circumferentially and longitudinally from the proximal end of the stent graft to the distal end of the stent graft. |
