Patent ID: 7717950

Claim:
A method of deploying a stent-graft using a stent-graft deployment system having a retractable primary sheath and a flexible secondary sheath wherein the primary sheath is disposed about the secondary sheath, comprises the steps of: providing the stent-graft deployment system with a stent-graft, wherein in a predeployed condition said stent-graft is contained within the flexible secondary sheath and retained in a first constrained small diameter configuration by the primary sheath; tracking the stent-graft deployment system over a guide wire to a location before a target area, wherein the target area may include a curved portion; retracting the primary sheath to expose the flexible secondary sheath containing the stent graft, wherein when said primary sheath is retracted from around said flexible secondary sheath substantially an entire length of said stent-graft expands within said flexible secondary sheath to a second constrained small diameter configuration larger than said first constrained small diameter; further tracking the stent graft deployment system to place the secondary sheath containing the stent-graft in the second constrained small diameter configuration to a location within the target area; and retracting the secondary sheath to at least partially deploy the stent-graft in the target area.