A delivery system for delivering an endovascular prosthesis is disclosed. A prosthesis is releasably coupled to a proximal end of the system. A handle assembly is disposed at the distal end of the delivery system. The handle assembly comprises a main handle and a second handle disposed at least partially on the main handle and longitudinally moveable relative to the main handle. A trigger wire release mechanism is disposed in the interior or the main handle. A sheath is operatively connected to the second handle and longitudinal movement of the second handle relative to the main handle retracts the sheath in a distal direction. Movement of the trigger wire release mechanism from a first position to a second deployed position is prevented when the sheath is in the first position. Methods for accessing the common and internal iliac arteries and delivering and deploying an endovascular graft therein using the delivery system and handle assembly are also disclosed.
