A stent graft introducer has a pusher, a nose cone, a region between the pusher and the nose cone for a stent graft, a sleeve extending over the pusher and proximally to the nose cone to cover the stent graft when retained in the region. An indwelling auxiliary catheter with a pre-curved proximal end is fitted into the introducer. The nose cone has an elongate groove and the auxiliary catheter has its proximal end in the elongate groove. In a partially retracted position of the sleeve the curved proximal end of the indwelling auxiliary catheter is exposed and uncovered by the sleeve and in an advanced position of the sleeve the curved proximal end of the indwelling auxiliary catheter is straightened, extends along the length of the groove in the nose cone and is covered by the sleeve.