A multi-port stent graft delivery device (100) has an annular access lumen (107) between a delivery catheter (112) and a main sheath (106), at least one indwelling access sheath (118, 122) within the access lumen, and an indwelling guide wire (138, 146) within the or each access sheath and a stent graft (131) retained in the delivery device. Upon deployment of the stent graft into the vasculature of a patient the indwelling guide wire can be used to facilitate stabilisation of the access sheath during cathertisation of a side branch and deployment of a side arm covered or uncovered stent therein through the advanced access sheath. A two part handle enables withdrawal of a nose cone dilator before final placement of the side arm stents. A manifold (114) associated with a proximal handle portion provides a plurality of access ports (116, 120).
