A combination of a branched stent graft and an introducer configured to deploy the branched stent graft into a body vessel having a main vessel, the body vessel having a first branch vessel extending from the main vessel, a second branch vessel extending from the main vessel, a bifurcation between the first and second branch vessels, and a third vessel extending from the first branch vessel and having an ostium; the branched stent graft comprising a main body having a distal end, a proximal end with a main lumen therethrough, at least two main body stents, and a branch extending from the main body between the main body distal end and the main body proximal end, more proximate the proximate end, the branch having a branch lumen therethrough in fluid communication with the main lumen, a distal open end, and a stent adjacent the distal open end; the introducer comprising a sheath disposed over the branched stent graft, a first guide wire catheter configured to receive a first guide wire, characterised by a second guide wire catheter configured to receive a second guide wire, the second guide wire catheter disposed at least partially adjacent the first guide wire catheter, an outer catheter disposed over the first guide wire catheter and the second guide wire catheter and disposed within the sheath, wherein the second guide wire catheter has a portion that extends from a distal portion of the introducer to the distal end of the main body of the branched stent graft, a portion that extends outside of and at least partially along the main body of the branched stent graft, a portion that extends into the distal open end of the branch and through the branch lumen to the main lumen, and a portion that extends out of the main lumen at the proximal stent graft end and into a groove in a nose cone. the branched stent graft comprising a main body having a distal end, a proximal end with a main lumen therethrough, at least two main body stents, and a branch extending from the main body between the main body distal end and the main body proximal end, more proximate the proximate end, the branch having a branch lumen therethrough in fluid communication with the main lumen, a distal open end, and a stent adjacent the distal open end; the introducer comprising a sheath disposed over the branched stent graft, a first guide wire catheter configured to receive a first guide wire, characterised by a second guide wire catheter configured to receive a second guide wire, the second guide wire catheter disposed at least partially adjacent the first guide wire catheter, an outer catheter disposed over the first guide wire catheter and the second guide wire catheter and disposed within the sheath, wherein the second guide wire catheter has a portion that extends from a distal portion of the introducer to the distal end of the main body of the branched stent graft, a portion that extends outside of and at least partially along the main body of the branched stent graft, a portion that extends into the distal open end of the branch and through the branch lumen to the main lumen, and a portion that extends out of the main lumen at the proximal stent graft end and into a groove in a nose cone.