Method of use for delivery system for radially constricting a stent graft

A method of implanting a stent graft at an aneurysm site of a subject, comprising the steps of:

• a) directing a stent graft to an aneurysm site of the subject, a proximal end of the stent graft being held in a radially constricted position by at least one wire configured as a loop that extends through at least two tubes and is at least partially secured to the stent graft in a delivery system, wherein the delivery system includes
• i) a handle,
• ii) a guidewire catheter extending distally from the handle and having a proximal end and a distal end, the guidewire catheter defining a longitudinal axis,
• iii) the at least two tubes, each having a proximal end and a distal end, the tubes extending distally from the handle and arranged in parallel with the guidewire catheter,
• iv) the at least one wire extending through two of the at least two tubes, wherein each wire is configured as the loop at the distal end of the at least two tubes, and having at least one proximal end at the handle, and
• v) the stent graft having the proximal end and a distal end, and defining a lumen, the stent graft extending about the guidewire catheter and the at least two tubes, wherein the distal ends of the tubes are within the lumen, the loop of the at least one wire at least partially securing the stent graft by being positioned within the stent graft, whereby pulling the at least one wire at the proximal end of at least one of the at least two tubes causes reduction in a length of the loop and consequent radial constriction of the stent graft at the loop;
• and
• b) variably moving the proximal end of the at least one wire at the handle in a distal or proximal direction, to variably increase and decrease radial constriction of the stent graft to assist axial and longitudinal alignment of the stent graft at the aneurysm to thereby implant the stent graft at the aneurysm of the subject.