Method of using an endovascular stent-graft with an extra vascular extension

A method of using a stent-graft with branching graft to perform a medical procedure, where the stent-graft with branching graft includes a stent-graft having a first end, a second end, and an aperature through the stent-graft between the first end and the second end, and a vascular graft having a first end and a second end, where the first end of the vascular graft is attached to the aperture of the stent-graft and where the second end of the vascular graft extending away from the aperature of the stent-graft, and where a lumen of the stent-graft with branching graft includes a lumen of the sent-graft and a lumen of the vascular graft the method comprising:

• incising the skin of the patient's back to form an incision;
• puncturing the target vessel of the patient with a needle to form an opening in the target vessel;
• providing the stent-graft through the incision, through the opening in the target vessel, and into the lumen of the target vessel, and
• expanding the stent-graft such that the stent-graft contacts an inner surface of the target vessel,
• such that the stent-graft is within the target vessel,
• such that the vascular graft extends out of the target vessel through the opening to provide access to the interior of the target vessel through the patient's back.