I borrowed this from a medical web site:
Endovascular Stent Surgery: Most thoracic aortic aneurysms are now treated with a minimally invasive approach called endovascular stent-graft repair, instead of conventional surgery. In this approach, a catheter is used to insert and guide a stent-graft (a polyester tube covered by a tubular metal web) into the aorta to the site of the aneurysm. The procedure begins by making a small incision in the groin and inserting the stent-graft into the femoral artery (which descends directly from the aorta). Using fluoroscopy (a continuous x-ray technique) and transesophageal echocardiography (TEE), the stent-graft is guided through the aorta to the aneurysm. With the stent-graft in place, blood flows through the stent-graft instead of through the aneurysm, eliminating the risk of rupture. This procedure may not require general anesthesia, and patients may have only a two-day hospital stay.
I will be under general anesthesia. I have rather bad arthritis in my lower spine so spinal anesthesia isn't the best option. I kind of think just waking up after the whole thing may be best any way. Well more later.