1. A new predictive model for adverse outcomes after elective thoracoabdominal aortic aneurysm repair 
Scott A LeMaire, MD, Charles C Miller, PhD, Lori D Conklin, MD, Zachary C Schmittling, MD, Cüneyt Köksoy, MD, Joseph S Coselli, MD 
The Annals of Thoracic Surgery 
Volume 71, Issue 4, Pages (April 2001)
DOI: /S (00)

2. Fig 1
The Crawford classification of thoracoabdominal aortic aneurysms is based on the extent of aortic involvement. Extent I aneurysms begin above the sixth intercostal space (usually near the left subclavian artery) and extend down to encompass the aorta at the origins of the celiac axis and superior mesenteric arteries; although the renal arteries may also be involved, the aneurysm does not extend into the infrarenal segment. Extent II aneurysms also arise above the sixth intercostal space but extend distally into the infrarenal aorta, often to the level of the aortic bifurcation. Extent III aneurysms begin in the distal half of the descending thoracic aorta (below the sixth intercostal space) and extend into the abdominal aorta. Extent IV aneurysms generally involve the entire abdominal aorta from the level of the diaphragm to the bifurcation.
The Annals of Thoracic Surgery  , DOI: ( /S (00) )

3. Fig 2
Risk stratification curves to allow rapid estimation of the risk for an adverse outcome after elective surgical repair of a thoracoabdominal aortic aneurysm (A) is used for patients requiring an extent II repair and (B) is used for patients undergoing an extent I, III, or IV repair.
The Annals of Thoracic Surgery  , DOI: ( /S (00) )