When complications occur after operating on a descending thoracic aorta, perhaps the most devastating is:

C. Paraplegia.

DISCUSSION: Although the recurrent nerve can be stretched and hoarseness seen after operations in the area of the isthmus of the thoracic aorta and bleeding associated with aneurysm repair as well as renal insufficiency from the cross-clamping of the vessel above the renals, they are usually insignificant compared to the problem that occurs when paraplegia follows operation on the descending thoracic or thoracoabdominal aorta. Not only is there a loss of function in the legs, but bowel and bladder function are usually seriously affected. The psychological effects of paraplegia may also be devastating.