Anesthetic Considerations for Patients Undergoing Endovascular Abdominal Aortic Aneurysm Repair

Abstract

The aorta is the largest artery in the body. The aorta begins at the top of the left ventricle. The abdominal aorta begins at the aortic hiatus of the diaphragm, in front of the lower border of the body of the last thoracic vertebra, and ends on the body of the fourth lumbar vertebra, by dividing into the two common iliac arteries. An aneurysm is an abnormal dilatation in the wall of an artery. Normally, the walls of arteries are thick and muscular, allowing them to withstand a large amount of pressure. Occasionally, however, a weak area develops in the wall of an artery. This allows the pressure within the artery to push outwards, creating a bulge or ballooned area called an "aneurysm”. Aneurysms can form in any blood vessel, but they occur most commonly in the aorta , And Abdominal aortic aneurysms occur in the part of the aorta that passes through the middle to lower abdomen. Aortic aneurysms are classified by shape, location along the aorta, and how they are formed. And In 1986, Crawford described the first TAAA classification scheme based on the anatomic extent of the aneurysm.