CPT® Code 33877

The CPT® Code 33877 refers to the surgical procedure known as the repair of a thoracoabdominal aortic aneurysm using a graft, which may be performed with or without the use of cardiopulmonary bypass. A thoracoabdominal aortic aneurysm is a serious condition characterized by an abnormal dilation of the aorta that occurs in the thoracic region and extends into the abdominal aorta. This type of aneurysm typically originates below the left subclavian artery and can pose significant risks, including rupture and life-threatening hemorrhage. The procedure involves a thoracoabdominal approach, which requires careful dissection and exposure of the aorta. During the surgery, the aneurysm sac is opened, and any thrombus or plaque is removed to facilitate the placement of a synthetic tube graft or conduit. This graft is then sutured to the healthy segments of the aorta, both proximal and distal to the aneurysm site, ensuring proper blood flow is restored. The procedure is complex and requires meticulous attention to detail, particularly when managing the surrounding structures, such as the lumbar and inferior mesenteric arteries, and ensuring that blood flow to the renal arteries is preserved if the aneurysm extends to that area. The successful completion of this procedure is critical for preventing complications associated with thoracoabdominal aortic aneurysms.