CPT® Code 33875

The CPT® Code 33875 refers to a surgical procedure involving the descending thoracic aorta, specifically the placement of a graft to address descending thoracic aneurysms. These aneurysms typically originate below the left subclavian artery and can extend into the abdominal aorta, leading to thoracoabdominal aneurysms. The procedure begins with an incision in the chest to expose the descending aorta. Depending on the clinical scenario, cardiopulmonary bypass may be utilized, which involves the placement of cannulas to establish bypass, allowing the heart and lungs to be temporarily taken over by a machine during the surgery. If bypass is not employed, a partial exclusion clamp is applied to the aorta to facilitate the procedure. Once access to the aorta is achieved, the aneurysm sac is opened, and any thrombus or plaque present within the aorta is carefully removed. A synthetic tube graft or conduit is then sutured to the healthy segments of the aorta, both proximal and distal to the aneurysm site, effectively replacing the weakened section of the aorta. After the graft is in place, the aneurysm sac is closed over the graft, and the clamps are released to restore normal blood flow. Additional steps may include the placement of chest tubes to manage any postoperative fluid accumulation, followed by the closure of the chest incisions. This procedure is critical for preventing complications associated with aneurysms, such as rupture, and is performed with careful attention to detail to ensure optimal outcomes for the patient.