CPT® Code 33764

The procedure described by CPT® Code 33764 involves the creation of a central shunt using a prosthetic graft, specifically designed to connect the ascending aorta to the main pulmonary artery. This surgical intervention is typically classified as a closed heart procedure and is often employed as a temporary solution to manage symptoms of cyanosis, which can arise from various cardiac anomalies, including tetralogy of Fallot. The term 'shunt' refers to a passage or an artificial channel that allows blood to flow from one area to another, thereby bypassing a defect or obstruction in the heart or blood vessels. In this case, the shunt facilitates improved blood flow and oxygenation by redirecting blood from the aorta to the pulmonary artery. The procedure necessitates a median sternotomy, which is an incision made along the sternum to provide access to the heart and surrounding structures. During the operation, the thymus gland is resected, and the pericardium, the protective sac surrounding the heart, is incised and suspended to allow for better visibility and access to the heart's major vessels. The preparation for anastomosis involves meticulous handling of the ascending aorta and the main pulmonary artery to ensure a secure connection with the prosthetic graft. Depending on the patient's condition, the procedure may be performed with or without the use of cardiopulmonary bypass, which temporarily takes over the function of the heart and lungs during surgery. The insertion of a synthetic tube graft with beveled ends into the designated vessels is a critical step, followed by suturing to secure the graft in place. The procedure concludes with the careful reapproximation of the pericardium, placement of chest tubes if necessary, and closure of the chest incision, ensuring that the patient is monitored closely for recovery and any potential complications.