CPT® Code 33315

An exploratory cardiotomy, as defined by CPT® Code 33315, is a surgical procedure that involves making an incision in the heart to investigate and address specific issues within its chambers. This procedure is particularly focused on the removal of any foreign bodies or thrombi (blood clots) that may be present in the atria or ventricles of the heart. The term 'cardiotomy' refers to the surgical opening of the heart, and it can also be described using the terms 'exploratory atriotomy' for the atrial chambers or 'ventriculotomy' for the ventricular chambers. The procedure typically begins with a midline sternotomy, which is an incision made through the sternum to provide access to the heart. In cases where cardiopulmonary bypass is necessary, the aorta is cannulated, and the superior and inferior vena cava are also accessed to facilitate the bypass. This allows for the heart to be temporarily stopped, enabling the surgeon to safely inspect the heart chambers. Once the heart wall is incised, the interior of the affected chamber is examined, and any identified foreign bodies or thrombi are carefully removed. After the necessary interventions, the incisions in the heart wall are closed, and if cardiopulmonary bypass was utilized, it is subsequently terminated. The procedure concludes with the placement of chest tubes as required and the closure of the chest wall incision. It is important to note that CPT® Code 33315 is specifically used when cardiopulmonary bypass is involved, while code 33310 is designated for exploratory cardiotomy performed without the use of cardiopulmonary bypass.