CPT® Code 61702

The procedure described by CPT® Code 61702 involves surgical intervention on a simple intracranial aneurysm located within the vertebrobasilar circulation, utilizing an intracranial approach. A simple intracranial aneurysm is characterized by its size, specifically being 15 mm or less in diameter, and the absence of calcification at the neck of the aneurysm. Additionally, these aneurysms do not incorporate normal vessels into their necks, which simplifies the surgical approach. The surgical technique does not necessitate complex measures such as temporary vessel occlusion, trapping, or the use of cardiopulmonary bypass, making it a more straightforward procedure. The choice of surgical approach is determined by the precise location of the aneurysm, with options including access through the interhemispheric fissure or the pterion. The procedure begins with an incision through the skin and subcutaneous tissue, followed by a craniectomy to remove the overlying bone. Once the dura mater is opened, the arachnoid membrane is carefully nicked, and cerebrospinal fluid may be drained to enhance visibility and access to the internal carotid or vertebrobasilar artery. The surgeon then identifies and separates the artery from the arachnoid membrane, exposing the aneurysm. The definitive treatment for simple aneurysms typically involves the application of a clip to permanently exclude the aneurysm from the intracranial circulation, thereby preventing potential complications such as rupture or hemorrhage.