CPT® Code 20661

The procedure described by CPT® Code 20661 involves the application of a cranial halo device, which is specifically designed to stabilize the cervical spine. This procedure is critical in cases where immobilization of the cervical region is necessary, often due to trauma or surgical interventions. The process begins with the preparation of the patient's scalp, where the four pin insertion sites are carefully shaved and cleansed using an anti-infective agent to minimize the risk of infection. Local anesthesia is then administered to ensure the patient's comfort during the procedure. The halo device is strategically positioned over the skull, with the anterior pins being inserted first. These pins are carefully placed through the skin and advanced until they engage the bone in a designated area known as the 'safe zone,' which is located just below the greatest circumference of the skull. This careful placement is crucial to avoid complications, such as damage to the orbit or surrounding nerves. Following the insertion of the anterior pins, the posterior pins are placed, and the diagonally opposed pins are tightened simultaneously to achieve the desired bone penetration. To ensure the stability and proper depth of the halo device, lock nuts are tightened. Finally, rods are attached to the halo, connecting it to a vest, cast, or traction setup, and it is important to note that the removal of the halo device is included in this procedure.