CPT® Code 61151

A burr hole or trephine procedure involves creating a small opening in the skull to access the brain for the purpose of draining an intracranial abscess or cyst. This procedure is typically performed when there is a need to relieve pressure or remove infected material from the brain. The process begins with an incision in the scalp, which is then flapped forward to expose the underlying bone. A surgical drill or perforator is used to create a burr hole, or alternatively, a trephine may be employed to remove a small disc of bone. Once the skull is accessed, the dura mater, which is the outermost layer of the protective covering of the brain, is incised to allow access to the brain tissue. To manage any bleeding that may occur during the procedure, electrocautery is utilized. A needle is then carefully inserted and advanced to the site of the abscess or cyst. The capsule of the abscess or cyst is perforated to facilitate drainage. After the obturator is removed from the needle, a syringe is attached to aspirate the contents of the cyst or abscess. Following the drainage, the needle is withdrawn, the dura is closed, and the defect in the skull is repaired either by replacing the bone disc or applying bone wax. It is important to note that CPT® Code 61150 is used for the initial drainage of the brain abscess or cyst, while CPT® Code 61151 is designated for subsequent tapping with aspiration of the intracranial abscess or cyst.