The American Society of Anesthesiologists (ASA) score is a system used by medical professionals to assess a patient's overall health status before undergoing anesthesia. The score ranges from ASA 1 (a normal, healthy patient) to ASA 6 (a brain-dead patient whose organs are being harvested for donation). A 'normal' ASA score typically refers to ASA 1 or ASA 2. ASA 1 indicates a healthy individual with no systemic disease, while ASA 2 represents a patient with mild systemic disease that is well-controlled, such as mild hypertension or controlled diabetes.