What does the Glasgow Coma Scale measure and when is it used in the field?

• A. Heart rate variability
• B. Blood pressure
• C. Respiratory rate only
• D. Level of consciousness; used to assess head injury severity

Answer: (D)

Glasgow Coma Scale is a quick, standardized way to judge a person’s level of consciousness after a head injury. It scores three areas—eye opening, verbal response, and motor response—giving a total from 3 to 15. In the field, this lets responders rapidly gauge injury severity and monitor for change during transport. A lower score indicates deeper unconsciousness and more serious brain injury, guiding decisions about airway protection, need for urgent care, and how to communicate status to the hospital. It’s not about heart rate, blood pressure, or respiratory rate alone; those are separate vital signs. The key idea is measuring consciousness level to assess head injury severity.