Which of the following is true about the Rule of Nines?

• A. Used to assess the extent of burns
• B. Used to diagnose burns
• C. Used to monitor healing time
• D. Used to determine burn depth

Answer: (A)

The Rule of Nines is a quick way to estimate how much of the body's surface area is burned, which helps guide fluids and triage. In an adult, roughly 9% is the head and neck, 9% for each arm (18% total for both), 18% for the anterior trunk, 18% for the posterior trunk, 18% for each leg (36% total for both legs), and 1% for the genital area. This approximation lets you gauge the burn’s extent without intricate measurements. It does not diagnose burns, monitor healing time, or indicate burn depth, since depth—how deeply tissue is injured—requires other signs and assessments beyond surface area. For children, proportions differ, so age-appropriate charts are used for accuracy.