In the baby/small child Rule of Nines, what percentage is allocated to the back?

In the baby/small child Rule of Nines, what percentage is allocated to the back?

• A. 13%
• B. 6%
• C. 21%
• D. 18%

Answer: (A)

In infants, body proportions differ from adults, so the burn-surface-area estimates are age-adjusted. The head is relatively large, and the limbs are proportionally smaller, which shifts how the trunk is divided between the front and back. The back portion of the trunk is allocated about 13% of total body surface area in the pediatric Rule of Nines. This adjustment keeps the total at 100% while reflecting the baby’s anatomy, which is why the back is 13% in this age group.

In infants, body proportions differ from adults, so the burn-surface-area estimates are age-adjusted. The head is relatively large, and the limbs are proportionally smaller, which shifts how the trunk is divided between the front and back. The back portion of the trunk is allocated about 13% of total body surface area in the pediatric Rule of Nines. This adjustment keeps the total at 100% while reflecting the baby’s anatomy, which is why the back is 13% in this age group.