A patient has partial-thickness burns to the anterior chest and both anterior arms. Using the Rule of Nines, what percentage of TBSA is burned?

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Multiple Choice

A patient has partial-thickness burns to the anterior chest and both anterior arms. Using the Rule of Nines, what percentage of TBSA is burned?

Explanation:
Rule of Nines is used to estimate burn size by evaluating major body regions. The front of the chest (anterior chest) accounts for 9% of the total body surface area. Each arm’s anterior surface accounts for 4.5%—so both anterior arms together contribute 9%. Adding those together gives 9% (anterior chest) + 9% (both anterior arms) = 18% TBSA burned. Depth doesn’t change the percentage calculation, so the total burned area is 18%.

Rule of Nines is used to estimate burn size by evaluating major body regions. The front of the chest (anterior chest) accounts for 9% of the total body surface area. Each arm’s anterior surface accounts for 4.5%—so both anterior arms together contribute 9%. Adding those together gives 9% (anterior chest) + 9% (both anterior arms) = 18% TBSA burned. Depth doesn’t change the percentage calculation, so the total burned area is 18%.

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