The correct answer is 2. Using the rule of nines, the face represents 4.5%, and the upper extremity represents 4.5%, making a total of 9% for this patient. The "rule of nines" is a method used to estimate the total body surface area (TBSA) affected by burns in adults to help quickly assess the severity of a burn injury and determine the appropriate treatment and fluid resuscitation. The breakdown of the rule of nines for adults includes:
--Head and Neck: 9% (Front: 4.5%, Back: 4.5%)
--Upper Limbs (Each Arm): 9% (Front: 4.5%, Back: 4.5%)
--Chest: 18% (Front: 9%, Back: 9%)
--Abdomen: 18% (Front: 9%, Back: 9%)
--Upper Back and Lower Back: 18% (Upper Back: 9%, Lower Back: 9%)
--Lower Limbs (Each Leg): 18% (Front: 9%, Back: 9%)
--Perineum (Genitalia and Anus): 1%
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