AEMCA Practice Exam

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What is the total body surface area percentage represented by an adult arm using the rule of nines?

  1. 1%

  2. 9%

  3. 18%

  4. 36%

The correct answer is: 9%

The total body surface area percentage represented by an adult arm using the rule of nines is 9%. The rule of nines is a method used to assess the extent of burns by estimating the percentage of total body surface area involved. According to this rule, each arm accounts for 9% of the body's surface area. This assessment helps in determining the severity of burns and guiding treatment decisions, such as fluid resuscitation. In the context of the rule of nines, the entire body is divided into sections that each represent a specific percentage. For an adult, the two arms each represent 9%, making a total of 18% for both arms. However, when considering just one arm, the percentage is clearly defined as 9%. This systematic approach allows clinicians to quickly evaluate burn injuries and prioritize medical interventions accordingly.

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