Which of the following represents the burn percentage for the anterior and posterior of both arms using the Rule of Nines?

Choice A rationale According to the Rule of Nines, the anterior surface of one arm represents 4.5% of the total body surface area (TBSA). The posterior surface of one arm also represents 4.5% of the TBSA. Therefore, the total TBSA for both the anterior and posterior of one arm is 9%. For both arms, the calculation would be twice that amount. Choice B rationale The Rule of Nines is a method to estimate the total body surface area affected by burns. Each arm (anterior and posterior combined) is considered to be 9% of the total body surface area. The anterior surface of an arm is 4.5% and the posterior is 4.5%, totaling 9% for one arm. Therefore, the anterior and posterior surfaces of both arms would be 9% + 9% = 18%. Choice C rationale This choice is incorrect because it represents the TBSA for only one entire arm (9%) and one entire leg (9%), or other combinations. The Rule of Nines designates a total of 9% for each arm. For both arms, the total is 18%. This value is a standard calculation in burn care to determine fluid resuscitation needs. Choice D rationale This choice is incorrect because it represents the TBSA for the entire head (9%), the entire trunk (36%), and both entire arms (18%). The sum is much greater than the requested area. Using the Rule of Nines, the entire body surface area is 100%. This option is an overestimation for the burn percentage of both arms.