What percentage of total body surface area is burned if the anterior parts of both arms and head are affected?

To determine the percentage of total body surface area (TBSA) that is burned when the anterior parts of both arms and head are affected, it is essential to understand the "Rule of Nines," a method used to estimate burn area in adults.

According to this rule, the total body surface area is divided into sections for quick assessment:

1. The entire head and neck account for approximately 9% of TBSA.

2. Each upper extremity (arm) accounts for approximately 9% of TBSA, with an additional 4.5% for the anterior side of each arm.

When evaluating a burn that affects the anterior parts of both arms and the head, we can break it down as follows:

• Anterior of both arms: 4.5% + 4.5% = 9%

• Anterior of the head: 4.5%

Adding these figures together provides:

9% (anterior of both arms) + 4.5% (anterior of the head) = 13.5%

Thus, the correct answer is 13.5%. This assessment is vital in clinical practice to guide appropriate treatment, fluid resuscitation, and referral decisions for patients with burns.