The rule of nines gives an idea of how much of your total body's surface area a burn takes up. This informs treatments based on the size and intensity of the burn injury.
Rule of Nines: What Is It, and How Is It Used? - WebMD
For example, an entire arm is considered 9%, the stomach is 9%, the chest is 9%, and the entire head is 9%. However, the Rule of Nines: Adult image below divides the body into anterior and posterior sections, which is a common technique for memorization.
The Rule of Nines calculates the total body surface area involved in burn patients.
We explain this method, sometimes referred to as the Wallace rule of nines, and how it’s used, especially for children.
Learn fluid resuscitation for burns with the Parkland Formula and Rule of Nines. Step-by-step guide, calculations, examples, & nursing considerations.
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When measuring burns in adults, the rule of nines assesses the percentage of burn and is used to help guide treatment decisions including fluid resuscitation and becomes part of the guidelines to determine transfer to a burn unit.
The rule of nines was designed for adult patients. It is less accurate in young children due to their proportionally bigger heads and smaller mass in the legs and thighs, although one study did find it was accurate for patients as small as 10 kg. [1]
If you’re studying burns right now in class, you can probably count on a rule of nines burn question being on your exam. It’s a popular topic to cover on a burns exam.