1. What is the Rule of Nines?

The Rule of Nines is a method used to estimate the total body surface area (TBSA) affected by burns. It divides the body into sections that represent approximately 9% (or multiples of 9%) of the total body surface area.

2. How Does the Calculator Work?

The calculator uses the Rule of Nines formula:

For children, different percentages apply:

• Head — 18% (due to proportionally larger head size)
• Each leg — 14%
• Other regions same as adults

3. Importance of TBSA Calculation

Details: Accurate TBSA estimation is crucial for determining fluid resuscitation needs, prognosis, and treatment decisions in burn patients. Burns covering >20% TBSA in adults or >10% in children typically require formal fluid resuscitation.

4. Using the Calculator

Tips: Select all affected body regions and specify whether the patient is an adult or child. The calculator will sum the percentages of all selected regions.

5. Frequently Asked Questions (FAQ)

Q1: Why are the percentages different for children?
A: Children have proportionally larger heads and smaller legs compared to adults, requiring adjusted percentages.

Q2: How accurate is the Rule of Nines?
A: It provides a quick estimate but may be less accurate for scattered burns. The Lund-Browder chart is more precise but requires more detailed measurement.

Q3: What about burns that don't cover whole regions?
A: For partial regions, you can estimate (e.g., half of the front torso = 9%). The palm of the patient's hand represents about 1% TBSA for smaller burns.

Q4: When should I use this calculator?
A: Use it for initial assessment of burn patients in emergency settings. More precise methods should be used for definitive treatment planning.

Q5: Are there limitations to this method?
A: It doesn't account for variations in body habitus (e.g., obesity) and may overestimate in some cases. Deep burns (3rd degree) may require different management regardless of size.