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:

Where:

• Head — 9% of TBSA
• Each Arm — 9% of TBSA
• Each Leg — 18% of TBSA
• Front Torso — 18% of TBSA
• Back Torso — 18% of TBSA
• Genitals — 1% of TBSA

Explanation: The percentages are based on the relative surface area of each body part in adults. For children, different percentages apply due to their different body proportions.

3. Importance of TBSA Calculation

Details: Accurate TBSA estimation is crucial for determining burn severity, guiding fluid resuscitation, and predicting outcomes in burn patients.

4. Using the Calculator

Tips: Enter the percentage of each body region affected by burns. The calculator will sum all values to give the total body surface area affected.

5. Frequently Asked Questions (FAQ)

Q1: Why is the Rule of Nines important?
A: It provides a quick estimate of burn size which is critical for initial management decisions, especially fluid resuscitation.

Q2: Are there different rules for children?
A: Yes, children have proportionally larger heads and smaller legs, so modified percentages are used in pediatric cases.

Q3: What's considered a major burn?
A: Generally, burns >20% TBSA in adults or >10% in children are considered major burns requiring specialized care.

Q4: How accurate is the Rule of Nines?
A: It's a quick estimation tool. For more precise measurement, the Lund-Browder chart is often used.

Q5: What about smaller burns?
A: For smaller burns, the "palm method" can be used (patient's palm ≈1% of TBSA).