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 9% or multiples of 9% of the total body surface.

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 proportion of body surface area each body part represents in adults.

3. Importance of %TBSA Calculation

Details: Accurate %TBSA calculation is crucial for determining burn severity, guiding fluid resuscitation, and assessing prognosis. Burns >20% TBSA in adults are considered major burns requiring specialized care.

4. Using the Calculator

Tips: Enter the percentage burned for each body region. The calculator automatically sums the values to give the total body surface area affected. Remember that the Rule of Nines applies to adults; different proportions apply to children.

5. Frequently Asked Questions (FAQ)

Q1: Why is the Rule of Nines important?
A: It provides a quick, standardized method to estimate burn size, which is critical for treatment decisions and fluid resuscitation calculations.

Q2: Does this apply to children?
A: No, children have different body proportions. The Lund-Browder chart is more accurate for pediatric patients.

Q3: What about partial thickness vs full thickness burns?
A: The Rule of Nines estimates total area affected. Depth of burn should be assessed separately as it affects treatment.

Q4: How accurate is the Rule of Nines?
A: It provides a rough estimate. For more precise measurement, the Lund-Browder chart or digital tools may be used.

Q5: What's the significance of the palm method?
A: For small burns, the patient's palm (including fingers) represents about 1% of TBSA and can be used to estimate burn size.