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, providing a quick way to assess burn severity.

2. How Does the Calculator Work?

The calculator uses the Rule of Nines for adults and adjusted percentages for children:

For children, percentages are adjusted because:

• Head represents a larger proportion (18%)
• Legs represent a smaller proportion (14% each)

3. Importance of TBSA Calculation

Details: Accurate TBSA estimation is crucial for fluid resuscitation (Parkland formula), determining burn severity, and guiding treatment decisions. Major burns (>20% in adults, >10% in children) often require specialized care.

4. Using the Calculator

Tips: Select all burned body regions and specify whether the patient is an adult or child. The calculator sums the percentages of selected areas.

5. Frequently Asked Questions (FAQ)

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

Q2: What about partial thickness burns?
A: Only include areas with 2nd or 3rd degree burns. 1st degree (superficial) burns shouldn't be included in TBSA calculations.

Q3: How accurate is the Rule of Nines?
A: It provides a quick estimate but may be less accurate for irregular burn patterns. The Lund-Browder chart is more precise for children.

Q4: What's considered a major burn?
A: Generally >20% TBSA in adults, >10% in children, or burns involving face, hands, feet, or perineum.

Q5: How does this affect fluid resuscitation?
A: The Parkland formula uses TBSA to calculate fluid requirements (4ml x %TBSA x kg body weight in first 24 hours).