Tested on Gulf Medical Boards (DHA, SMLE, MOH & HAAD)
Clinical calculations and diagnostic scoring systems like Rule of Nines frequently appear on Prometric exams. Master high-yield clinical vignettes with instant AI-powered pathophysiology rationales.
What is the Rule of Nines?
The Rule of Nines is an evidence-based clinical decision rule engineered to quantify diagnostic probability, stratify clinical severity, and guide therapeutic decision-making in emergency medicine practice. The Wallace Rule of Nines is a tool used by emergency and pre-hospital providers to quickly estimate the Total Body Surface Area (TBSA) affected by a burn in an adult patient. This is crucial for guiding fluid resuscitation. Clinical scoring tools like Rule of Nines are essential in acute and outpatient management, enabling clinicians to objectively differentiate between low-risk candidates suitable for conservative therapy and high-risk patients requiring urgent interventions. Verified against current 2026 clinical standards, this tool is extensively tested on Gulf health authority licensing exams including DHA (Dubai), SMLE (Saudi Arabia), MOH, HAAD/DOH (Abu Dhabi), OMSB (Oman), and QCHP (Qatar).
💡Clinical Pearls & Diagnostic Utility
Provides a rapid, standardized method for first responders and ER clinicians to calculate the percentage of skin burned, which directly dictates fluid resuscitation volumes.
Formula & Calculation Parameters
The mathematical equation and clinical variables required to calculate Rule of Nines:
Score Interpretation & Clinical Stratification
| Score Range | Clinical Interpretation | Risk Tier |
|---|---|---|
| ≤ 15 | Minor / Moderate Burn | yellow |
| ≥ 15 | Major Burn (Needs Resuscitation) | red |
When to Exercise Caution
Only applies to adults. Children have relatively larger heads and smaller legs, requiring the pediatric-specific Lund-Browder chart.
Clinical Review Board
Dr. Muhammad Nouman, MBBS
Capital Medical University | PMDC Reg No: 117744-P
Clinical Audit Status
✓ Verified for 2026 Guidelines
Last updated: 2026-08-07
Peer-Reviewed Medical Literature
- •Wallace AB. The exposure treatment of burns. Lancet. 1951;1(6653):501-504.
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