## BSA Estimation Methods in Pediatric Burns **Key Point:** The Lund and Browder Chart is the gold standard for accurate BSA estimation in children, particularly those <10 years of age, because it accounts for the disproportionately large head and smaller lower extremities in young children. ### Comparison of BSA Estimation Methods | Method | Best Used In | Accuracy | Advantages | Limitations | | --- | --- | --- | --- | --- | | **Rule of Nines** | Adults and children >10 years | Moderate | Quick, easy to remember | Inaccurate in young children; overestimates head, underestimates legs | | **Lund and Browder Chart** | All ages, especially <10 years | High | Age-specific adjustments; accounts for body proportions; most precise | Requires chart; slower than Rule of Nines | | **Wallace Rule** | Adults primarily | Moderate | Simple mnemonic | Same limitations as Rule of Nines | | **Berkow Formula** | Pediatric burns | High | Age-adjusted percentages | Less commonly used; requires calculation | ### Age-Related BSA Differences in Children In a 3-year-old child: - **Head:** ~18% (vs. 9% in adults) - **Each lower limb:** ~13.5% (vs. 18% in adults) - **Trunk:** ~18% (similar to adults) **High-Yield:** The Lund and Browder Chart is the **most accurate** method for pediatric burns because it provides age-specific percentages that reflect the child's actual body proportions. **Clinical Pearl:** In emergency settings, the Rule of Nines may be used for initial triage and fluid resuscitation initiation in children, but the Lund and Browder Chart should be consulted for definitive BSA assessment and transfer to a burn center. **Warning:** Using the Rule of Nines in a 3-year-old will **overestimate** the burn severity if the burn involves the lower extremities and **underestimate** if the burn is on the head, leading to inappropriate fluid resuscitation.
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