Burn Assessment and Management

Burn Surface Area Assessment Methods

The Wallace Rule of Nines is a commonly used method for quick estimation of burn surface area in the field, though it significantly overestimates TBSA and is not suitable for children 1
Each leg (including foot) accounts for 18% of the total body surface area (TBSA), with both legs together representing 36% of TBSA 1
The Lund-Browder chart is considered the most accurate method for TBSA quantification and is the reference standard recommended by burn specialists 1
The Lund-Browder chart accounts for age-related differences in body proportions, making it suitable for both adults and children 1
For quick estimation in the field, the patient's palm and fingers (approximately 1% TBSA) can be used as a reference point 1

The Rule of Nines significantly overestimates TBSA in 70-94% of cases 1
This overestimation can lead to excessive fluid administration during resuscitation 1
The Rule of Nines is particularly inaccurate for children due to their different body proportions 1

Accurate TBSA assessment is crucial for determining burn severity and guiding appropriate management 2
Burns covering >10% TBSA in adults or >5% in children should be referred to a burn center 2
For adults with burns >15% TBSA and children with burns >10% TBSA, fluid resuscitation should be initiated with 20 mL/kg of balanced crystalloid solution in the first hour 3, 2
Underestimation of TBSA can result in inadequate treatment and increased morbidity and mortality 1

Burns to the feet are considered critical areas requiring specialized care regardless of TBSA percentage 2, 4
Circumferential burns of the extremities may require escharotomy if they compromise circulation 1, 3
The assessment should be repeated during initial management as the burn appearance may evolve 1

For a burn patient with 14.5% TBSA, clinical judgment should guide initiation of fluid resuscitation based on signs of hypovolemia or shock, as they fall just below the typical threshold for adults 5
The total 24-hour fluid requirement can be calculated using the Parkland formula: 4 mL/kg × patient weight × % TBSA burned, with half administered in the first 8 hours and the remainder over the subsequent 16 hours, for a patient with 14.5% TBSA 6
Burns at 14.5% TBSA in adults represent a borderline indication where clinical assessment is paramount, and consideration should be given to initiating resuscitation if the patient shows signs of hypovolemia, has inhalation injury, or has other comorbidities 5

Monitor for fluid overload, as excessive resuscitation can cause pulmonary, cutaneous, and intestinal edema 7, 6