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Difficulty: HardTrauma and Burns

A 45-year-old female weighing 70 kg is brought to the emergency department after being rescued from a house fire. She sustained deep partial-thickness and full-thickness thermal burns over 40% of her total body surface area (TBSA). The injury occurred approximately 1 hour prior to arrival. Upon initial evaluation, her blood pressure is 110/70 mm Hg, heart rate is 115/min, and oxygen saturation is 96% on room air. She is speaking in a hoarse voice, has singed nasal hair, and carbonaceous sputum is noted. Arrange the following management steps in the correct chronological sequence for this patient's acute and subacute burn care.

  1. 1Perform prompt endotracheal intubation.
  2. 2Calculate the total 24-hour crystalloid volume requirement.
  3. 3Administer one-half of the calculated fluid volume over the next 7 hours.
  4. 4Titrate the ongoing intravenous fluid rate to maintain a target urine output.
  5. 5Initiate colloid infusions (e.g., albumin) as part of maintenance therapy.

Answer

The correct sequence begins with securing the airway via endotracheal intubation, followed by calculating the 24-hour fluid requirement, administering the first half of the fluids over the remaining 7 hours of the first 8-hour post-injury window, titrating ongoing fluids to urine output, and finally initiating colloids after 24 hours.
Acute burn management strictly follows the ATLS ABCs. Airway protection (intubation) is always the first priority when inhalation injury is suspected. Once the airway is secure, circulation is addressed by calculating fluid needs. Crucially, the initial 8-hour resuscitation window begins at the time of injury, requiring the first half of fluids to be given over the remaining 7 hours in this scenario. Subsequent titration is based on urine output. Finally, colloids are withheld until capillary leak resolves at 24 hours.

Step-by-Step Solution

1
Assess and secure the airway.
Endotracheal intubation is performed.
The patient exhibits classic hard signs of inhalation injury (hoarseness, singed hair, carbonaceous sputum), which carries a high risk of imminent airway loss due to rapidly progressive edema.
2
Plan fluid resuscitation for burn shock.
The total 24-hour crystalloid volume is calculated using weight and %TBSA.
Major burns (>20% TBSA) cause massive fluid shifts and third-spacing. Volume requirements must be accurately established to prevent hypovolemic shock.
3
Initiate front-loaded fluid administration.
One-half of the calculated volume is administered over 7 hours.
Capillary permeability peaks immediately after the burn. The first half of the fluid must be given within 8 hours of the time of injury, accounting for transport time.
4
Monitor end-organ perfusion.
Fluid rates are titrated to maintain a urine output of 0.5 mL/kg/hr.
Formulas only provide estimates. Real-time physiological response, specifically urine output, dictates whether the fluid rate needs to be increased or decreased.
5
Transition to subacute fluid management.
Colloid infusions are introduced after 24 hours.
Capillary integrity typically normalizes around 24 hours post-injury, allowing intravascular colloids to effectively increase oncotic pressure without leaking into tissues.

Key Concept

The ATLS sequence for severe thermal burns emphasizes immediate airway protection for inhalation injury, followed by exact, time-dependent fluid resuscitation (calculating from the time of injury, not arrival), and strict avoidance of early colloids.
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Topics

Trauma and Burns

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