During a mass casualty incident, the triage nurse evaluates a 54‑year‑old female who sustained third‑degree burns covering 85% of her total body surface area. She is conscious, moaning in pain, and has weak peripheral pulses.

What is the most appropriate triage category for this patient?

Choice A rationale

Dobutamine is a beta-1 adrenergic agonist that increases myocardial contractility and cardiac output. However, in the presence of extreme hypovolemia evidenced by a BP of 80/50 mm Hg and a CO of 2 L/min (normal 4 to 8 L/min), administering an inotrope without volume resuscitation is dangerous. It increases myocardial oxygen demand in a heart that is already struggling due to low perfusion. Volume must be restored before the heart can effectively pump against systemic resistance.

Choice B rationale

Colloids like albumin can expand intravascular volume, but following them with furosemide, a loop diuretic, is counterproductive in a patient with massive blood loss. Furosemide would further deplete the already critically low circulating volume, worsening hypotension and potentially causing irreversible renal failure. Normal hematocrit levels are 42.

Choice C rationale

This patient is in hypovolemic shock. Crystalloids like Normal Saline are essential for immediate volume expansion to support blood pressure. However, because the hematocrit is only 20.

Choice D rationale

Dopamine hydrochloride at high doses acts as a vasopressor to increase blood pressure. Using vasopressors in a severely hypovolemic patient is contraindicated as the primary treatment because it causes profound vasoconstriction in an empty vascular bed, further decreasing tissue perfusion and causing organ ischemia. Like dobutamine, it should only be considered after adequate fluid and blood resuscitation has failed to maintain a mean arterial pressure greater than 65 mm Hg.

Choice A rationale

Decontamination is the priority step for preventing secondary exposure to chemical agents following a terrorist attack. This process involves the physical removal of the hazardous substance from the patient's skin and clothing, typically using water or specialized solutions. By removing the contaminant immediately, healthcare providers prevent the chemical from continuing to be absorbed by the patient and, crucially, prevent the transfer of the toxin to medical staff and other patients within the treatment facility environment.

Choice B rationale

Universal precautions, now often called standard precautions, are designed to prevent the transmission of bloodborne pathogens like HIV or Hepatitis B in a clinical setting. While they involve the use of personal protective equipment, they are not sufficient to manage chemical contaminants. Chemicals require specific hazardous material protocols and specialized filtration masks or suits. Relying solely on standard precautions without performing thorough decontamination would lead to widespread contamination of the emergency department and the surrounding healthcare environment.

Choice C rationale

Triaging is the process of prioritizing patients based on the severity of their injuries to maximize the number of survivors in a mass casualty event. While triaging is essential for overall scene management, it does not directly address the risk of secondary chemical exposure. If triage is performed before decontamination, the triage officers themselves could become victims of the chemical agent through contact with the contaminated victims, thereby reducing the available medical workforce and complicating the rescue.

Choice D rationale

Defusing is a psychological intervention used to support first responders and victims immediately following a traumatic event to reduce acute stress. While it is a vital part of the recovery phase to prevent long-term post-traumatic stress disorder, it has no biological or physical effect on chemical exposure. The physical threat of the chemical agent must be neutralized through decontamination before any psychological debriefing or defusing can safely take place for the affected population or the responders.