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Difficulty: HardInitial Stabilization and Triage

A 42-year-old male agricultural worker is brought to the emergency department by his colleagues after collapsing in a pesticide storage facility. On arrival, he is unresponsive to verbal stimuli. He is profusely diaphoretic, vomiting, and incontinent of urine and feces. Blood pressure is 90/50 mm Hg, heart rate is 42/min, and respiratory rate is 28/min. Oxygen saturation is 84% on room air. Examination reveals bilateral pinpoint pupils and generalized muscle fasciculations. The patient has copious, frothy oral secretions and audible wheezing with poor air movement on auscultation.

Arrange the following initial stabilization and management steps in the most appropriate sequential order.

  1. 1Put on fluid-impermeable personal protective equipment
  2. 2Administer rapid intravenous atropine
  3. 3Perform endotracheal intubation
  4. 4Administer intravenous pralidoxime

Answer

The correct sequence of actions is: 1) Put on personal protective equipment, 2) Administer intravenous atropine, 3) Perform endotracheal intubation, and 4) Administer intravenous pralidoxime.
The patient is presenting with a classic cholinergic crisis due to organophosphate poisoning (DUMBELS mnemonic: Diaphoresis, Urination, Miosis, Bradycardia, Emesis, Lacrimation, Salivation). The immediate management of such patients requires a specific deviation from standard trauma/resuscitation algorithms. First, healthcare providers must put on PPE to avoid transdermal toxicity from the patient's contaminated clothing and skin. Second, although the patient requires airway securement, the massive amount of airway secretions (bronchorrhea) and severe bronchoconstriction make immediate endotracheal intubation virtually impossible and highly dangerous. Therefore, large doses of intravenous atropine must be administered rapidly until secretions dry up. Third, once the airway is manageable, endotracheal intubation is performed to support respiration against the nicotinic effects of diaphragmatic weakness. Finally, pralidoxime is given to regenerate the acetylcholinesterase enzyme and reverse the nicotinic blockade.

Step-by-Step Solution

1
Ensure staff safety
Providers don personal protective equipment (PPE).
Organophosphates are rapidly absorbed through the skin. Providers must protect themselves before assessing or treating the contaminated patient.
2
Clear the airway pharmacologically
Intravenous atropine is administered.
The patient's hypoxia is driven by severe bronchorrhea and bronchospasm (muscarinic effects). Atropine dries the secretions and dilates the airways, making ventilation and subsequent intubation physically possible.
3
Secure the airway mechanically
Endotracheal intubation is performed.
Once secretions are minimized, the airway must be definitively secured due to the patient's obtunded state and impending respiratory failure from nicotinic receptor overstimulation (diaphragmatic weakness).
4
Administer definitive antidote
Intravenous pralidoxime is administered.
After the primary ABCs are stabilized, pralidoxime is given to regenerate acetylcholinesterase and reverse the nicotinic symptoms (muscle fasciculations and weakness).

Key Concept

In toxicological emergencies involving organophosphates, provider safety (PPE) is paramount, and pharmacological airway clearance (Atropine) must precede mechanical airway securement (Intubation) due to massive bronchorrhea.
Estimated Time:1m 30s
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Topics

Initial Stabilization and Triage

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