Chlorine Release at a Pool Maintenance Room
At 09:30, you are sent to a private villa pool maintenance room where a worker mixed hydrochloric acid with sodium hypochlorite. On arrival, a yellow-green haze is visible at the doorway, and a strong chlorine odor is present. Three patients are reported: one man is collapsed inside the storage room and unresponsive; a second man is sitting at the doorway, coughing violently and drooling; a third man is outside, anxious, with burning eyes and no respiratory distress. Bystanders are about to run in to pull the collapsed worker out. You have a crew of two, Level C chemical suits with full-face respirators, a bag-valve mask with a high-efficiency filter, oxygen, and naloxone. Fire and HazMat are 12 minutes away. Wind is blowing toward the villa's main entrance.
1. What are your scene-safety and initial actions?
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Do not enter the storage room. This is an active chemical release with a visible gas cloud and an unconscious patient inside; untrained rescuers would become additional victims. Park upwind and uphill, establish hot, warm, and cold zones, and stop bystanders from entering. Send only responders in appropriate PPE with SCBA or supplied air; Level C with a full-face respirator may be inadequate for an unknown concentration, so wait for HazMat if the atmosphere is not monitored. Request fire, HazMat, and additional ALS units. Remove ambulatory patients to the cold zone, begin decontamination with copious water, and avoid contaminated runoff. Do not use a pocket mask near the source; use a BVM with a filter. Notify the receiving hospital of a chlorine exposure with multiple patients.
2. How would you triage and treat the three patients?
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Triage by exposure and physiology. The collapsed worker inside is immediate: expect severe bronchospasm, pulmonary edema, hypoxemia, and possible cardiac arrest; remove only with PPE, decontaminate, give 100% oxygen, assist ventilation, and give salbutamol by nebulizer if bronchospasm is present. The doorway patient with violent coughing and drooling is urgent: sit upright, give high-flow oxygen and nebulized salbutamol, and prepare for airway edema; drooling suggests upper airway irritation and possible obstruction. The anxious man outside with eye burning is delayed or minor: irrigate the eyes for at least 15 minutes, remove clothing, wash skin, and observe for delayed pulmonary edema. Do not give naloxone routinely; the collapse is toxic inhalational, not opioid. Reassess all patients for stridor, wheeze, or falling SpO2.
3. What documentation and responder-safety follow-up is required?
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Document the time of arrival, wind direction, visible plume, zones, PPE level, and who entered. Record each patient's exposure duration, location inside, at the doorway, or outside, decontamination time, vital signs, oxygen, and medications. Report any responder exposure or equipment breach to the safety officer and complete an exposure report. Because chlorine can cause delayed pulmonary edema, advise all patients to return for worsening dyspnea and document that advice. Keep contaminated clothing and equipment out of the ambulance cab; bag them and decontaminate the stretcher before reuse.