Concentrated Acid Spill with a Cut Finger in a District Laboratory
At 10:15 am in the clinical laboratory of a 200-bed district hospital, a 22-year-old trainee drops a 500 mL glass bottle of concentrated hydrochloric acid beside the sink. The bottle shatters, about 200 mL spreads across the tiled floor, and droplets splash her left forearm. She also has a 1 cm cut on her right index finger from a glass fragment; the cut is bleeding slightly. She is wearing a lab coat, nitrile gloves and goggles. A patient's relative is seated 3 m away for blood collection, and two other technicians are at the bench. The room has one eyewash station 8 m down the corridor, a chemical spill kit marked 'acid neutraliser' that expired six months ago, a plastic bucket, paper towels and a wall-mounted extractor fan that is switched off. The door opens inward. There is no fume hood. The laboratory safety manual is locked in the supervisor's office, and the supervisor is away until noon.
1. What should be done in the first two minutes for the trainee, the patient's relative and the room? Prioritise your actions and explain why.
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First priority is people, not the spill.
- Stop and alert. Tell the trainee to stop moving and avoid touching the spill with gloved hands; call for help. Ask the patient's relative to leave the room calmly by the nearest safe route and wait outside. Keep other staff at the doorway so no one walks through the acid.
- Trainee decontamination. Remove the contaminated lab coat and gloves without pulling acid over the skin. Flush the left forearm under cool running water for at least 15 minutes; do not rub or apply a neutraliser to skin, because neutralisation can generate heat and worsen injury. For the cut, irrigate with water, inspect for glass, control bleeding with clean gauze and cover. Refer for wound assessment and tetanus review.
- Do not switch on the extractor fan yet. A fan can spread acid mist before the spill is contained; ventilate after containment. Keep the door closed to contain vapours, but do not lock people in.
- Protect the spill area. Do not use paper towels to wipe concentrated acid; use inert absorbent from the spill kit or fresh sodium bicarbonate, working from the outside inward. Pick up glass with forceps or a dustpan, never hands.
- Document the time of exposure and first aid. If the trainee has eye exposure, use the eyewash for 15 minutes and arrange urgent medical review even though goggles were worn.
2. The only spill kit is expired. How should you contain and clean the spill, and what must you not do?
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The expired kit is a supply problem, not a reason to leave the spill. Put on appropriate PPE: goggles plus face shield, fluid-resistant apron, boots and nitrile or neoprene gloves. Inspect the kit: if the neutraliser is caked, discoloured or contaminated, do not rely on it. Use fresh sodium bicarbonate or soda ash if available, applied cautiously from the outer edge of the spill, or use inert absorbent to soak up the acid. Work from outside inward, then place the absorbed material and broken glass in a labelled chemical-waste container. Pick glass up separately and place it in a sharps container. After removal, clean the floor with water and detergent, then check the surface with pH paper; repeat if still acidic.
Do not hose the spill into a drain, use a domestic mop that will spread acid, vacuum the material, mix the acid with a strong base such as sodium hydroxide, or use paper towels as the only absorbent. Do not let the patient's relative or uninvolved staff remain in the room. If the spill were larger or the liquid unknown, evacuate and call the safety officer rather than attempt cleanup. Record that the kit was expired and replace it the same day.
3. What documentation and follow-up are required after the incident, and how would you prevent recurrence?
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Complete an incident report within 24 hours. Include the time, acid concentration and approximate volume, people exposed, first aid given, spill cleanup method, pH verification, waste disposal route and whether the spill kit was expired. Send the trainee to occupational health or emergency for wound review and tetanus assessment; document the outcome. Inform the laboratory safety officer and hospital infection-control or safety committee.
Preventive actions: replace the spill kit and check all kits monthly for expiry; store concentrated acids in secondary containment and carry bottles in a carrier, not by the neck; keep acids away from the sink edge; provide a wall-mounted eyewash within 10 seconds' travel; train staff in spill drills; keep the safety manual accessible; and review the risk assessment. A corrective-action record should name the responsible person and completion date. The aim is not blame but a system fix: an expired kit and an inaccessible manual are latent failures that turned a small spill into a larger risk.