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EM VivasToxicology and environmental emergencies

EM Vivas · Toxicology and environmental emergencies

Stingray injury — the data viva

A clinical data-viva on stingray envenomation — thermolabile venom, hot-water immersion and wound exploration.

clinical1 min readSource-verified ·

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Target exams

ACEMFRCEMABEM
Prompt
A 34-year-old man stepped on a stingray in shallow water and presents with an excruciatingly painful puncture wound to the lateral ankle. Discuss the immediate first aid, wound management, and the principles of care.

Interpretation

Reveal interpretationShowHide

First aid — hot-water immersion: Stingray venom most often causes severe pain on contact. In a 119-case ED series, 88% treated with hot-water immersion alone had complete relief within 30 minutes without other analgesic, with no thermal burns; those given one analgesic dose plus immersion needed no second dose. A scoping review finds general consensus for hot-water immersion or ice-pack treatment across marine envenomations — but no universally superior treatment.[1][2]

Wound management:

  1. After immersion, explore every wound for the retained stinger, integumentary sheath, or barb — the stinger and sheath can embed in soft tissue; although barbs can be radio-opaque, radiography failed to detect barbs in the series, so explore regardless of the X-ray.
  2. Irrigate copiously with saline; debride devitalised tissue.[1]

Antibiotics: high bacterial contamination in these puncture wounds — significant wound infections returned to the ED when prophylaxis was omitted — so standard antibiotic prophylaxis may be prudent.[1]

Tetanus: A stingray puncture is tetanus-prone — assess and give a booster or immunoglobulin as indicated.[3]

Principles: thermolabile venom — hot water first; explore for the retained barb; do not close; antibiotics for deep or contaminated wounds; tetanus.[1][3]

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References3ShowHide
  1. [1]Clark RF, Girard RH, Rao D, et al. Stingray envenomation: a retrospective review of clinical presentation and treatment in 119 cases. The Journal of Emergency Medicine, 2007.PMID 17630073
  2. [2]Niżnik Ł, Jabłońska K, Orczyk M, et al. Hot-water immersion (HWI) or ice-pack treatment (IPT) as first aid for human envenomations — a scoping review. Toxins, 2024.PMID 38922167
  3. [3]Cooke MW. Are current UK tetanus prophylaxis procedures for wound management optimal? Emergency Medicine Journal, 2009.PMID 19934122
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