Emergency Medical Minute21 Kesä 2021

Podcast 682: Snake Bites

Contributor: Gretchen Hinson, MD

Educational Pearls:

Pit vipers include cottonmouths, rattlesnakes, and copperheads
- All have folding long fangs, triangular face, and elliptical pupils
About 5,000 snakebites per year reported to Poison Control
Initially develop a local reaction (swelling, bruising, pain, bullae)
Complications can include
25% of snake bites result in no envenomation (dry bites)
20% of bites have serious side-effects, which can include hematologic, cardiovascular, neurologic and, muscular abnormalities, or even anaphylaxis to the envenomation itself
Minor symptoms should be observed for 12-24 hours
Moderate to severe symptoms are typically treated with antivenom
CroFab and other antivenoms are expensive, with costs upwards of $3200 per vial wholesale, though newer agents are cheaper
Treat with 4-6 vials of CroFab initially with moderate symptoms and subsequent redosing with

References

Buchanan JT, Thurman J. Crotalidae Envenomation. [Updated 2021 Jan 29]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2021 Jan.

Kanaan NC, Ray J, Stewart M, et al. Wilderness Medical Society Practice Guidelines for the Treatment of Pitviper Envenomations in the United States and Canada. Wilderness Environ Med. 2015;26(4):472-487. doi:10.1016/j.wem.2015.05.007

Summarized by John Spartz, MS4 | Edited by Erik Verzemnieks, MD

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