Wilderness Medicine Podcast #39: Chemical Heat Blankets & Prolonged Field Care
Sep 12, 2025
In this discussion with Dr. Sigurd Miska, a specialist in mountain medicine and accidental hypothermia, the podcast explores the effectiveness of chemical heat blankets in rescue scenarios. Dr. Miska explains the optimal activation timing and how early pre-activation significantly enhances warmth. They delve into the intricacies of prolonged field care, emphasizing critical planning strategies and the ‘Hitman’ mnemonic for efficient emergency management. Insightful case studies illustrate challenges faced during delayed evacuations, offering practical solutions for severe injuries.
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Snow Cave Sparked A Career
- Dr. Sigurd Miska began mountain medicine research after volunteering in a snow cave experiment during medical school.
- That experience led him to a full-time role with the Mountain Medicine Research Group in Bergen.
How Chemical Heat Blankets Work
- Disposable oxygen-activated blankets use iron powder oxidation to generate heat when exposed to air.
- Their low cost and packability make them common in prehospital and mountain rescue settings.
Start Blankets During Response
- Activate blankets a few minutes before applying rather than waiting until the last second.
- If possible, open or shake them while en route so they reach operating temperature on arrival.