Frozen Fingers, Time Is Tissue: The Prehospital Approach to Frostbite

This episode of Loud & Clear EMS Guiding Principles dives deep into the prehospital management of frostbite, emphasizing that the most critical principle is doing no harm. Guest Greg Doctor, a wilderness medicine specialist, explains that frostbite is not primarily a freezing injury but a microvascular catastrophe driven by ischemia and a pro-inflammatory cascade, akin to a stroke. The episode stresses that frostbitten tissue is extremely vulnerable—especially during rewarming—and that even minor trauma or freeze-thaw cycles can dramatically increase amputation risk. Providers are advised to avoid active rewarming in the field unless definitive care is more than two hours away and refreezing is unlikely. Instead, passive rewarming via skin-to-skin contact (e.g., axilla or groin) is recommended. The discussion covers physical exam findings, grading systems (Couchy scale), pain management with multimodal analgesia (NSAIDs, acetaminophen, opioids), and the importance of protecting thawed tissue with bulky, dry dressings. The episode also transitions into in-hospital care, highlighting the time-sensitive use of thrombolytics (TPA/TNK within 24 hours) and the newly FDA-approved iloprost, a potent vasodilator with anti-inflammatory and antiplatelet effects that may offer superior outcomes. Key takeaways include prioritizing ABCs and life threats over frostbite, avoiding rubs or constrictive items, and recognizing that tissue viability is not immediately apparent—requiring long-term follow-up and imaging. The episode concludes with a strong emphasis on patient-centered care, pain control, and the evolving landscape of frostbite treatment.