Snapshot An 87-year-old homeless military veteran is found unconscious in an alleyway in the middle of January. He was wearing a shirt, a sweater, a pair of pants, and a peacoat. He is brought by ambulance to the ED, where vitals are quickly obtained; his blood pressure is 100/50 mmHg, pulse is 50/min, and SaO2 is 92% on RA. Rectal temperature of 87.6°F (30.8°C) is measured. Naloxone was administered enroute by paramedics with no recovery of mental status. The patient is intubated and mechanically ventilated with warm humidifed O2. IV normal saline is infused at room temperature. Initial EKG monitoring reveals sinus bradycardia with no J-point variations or ST-T wave changes. A second EKG is completed and reveals the findings above. The trauma bay temperature is increased to 82°F (27.8°C). The patient's clothing is quickly cut and replaced with a dry blanket Bair Hugger. No evidence of cold injury is observed. Rectal temperature decreases to 85°F (29.4°C). The patient is transferred to the intensive care unit. Introduction Hypothermia is core temperature below 95°F (35°C) login to view 3 more bullets Cold-associated injuries along spectrum login to view 11 more bullets Etiology Pathogenesis login to view 8 more bullets Presentation Predisposing factors to hypothermia login to view 6 more bullets Symptoms and signs based on hypothermia severity login to view 8 more bullets STUDIES Based on major complications of hypothermia, including coagulopathy, acidosis, arrhythmia, and FEN derangements login to view 8 more bullets Radiography login to view 1 more bullet Evaluation and Management Primary and secondary survey with resuscitation login to view 19 more bullets Frostbite-specific management login to view 5 more bullets