Treatment of moderate-to-severe hypothermia in an urban setting. STUDY OBJECTIVES: To study the treatment of moderate-to-severe hypothermia using a combination of core rewarming techniques. DESIGN: A prospective study. SETTING: The emergency department of an urban, community hospital. TYPE OF PATIENTS: Sixteen patients who presented with accidental hypothermia with a core temperature of less than 32 C. INTERVENTIONS: All patients were treated with warmed IV fluids either through central or peripheral IV lines and heated aerosol masks. MEASUREMENTS AND MAIN RESULTS: The patients had a mean rewarming rate of 1.16 C/hr; all survived. The majority were chronic alcoholic patients who presented with multiple medical conditions that required hospitalization. CONCLUSION: All patients recovered with this method of core rewarming. 