Which warming measures help prevent hypothermia in the field?

• A. Use only passive warming
• B. Maintain a warm, dry environment and use warmed IV fluids
• C. Use cold IV fluids to promote vasoconstriction
• D. Expose patient to cold air to stimulate circulation

Answer: (B)

Preventing hypothermia in the field comes down to reducing heat loss and adding heat to the body. Keeping the patient in a warm, dry environment cuts down on evaporative and convective heat loss, and dry, insulating clothing helps preserve body heat. Providing warmed IV fluids adds heat directly to the circulating blood, supporting the body's core temperature and helping to stall the progression toward hypothermia. Using cold IV fluids would remove heat and worsen the situation, while exposing the patient to cold air increases heat loss rather than preventing it. Passive warming alone helps, but in real field conditions you want active measures like a warm, dry environment plus warmed fluids to effectively prevent hypothermia.