Extreme Cold (Hypothermia)

Hypothermia is a medical emergency that occurs when your body loses heat faster than it can produce heat, causing a dangerously low body temperature. Normal body temperature is around 98.6 F (37 C). Hypothermia occurs as your body temperature passes below 95 F (35 C) Pathophysiology : Heat is primarily generated in muscle tissue, including the heart, and in the liver, while it is lost through the skin (90%) and lungs (10%).

Treatment: Be gentle: When you're helping a person with hypothermia, handle him or her gently Move the person out of the cold: Move the person to a warm, dry location if possible Remove wet clothing: If the person is wearing wet clothing, remove it Cover the person with blanket: Use layers of dry blankets or coats to warm the person Monitor breathing: A person with severe hypothermia may appear unconscious, with no apparent signs of a pulse or breathing. 

Research has shown that glomerular filtration rate (GFR) decreases as a result of hypothermia. In essence, Hypothermia increases preglomerular vasoconstriction, thus decreasing both renal blood flow (RBF) and GFR