Thermoregulation of the newborn.

The classic modes of heat loss affecting the newborn are conduction, convection, radiation and evaporation. The disproportionate ratio of surface area to body weight (SA/BW) of the premature infant is the basis of inefficient heat conservation, combined with a blunted metabolic response. Hypothermia leads to hypoxemia, acidosis, hypoglycemia, kernicterus and other lethal complications. Mistakes are common. Attention to minute details is required for stabilization of body temperature at the "neutral temperature zone" in delivery room, nursery and in transport.