hypothermia /hī′pōthur″mē·ə/ [Gk hypo+ therme, heat] , 1. an abnormal and dangerous condition in which the oral temperature is below 95° F (35° C) or the rectal temperature is below 96° F (35.5° C), usually caused by prolonged exposure to cold or damp conditions. Symptoms include drowsiness, lack of coordination, confusion, and uncontrolled shivering. Respiration is shallow and slow, and the heart rate is faint and slow. The person may appear to be dead. People who are very old or very young; people who have cardiovascular problems; and people who are hungry, tired, or under the influence of alcohol are most susceptible to hypothermia. Hospitalization is necessary for evaluating and treating any metabolic abnormalities that may result from hypothermia. Hypothermic patients in cardiac arrest should be rewarmed to 32° C (92° F) before resuscitation efforts are abandoned. 2. the deliberate and controlled reduction of body temperature with cooling mattresses or ice as preparation for some surgical procedures.
