ICAR-MEDCOM prehospital hypothermia (HT) scale

International Commission for Mountain Emergency Medicine hypothermia scale
Hypothermia (HT) stage	Clinical assessment	Expected core temperature, C° (F°)*
HT I	Clear consciousness with shivering	35-32 (95-89.6)
HT II	Impaired consciousness without shivering	32-28 (89.6-82.4)
HT III	Unconsciousness	28-24 (82.4-75.2)
HT IV	Apparent death	<24-13.7 (<75.2-56.7)^¶
HT V	Death due to irreversible hypothermia	<13.7-9 (56.7-48.2)^¶

* Clinical assessment may be used to stage hypothermia when core temperature measurement in the field is not available, but be aware that clinical findings can vary substantially.
¶ The core temperature at which irreversible hypothermia with death occurs is not well defined. Please refer to UpToDate topics on hypothermia for discussions regarding prehospital declaration of death and withdrawal of resuscitation.

Modified with permission from: Durrer B, Brugger H, Syme D, and the International Commission for Mountain Emergency Medicine. The medical on-site treatment of hypothermia: ICAR-MEDCOM recommendation. High Alt Med Biol 2003; 4:99. Copyright © 2003 Mary Ann Liebert, Inc.

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ICAR-MEDCOM prehospital hypothermia (HT) scale