SUMMARYBody temperature below 35ºC is defined as hypothermia. It is classified as mild, moderate and severe. While the standard thermometers can not measure the core temperature below 35ºC, thermometers with intravezical, rectal or esophageal probes must be used to determine the core temperature in hypothermic patients. Although hypothermia is seen in cold climates; it can be seen because of environmental conditions, like drowning, too. Also inadequate clothing and hypothermia background can facilitate hypothermia in patients. The common causes for hypothermia are dermatological disease, drug adverse effects, iatrogenic causes, neurological disease, neuromuscular insufficiency, sepsis and metabolic condition of the patient. Resistance to cold in the peoples is not well developed while they are warm-blooded. Especially homeless, psychiatric and lonely elderly people can be affected by hypothermia easily. Although the main heat loss of the body is by radiation; conduction, convection and evaporation take place too. Coordination and consciousness deficiencies are the main symptoms. Nevertheless clinical signs vary according to the hypothermia state. The basic treatment principles resemble each other in mild, moderate and severe hypothermia. These are; reducing of the heat loss, warming of the body with internal and external ways, supplying the main energy and fluid demands for patient metabolism. The defibrillation techniques, resuscitation time and the drugs which are used are different in hypothermic cardiopulmonary resuscitation than normal cardiopulmonary resuscitation. The main systems which are damaged from hypothermia are cardiovascular and central nervous system. That's why early and true diagnosis and aggressive treatment has a great importance for surviving. ÖZETHipotermi vücut merkez s›cakl›¤›n›n 35ºC 'nin alt›na düflmesi olarak tan›mlan›r. Hafif, orta ve a¤›r olmak üzere üç ayr› kategoride s›n›fland›r›l›r. Standart termometreler 35ºC'nin alt›n› ölçemediklerinden; vücut merkez ›s›s› (iç ›s›), rektal, intravezikal veya özefagus probu olan termometrelerle ölçülür. Hipotermi s›kl›kla so¤uk iklimlerde görülse de bo¤ulma gibi çevresel etmenlere ba¤l› da geliflebilir. Ayr›ca yetersiz giyinme ve daha önceden hipotermi öyküsünün bulunmas› kolaylaflt›r›c› etmenlerdir. Hipoterminin s›k nedenleri aras›nda cilt hastal›klar›, ilaç yan etkileri, iyatrojenik nedenler, metabolik durumlar, nörolojik hastal›klar, nöromuskuler yetersizlik ve sepsis vard›r. ‹nsanlar s›cak iklime uygun canl›lar oldu¤undan hipotermiye dayan›kl›l›klar› geliflmemifltir. Özellikle evsizler, kimsesiz yafll›lar ve ak›l hastalar› hipotermiye ba¤l› zararlanmalara kolayl›kla u¤rayabilirler. Vücuttan ›s› kayb› en fazla radyasyon yoluyla olmak üzere, kondüksiyon, konveksiyon ve evaporasyonla da olmaktad›r. Hipotermik hastalarda özellikle bilinç ve koordinasyon bozukluklar› temel semptomlard›r. Bununla beraber klinik bulgular hipoterminin evresine göre de¤iflkendir. Hafif, orta ve a¤›r düzeydeki hastalar›n tedavi ilkeleri benzerlik gösterir. Bunlar vücu...