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Targeted temperature management (TTM), previously known as therapeutic hypothermia or protective hypothermia, is an active treatment that tries to achieve and maintain a specific body temperature in a person for a specific duration of time in an effort to improve health outcomes during recovery after a period of stopped blood flow to the brain. [1]
Controlled rewarming has been cited in the literature as beneficial in preventing reperfusion injury. A complaint levied against the Arctic Sun is the risk of skin injury. A study published in 2007 found that the Arctic Sun caused "skin erythema during the cooling period... in almost all patients," but that no pressure ulcers or frostbite was ...
Hypothermia appears to have multiple effects at a cellular level following cerebral injury. Hypothermia reduces vasogenic oedema, haemorrhage and neutrophil infiltration after trauma. [31] The release of excitatory neurotransmitters is reduced, limiting intracellular calcium accumulation.
Choice of rewarming method depends on the suspected extent of skin injury and severity of hypothermia (if present). [11] Passive rewarming techniques such as blankets may be sufficient for milder injuries. [11] Active rewarming techniques such as warm intravenous fluids or warm water baths may be needed for more severe injuries.
Hypothermia is a low core body temperature, defined clinically as a temperature of less than 35 degrees Celsius (95 degrees Fahrenheit). The patient is re-warmed either by using a cardiac bypass or by irrigation of the body cavities (such as thorax, peritoneum, bladder) with warm fluids; or warmed IV fluids.
A hypothermia cap (also referred to as cold cap or cooling cap) is a therapeutic device used to cool the human scalp. Its most prominent medical applications are in preventing or reducing alopecia in chemotherapy , and for preventing cerebral palsy in babies born with neonatal encephalopathy caused by hypoxic-ischemic encephalopathy (HIE) .
Afterdrop is a continued cooling of core temperature during the initial stages of rewarming from hypothermia.. Afterdrop is attributed to the return of cold blood from extremities to the core due to peripheral vasodilatation, thus causing a further decrease of deep body temperature. [1]
While moderate hypothermia may be satisfactory for short surgeries, deep hypothermia (20 °C to 25 °C) affords protection for times of 30 to 40 minutes at the bottom of this temperature range. Profound hypothermia (< 14 °C) usually isn't used clinically. It is a subject of research in animals and human clinical trials.