- —hypothermic, adj./huy'peuh therr"mee euh/, n.1. Pathol. subnormal body temperature.2. Med. the artificial reduction of body temperature to slow metabolic processes, as for facilitating heart surgery.[1885-90; HYPO- + THERM- + -IA]
* * *Abnormally low body temperature, with slowing of physiological activity.It is artificially induced (usually with ice baths) for certain surgical procedures and cancer treatments. Accidental hypothermia can result from falling into cold water or overexposure in cold weather. Underlying conditions such as cerebrovascular disease or intoxication increase the risk from exposure. Hypothermia is serious when body temperature is below 95 °F (35 °C) and an emergency below 90 °F (32.2 °C), at which point shivering stops. Pulse, respiration, and blood pressure are depressed. Even when the victim appears dead, revival may be possible with very gradual passive rewarming (e.g., with blankets). See also frostbite.
* * *abnormally low body temperature in a warm-blooded creature, associated with a general slowing of physiologic activity. Hibernating (hibernation) animals allow their body temperatures to fall to levels only slightly above ambient temperature, in a unique kind of hypothermia from which they can recover rapidly when necessary; similar temperatures would be fatal to nonhibernators.In human beings, hypothermia may be artificially induced to decrease the metabolic need for oxygen during certain surgical procedures and for the control of some kinds of cancer. The lowering of body temperature in these cases is usually accomplished through the use of ice baths. Similarly induced hypothermia is employed to inhibit metabolic process in organs removed for transplantation, thus prolonging their viability.Controlled induction of hypothermia has many important medical applications. For example, regional cooling of the heart during coronary artery bypass surgery protects the heart muscle while the revascularization procedure is completed. Profound systemic hypothermia with circulatory arrest is possible by utilizing heat exchange or cooling circuits in modern cardiopulmonary bypass devices. The technique of profound hypothermia allows protection of the brain, heart, and other vital organs when circulation is stopped during the time of circulatory arrest, which may be an hour or longer. Complex aortic aneurysms involving the proximal portion of the aorta (the trunk of the aorta, originating from the heart) and complex congenital defects of the heart can be safely corrected with this technique.Accidental hypothermia may be life-threatening and constitutes a medical emergency. Low environmental temperature alone may be sufficient to cause hypothermia, as from submersion in icy water or overexposure in heavy winter snows. In cases of hypothermia due to exposure, there is often an underlying condition—such as cerebrovascular disease, hypothyroidism, severe infection, or alcohol or drug intoxication—that predisposes to the drop in body temperature. Hypothermia is serious at body temperatures below 35° C (95° F); below 32.2° C (90° F), the point at which the normal shivering reaction ceases, the condition warrants emergency treatment. Because of the physiologic slowing, pulse, respiration, and blood pressure are depressed; in some cases the victim of hypothermia appears to be dead, although revival may still be possible with appropriate treatment.Accidental hypothermia is treated by a slow, gradual rewarming of the victim, using blankets and other passive means rather than direct application of heat. The increase in body temperature must not exceed one or two degrees F per hour, as more rapid rewarming can cause the cardiovascular system to collapse.
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hypothermia — 1877, Modern Latin, from hypo under (see HYPO (Cf. hypo )) + Gk. therme heat (see THERMAL (Cf. thermal)) … Etymology dictionary
hypothermia — ► NOUN ▪ the condition of having an abnormally low body temperature. ORIGIN from Greek therm heat … English terms dictionary
hypothermia — [hī΄pōthʉr′mē ə, hī΄pəthʉr′mē ə] n. [ModL < HYPO + Gr thermē, heat: see WARM] a subnormal body temperature … English World dictionary
Hypothermia — This article is about the adverse condition of Hypothermia. For deliberately induced cooling, see Therapeutic hypothermia. For the 2010 horror film, see Hypothermia (film). Hypothermia Classification and external resources During Napoleon… … Wikipedia
Hypothermia — Abnormally low body temperature. The condition needs treatment at body temperatures of 35C (95 F) or below. And hypothermia becomes life threatening below body temperatures of 32.2 C (90 F). The signs and symptoms of hypothermia depend upon the… … Medical dictionary
hypothermia — [[t]ha͟ɪpoʊθɜ͟ː(r)miə[/t]] N UNCOUNT If someone has hypothermia, their body temperature has become dangerously low as a result of being in severe cold for a long time. [MEDICAL] Syn: exposure … English dictionary
hypothermia — hipotermija statusas T sritis Kūno kultūra ir sportas apibrėžtis Sumažėjusi kūno temperatūra. Hipotermija pasireiškia, kai organizmas gamina normalią temperatūrą, bet jį šaldo sumažėjusi aplinkos temperatūra, sustiprėjęs vėjas, padidėjęs… … Sporto terminų žodynas
hypothermia — noun Etymology: New Latin Date: circa 1886 subnormal temperature of the body • hypothermic adjective … New Collegiate Dictionary
hypothermia — noun abnormally low body temperature; specifically, below 35°C Ant: hyperthermia See Also: frostbite … Wiktionary
hypothermia — hy|po|ther|mi|a [ˌhaıpəuˈθə:miə US pouˈθə:r ] n [U] [Date: 1800 1900; : Modern Latin; Origin: hypo + Greek therme heat ] a serious medical condition caused by extreme cold … Dictionary of contemporary English