Hyperthermia


Also found in: Dictionary, Thesaurus, Medical, Wikipedia.

hyperthermia

[‚hī·pər′thər·mē·ə]
(physiology)
A condition of elevated body temperature.

Hyperthermia

 

the accumulation of excess heat in the body of humans or animals, with an elevation of body temperature, caused by external factors that hinder the transfer of heat to the external environment or increase heat intake from outside the body. Hyperthermia arises when there is maximum strain on the physiological mechanisms of thermoregulation (perspiration, dilation of cutaneous blood vessels, and so forth); if the causes are not removed, it progresses, ending with heat stroke at a body temperature of approximately 41°-42° C.

Hyperthermia is accompanied by an increase of metabolism and qualitative disturbances of it, loss of water and salts, and disruption of blood circulation and the delivery of oxygen to the brain, causing agitation and sometimes convulsions and fainting. High temperature during hyperthermia is tolerated less readily than it is in other feverish diseases. The development of hyperthermia is promoted by an increase in heat production (for example, during muscular work), disruption of thermoregulation mechanisms (with narcosis, drunkenness, and certain diseases), or age-related failure of these mechanisms (in very young children). Artificial hyperthermia is used in treating certain nervous and slowly progressing chronic diseases.

P. N. VESELKIN

References in periodicals archive ?
There are however, reported occurrences estimated at one in 15,000 anaesthetics in children and one in 20,000 to one in 50,000 anaesthetics in adults (Lee & Wheeler, 1997; Malignant Hyperthermia Association, 2015).
Hyperthermia treatment may be local (tumor only), regional (e.g., a limb), or whole body.
Malignant hyperthermia (MH) maybe considered rare, but it is remarkably lethal if left untreated.
Magnetic hyperthermia heating properties were evaluated using an Ambrell heating station (EasyHeat 0224) at a frequency of 362 kHz and 10.2 kA/m magnetic fields.
The main finding of this study was that hepatic, small intestinal, and renal blood flows under 2.0 and 3.0% sevoflurane anesthesia were maintained during hyperthermia. Although only renal blood flow showed a significant decrease at over 40[degrees] C, the severe high temperature like this may be rarely encountered.
Other differential diagnoses such as malignant hyperthermia and neuroleptic malignant syndrome were ruled out due to normal creatinine kinase level (81 units/L; normal 20-200 units/L) and lack of causative medication.
The present study showed that temperature-controlled laser hyperthermia using the thermal sensor circuit exhibited excellence in maintaining a tar(T).
EM use in hyperthermia treatment however suffers from some discrepancies related to energy penetration and focusing capability in targeting deep-seated tumors.
Besides, 217(58%) cases had normal temperature, 49(13.1%) had hyperthermia, 50(13.4%) had mild hypothermia, and 58(15.5%) had moderate hypothermia.
After the surgical procedure had been completed, Fatmah suddenly developed Malignant Hyperthermia (MH).
Afterwards, we injected these particles intratumorally in mice bearing implanted melanoma cancer to investigate their hyperthermia effect under AMF.

Full browser ?