Abstract:
Key Points Fever is a homeostatic response under thermoregulation.Hyperthermia, by contrast, is an increase in body temperature from conditions that overwhelm thermoregulation.By consensus, fever is defined as a rectal temperature ≥38°C (100.4°F).The treatment of fever itself is less important than the identification of its cause.Keywords:
Rectal temperature
Rectal temperature
Phentolamine
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Rectal temperature
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No changes were found in the serum levels of corticosterone, pyruvate and lactate in rats during general anaesthesia with thiobutabarbital (Brevinarcon) subjected to short-lasting hyperthermia in a high-temperature chamber (air temperature 50 degrees C, relative humidity 50%) in relation to a control group of rats during similar general anaesthesia at room temperature. However, in the serum of rats during hyperthermia (rectal temperature 40-41 degrees C) the glucose level was about 52% lower and FFA were about 39% lower than in rats kept under normothermic conditions (rectal temperature 36.5-37.5 degrees C) which may point to an increased requirement of tissues for energy-yielding substrates at higher body temperatures and/or increased insulin secretion.
Rectal temperature
Corticosterone
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Rectal temperature
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Hyperthermia is characterized by an increase of body core temperature due to exogenous heat exposure and/or endogenous heat production. Contrary to fever the hypothalamic-controlled temperature set point remains unchanged.To demonstrate that exercise-induced hyperthermia is a common phenomenon in childhood.We describe a 5-year-old boy, who attended our outpatient clinic with a 6-month observation period of exercise-induced hyperthermia with rectal temperatures up to 39.0 degrees C. Characteristically temperature dropped to normal values after cessation of exercise.In eight children aged 5-8, tympanic and rectal temperatures were measured before and after exercise.The rectal temperature increases frequently after exercise (p < 0.001), whereas tympanic temperature did not (p = 0.2).Benign hyperthermia should be considered in children with increased body temperature of unknown sources. The site of temperature measurement might be critical in the identification of this condition.
Rectal temperature
Core temperature
Human body temperature
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Rectal temperature
Mediator
Anterior hypothalamus
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Rectal temperature
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Rectal temperature
Skin Temperature
Mean radiant temperature
Fowl
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Key Points Fever is a homeostatic response under thermoregulation.Hyperthermia, by contrast, is an increase in body temperature from conditions that overwhelm thermoregulation.By consensus, fever is defined as a rectal temperature ≥38°C (100.4°F).The treatment of fever itself is less important than the identification of its cause.
Rectal temperature
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