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Related Concept Videos

Body Temperature01:25

Body Temperature

4.4K
The body's temperature, measured in degrees, is determined by the balance between heat production and dissipation to the surrounding environment. For instance, if exercising vigorously, the body will produce more heat, causing sweat and dissipating that heat. Despite extreme environmental conditions and physical exertion, the human temperature-control system maintains a constant core body temperature (the temperature of deep tissues, which are the tissues located beneath the skin and other...
4.4K
Body Temperature01:07

Body Temperature

1.4K
Body temperature reflects the equilibrium between heat production and heat loss within the body. Most heat is generated by metabolically active tissues, particularly the liver, heart, brain, kidneys, and endocrine organs. At rest, skeletal muscles contribute 20–30% of total heat production, but during vigorous exercise, this can increase up to 30–40 times.
The average body temperature is approximately 37°C (98.6°F) and typically ranges from 36.1–37.2°C...
1.4K
Factors Affecting Body Temperature01:28

Factors Affecting Body Temperature

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As a nurse, it is vital to understand the factors affecting body temperature to monitor variations and effectively evaluate deviations from regular.
Factors may  include:
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Increased Body Temperature01:25

Increased Body Temperature

7.5K
A body temperature above  38°C  (100.4 °F) is known as fever or pyrexia, and a person with fever is termed 'febrile.' Typically, the hypothalamus, a part of the brain that acts as the body's thermostat, regulates body temperature through a thermoregulatory setpoint. It receives signals from cold and warm thermal receptors throughout the body and adjusts the body's temperature accordingly. Fever occurs when this hypothalamic setpoint is altered, usually in...
7.5K
Decreased Body Temperature01:29

Decreased Body Temperature

1.1K
A decreased body temperature can occur in patients with hypothermia and frostbite. Heat loss with extended cold exposure overpowers the body's ability to create heat, resulting in hypothermia. Core temperature readings help classify hypothermia. Mild hypothermia is temperatures between 32 °C (89.6 °F) and 35°C (95 °F) and is caused by impaired thermoregulation. Moderate hypothermia is temperatures between 28 C (82.4 °F) and 32 °C (89.6 °F) caused by...
1.1K
Equipments Used to Measure Body Temperature01:13

Equipments Used to Measure Body Temperature

1.8K
Body temperature can be assessed using various devices and measured in Celsius or Fahrenheit.
Glass-bulb Thermometer:
Glass-bulb thermometers are hollow glass tubes with a bulb tip containing liquid such as ethanol or mercury. Historically, glass bulb mercury thermometers were the standard device to measure body temperature. Today, mercury thermometers are prohibited in many countries due to the hazardous effects of mercury and the risk of exposure if the glass bulb breaks. In general,...
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Related Experiment Video

Updated: Feb 2, 2026

Mouse Body Temperature Measurement Using Infrared Thermometer During Passive Systemic Anaphylaxis and Food Allergy Evaluation
04:34

Mouse Body Temperature Measurement Using Infrared Thermometer During Passive Systemic Anaphylaxis and Food Allergy Evaluation

Published on: September 14, 2018

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Body temperature regulation and anesthesia.

Rainer Lenhardt1

  • 1Department of Anesthesiology, University of Louisville, Louisville, KY, United States.

Handbook of Clinical Neurology
|November 22, 2018
PubMed
Summary
This summary is machine-generated.

General anesthesia impairs the body's temperature control, widening the range between sweating and vasoconstriction thresholds. This often leads to inadvertent hypothermia during medical procedures.

Keywords:
anestheticsgeneral anesthesiainadvertent hypothermiainterthreshold rangeneuraxial anesthesiaperioperative fevershivering thresholdsweating thresholdvasoconstriction threshold

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Area of Science:

  • Anesthesiology
  • Physiology

Background:

  • General anesthesia induces unconsciousness and eliminates pain via inhaled gases and intravenous drugs.
  • Anesthetic medications disrupt behavioral and autonomic thermoregulatory responses to environmental changes.

Purpose of the Study:

  • To investigate the effects of general anesthesia on thermoregulatory control.
  • To understand how anesthetics alter temperature thresholds and ranges.
  • To examine the impact on inadvertent hypothermia and fever management.

Main Methods:

  • Review of physiological responses to general anesthesia.
  • Analysis of dose-dependent effects of anesthetics on thermoregulatory thresholds.
  • Observation of changes in vasoconstriction and sweating thresholds.

Main Results:

  • Anesthetics inhibit thermoregulation in a dose-dependent manner.
  • The vasoconstriction threshold is affected approximately three times more than the sweating threshold.
  • General anesthesia widens the interthreshold range, increasing the risk of inadvertent hypothermia.
  • Anesthesia reduces fever magnitude in febrile patients.

Conclusions:

  • General anesthesia significantly impairs thermoregulatory control.
  • Dose-dependent alterations in temperature thresholds lead to inadvertent hypothermia.
  • Understanding these effects is crucial for perioperative temperature management.