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Related Concept Videos

Decreased Body Temperature01:29

Decreased Body Temperature

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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...
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Methods of reducing fever01:22

Methods of reducing fever

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The signs and symptoms of fever include hot and dry skin, flushed face, thirst, muscle aches, anorexia, headache, tachycardia, tachypnea, and fatigue. Elevated body temperature is reduced using two methods: pharmacological and nonpharmacological. Proper identification and treatment of the root cause of a fever is of utmost importance.
Pharmacological Methods of Reducing Fever:
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Temperature Measurement Sites01:14

Temperature Measurement Sites

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A thermometer measures body temperature. The common sites for measuring body temperature are the oral cavity, axillary region, temporal artery, and skin surface, such as the forehead, abdomen, and axilla. True core body temperature is assessed in the rectum, tympanic membrane, pulmonary artery, esophagus, and urinary bladder.
Oral: When assessing oral temperature, the thermometer tip should be placed under the tongue in the posterior sublingual pocket. It offers accurate readings and can be...
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Related Experiment Video

Updated: Jan 4, 2026

Short-Duration Hypothermia Induction in Rats using Models for Studies examining Clinical Relevance and Mechanisms
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Induction techniques that reduce redistribution hypothermia: a prospective, randomized, controlled, single blind

Jonathan V Roth1,2,3, Leonard E Braitman4, Lacy H Hunt4

  • 1Department of Anesthesiology, Albert Einstein Medical Center, 5501 Old York Road, Philadelphia, PA, USA. jvroth1@aol.com.

BMC Anesthesiology
|November 8, 2019
PubMed
Summary
This summary is machine-generated.

Preventing redistribution hypothermia is crucial. Inhalation anesthetic inductions with sevoflurane or phenylephrine before propofol significantly reduced hypothermia in patients aged 18-55.

Keywords:
Anesthesia inductionHypothermiaInhalation anesthesia inductionInhalation inductionIntraoperative hypothermiaIntravenous anesthesia inductionIntravenous inductionPerioperative hypothermiaPostoperative hypothermiaRedistribution hypothermia

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Area of Science:

  • Anesthesiology
  • Patient Safety
  • Thermoregulation

Background:

  • Intraoperative hypothermia correction receives more focus than prevention.
  • Redistribution hypothermia, a significant concern, requires effective preventative strategies.

Purpose of the Study:

  • To compare anesthetic induction techniques for their efficacy in preventing redistribution hypothermia.
  • To evaluate sevoflurane inhalation and phenylephrine pretreatment for hypothermia reduction.

Main Methods:

  • Randomized trial involving 200 adult patients (18-55 years) undergoing elective procedures.
  • Four induction groups: sevoflurane/oxygen, sevoflurane/oxygen/nitrous oxide, propofol, and phenylephrine/propofol.
  • Core temperatures monitored every 15 minutes for 1 hour post-induction; forced air warming utilized.

Main Results:

  • Inhalation inductions (sevoflurane) and phenylephrine/propofol resulted in significantly higher mean temperatures (0.39-0.54°C) compared to propofol alone (p < 0.001).
  • Hypothermia (temperature < 36.0°C) occurred in 16% of patients in the intervention groups versus 60% in the propofol-only group (p < 0.0001).

Conclusions:

  • Inhalation inductions with sevoflurane or phenylephrine pretreatment effectively reduce redistribution hypothermia.
  • These methods offer a practical approach to improve patient temperature management during anesthesia.