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Related Concept Videos

Calorimetry01:19

Calorimetry

When objects at different temperatures are placed in contact with each other but isolated from everything else, they attain thermal equilibrium. A container that prevents heat transfer in or out is called a calorimeter, and the use of a calorimeter to make measurements is called calorimetry. Generally, these measurements involve heat or specific heat capacity. The term "calorimetry problem" is used for any problem where the specified objects are thermally isolated from their surroundings. An...
Constant Pressure Calorimetry03:02

Constant Pressure Calorimetry

Calorimetry is a technique used to measure the amount of heat involved in a chemical or physical process or to measure the heat transferred to or from a substance. The heat is exchanged with a calibrated and insulated device called the calorimeter. Calorimetry experiments are based on the assumption that there is no heat exchange between the insulated calorimeter and the external environment. The well-insulated calorimeters prevent the transfer of heat between the calorimeter and its external...
Constant Volume Calorimetry02:41

Constant Volume Calorimetry

Calorimeters are useful to determine the heat released or absorbed by a chemical reaction. Coffee cup calorimeters are designed to operate at constant (atmospheric) pressure and are convenient to measure heat flow (or enthalpy change) accompanying processes that occur in solution at constant pressure. A different type of calorimeter that operates at constant volume, colloquially known as a bomb calorimeter, is used to measure the energy produced by reactions that yield large amounts of heat and...
Energy Balance01:19

Energy Balance

The human body gets energy from the three macronutrients: carbohydrates, proteins, and fats. Energy is released when the chemical bonds in the organic compounds present in the food are broken down. The energy content of food is measured in kilocalories (kcal), defined as the amount of heat required to raise the temperature of one kilogram of water by one degree Celsius. This value is determined by measuring the temperature change of the water surrounding a calorimeter after the complete...
Assessing Body Temperature - Oral01:14

Assessing Body Temperature - Oral

Here are the steps to accurately measure oral temperature using an electronic thermometer:
Step 1:
Start by practicing proper hand hygiene to prevent the spread of microorganisms.
Step 2:
Take the thermometer out of the charging unit, switch it on, and wait for the ready sign.
Step 3:
Gently slide the probe cover until a click is heard. This simple action prevents cross-contamination and ensures the correct placement of the probe cover.
Step 4:
Instruct the patient to open their mouth and place...
Assessing Body Temperature - Rectal01:27

Assessing Body Temperature - Rectal

Rectal temperature measurement is considered the most precise method for assessing core body temperature and typically registers higher than oral temperature. For adults, the rectal thermometer should be inserted 1 to 1.5 inches into the rectum to obtain the most accurate reading.
Follow these steps for rectal temperature assessment:
Step 1: Perform hand hygiene and don clean gloves to prevent cross-infection.
Step 2: Position the patient in a side-lying position to better visualize the rectal...

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Related Experiment Video

Updated: Jul 3, 2026

Using a Combination of Indirect Calorimetry, Infrared Thermography, and Blood Glucose Levels to Measure Brown Adipose Tissue Thermogenesis in Humans
04:54

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Interpretation and use of caloric testing.

Denise Utsch Gonçalves1, Lilian Felipe, Tânia Mara Assis Lima

  • 1Departament of Ophthalmology, Otolaryngology and Speech and Hearing Therapy, University of Minas Gerais Medical School, Brazil. deniseg@medicina.ufmg.br

Brazilian Journal of Otorhinolaryngology
|July 29, 2008
PubMed
Summary

Caloric testing evaluates the vestibular-ocular reflex for each labyrinth. Proper technique is essential for accurate interpretation of results, though reference values may vary.

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Area of Science:

  • Otolaryngology
  • Neuroscience
  • Ophthalmology

Background:

  • Caloric testing is a key otoneurologic evaluation.
  • It assesses the vestibular-ocular reflex, enabling separate labyrinth evaluation.
  • Understanding its use and interpretation is crucial.

Purpose of the Study:

  • To review the main aspects of caloric testing.
  • To synthesize information on its application and interpretation.
  • To provide a comprehensive overview of this diagnostic tool.

Main Methods:

  • A systematic review of literature published over the last century.
  • Inclusion of cross-sectional, longitudinal, original articles, reviews, and meta-analyses.
  • Exclusion of patient chart reviews, case reports, and editorials.

Main Results:

  • 55 relevant articles were selected from 818 abstracts.
  • The selected papers covered caloric testing basics, stimulation types, and result interpretation.
  • Discussion included variables, artifacts, and specific tests like monothermal and ice water caloric tests.

Conclusions:

  • Caloric testing is vital for assessing vestibular function.
  • Attention to technique is paramount for maximizing test sensitivity.
  • Reference values can differ, necessitating local study-based cutoff points.