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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...
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...
Heating and Cooling Curves02:44

Heating and Cooling Curves

When a substance—isolated from its environment—is subjected to heat changes, corresponding changes in temperature and phase of the substance is observed; this is graphically represented by heating and cooling curves.
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...

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Related Experiment Video

Updated: Jun 18, 2026

A Simple and Inexpensive Method for Determining Cold Sensitivity and Adaptation in Mice
08:35

A Simple and Inexpensive Method for Determining Cold Sensitivity and Adaptation in Mice

Published on: March 17, 2015

The ice-water caloric test.

Angel Batuecas-Caletrio1, Lourdes Montes-Jovellar, Maria Soledad Boleas-Aguirre

  • 1Department of Otorhinolaryngology, Hospital Universitario de Salamanca, University of Salamanca, Spain.

Acta Oto-Laryngologica
|November 20, 2009
PubMed
Summary
This summary is machine-generated.

The ice-water caloric test reveals three common results for vestibular function. Understanding endolymphatic flow and using bedside vestibular exams aid in interpreting these dizziness test findings.

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Last Updated: Jun 18, 2026

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Area of Science:

  • Neurology
  • Otolaryngology
  • Vestibular System Diagnostics

Background:

  • Dizziness is a common symptom requiring accurate diagnosis.
  • The ice-water caloric test is a standard method for assessing vestibular function.
  • Interpreting caloric test results requires understanding vestibular physiology.

Purpose of the Study:

  • To review ice-water caloric test findings in patients with dizziness.
  • To compare ice-water caloric test results with bedside vestibular examination findings.

Main Methods:

  • The ice-water caloric test was performed on patients with indications of unilateral or bilateral vestibular hypofunction.
  • Nystagmus was recorded in supine and prone positions after ice-water irrigation.
  • Bedside vestibular tests, including spontaneous and post-head-shaking nystagmus and head-impulse tests, were analyzed.

Main Results:

  • In 71 patients with unilateral hypofunction, the ice-water test showed a normal response (24), gravity-independent response (31), or no response (14).
  • Bilateral hypofunction was identified in 12 patients.
  • Head-impulse test results correlated with ice-water caloric test findings.

Conclusions:

  • Three primary outcomes are observed with ice-water caloric irrigation.
  • Accurate interpretation necessitates considering vestibular receptor function and endolymphatic flow.
  • Bedside vestibular examination is valuable for clarifying ambiguous caloric test results.