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Related Concept Videos

Using a Combination of Indirect Calorimetry, Infrared Thermography, and Blood Glucose Levels to Measure Brown Adipose Tissue Thermogenesis in Humans04:54

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Here, we present a protocol to quantify the physiological significance of the impact of brown adipose tissue (BAT) activity on human metabolism. This is achieved by combining carbohydrate loading and indirect calorimetry with measurements of supraclavicular changes in temperature. This novel approach can help develop a pharmacological target for BAT thermogenesis in...
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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...
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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...
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Source: Danielle N. Beatty and Taylor D. Sparks, Department of Materials Science and Engineering, The University of Utah, Salt Lake City, UT
Differential scanning calorimetry (DSC) is an important measurement to characterize thermal properties of materials. DSC is used primarily to calculate the amount of heat stored in a material as it heats up (heat capacity) as well as the heat absorbed or released during chemical reactions or phase changes. However, measurement of this heat can also lead to...
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Indirect Motor Pathways01:22

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The indirect motor or extrapyramidal pathways originate in the brainstem, the lower portion of the brain that connects it to the spinal cord. They consist of several distinct tracts, each with specialized functions. The four main tracts of the indirect motor pathways are the vestibulospinal tract, the reticulospinal tract, the tectospinal tract, and the rubrospinal tract.
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Source: Laboratory of Dr. Terry Tritt — Clemson University
Differential Scanning Calorimetry (DSC) is a method of thermodynamic analysis based on heat-flux method, wherein a sample material (enclosed in a pan) and an empty reference pan are subjected to identical temperature conditions. The energy difference that is required to maintain both the pans at the same temperature, owing to the difference in the heat capacities of the sample and the reference pan, is recorded as a function of...
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Related Experiment Video

Updated: Jan 20, 2026

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

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Indirect Calorimetry in Clinical Practice.

Marta Delsoglio1, Najate Achamrah2, Mette M Berger3

  • 1Clinical Nutrition, Geneva University Hospital (HUG), 1205 Geneva, Switzerland. Marta.DELSOGLIO@hcuge.ch.

Journal of Clinical Medicine
|September 8, 2019
PubMed
Summary
This summary is machine-generated.

Indirect calorimetry (IC) measures gas exchange to determine energy expenditure, guiding personalized nutrition therapy. Recent advancements enhance its clinical application for improved patient outcomes.

Keywords:
indirect calorimeterindirect calorimetrynutrition therapyresting energy expenditure

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Area of Science:

  • Clinical Nutrition
  • Metabolic Monitoring
  • Critical Care Medicine

Background:

  • Indirect calorimetry (IC) is the gold standard for measuring energy expenditure via pulmonary gas exchange.
  • It is a non-invasive method crucial for tailoring nutrition support to individual metabolic requirements.
  • Optimizing nutrition therapy can lead to better clinical outcomes.

Purpose of the Study:

  • To review recent innovations in indirect calorimetry.
  • To summarize current clinical indications, benefits, and limitations of IC.
  • To advocate for broader implementation of IC in routine clinical practice.

Main Methods:

  • This review synthesizes information on recent technological advancements in IC.
  • It examines the application of IC in both spontaneously breathing and mechanically ventilated patients.
  • The review discusses the cost-benefit analysis of integrating IC into standard care.

Main Results:

  • Modern IC devices offer accurate and user-friendly measurements.
  • IC enables precise personalization of nutrition support, improving patient management.
  • Despite benefits, barriers to routine implementation and cost-effectiveness require consideration.

Conclusions:

  • Indirect calorimetry is essential for optimizing energy expenditure assessment and nutrition therapy.
  • Technological progress has made IC more accessible for diverse patient populations.
  • Promoting IC implementation can enhance cost-effectiveness and clinical results in nutrition support.