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indirect calorimetry

   Also found in: Dictionary/thesaurus, Encyclopedia, Wikipedia 0.12 sec.
indirect calorimetry,
the measurement of the amount of heat generated in an oxidation reaction by determining the intake or consumption of oxygen or by measuring the amount of carbon dioxide or nitrogen released and translating these quantities into a heat equivalent. Compare direct calorimetry.

calorimetry
measurement of the heat eliminated or stored in any system.

direct calorimetry
measurement of heat actually produced by the organism which is confined in a sealed chamber or calorimeter.
indirect calorimetry
estimation of the heat produced by means of the respiratory differences of oxygen and carbon dioxide in the inspired and expired air.


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For this reason, indirect calorimetry is considered to be the 'gold standard' for assessing energy expenditure in hospitalised patients.
Indirect Calorimetry uses a pain-free breath test to precisely measure an individual's unique metabolic characteristics.
 
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