indirect calorimetry


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calorimetry

 [kal″o-rim´ĕ-tre]
measurement of the heat eliminated or stored in any system.
direct calorimetry measurement of the amount of heat produced by a subject enclosed within a small chamber.
indirect calorimetry measurement of the amount of heat produced by a subject by determination of the amount of oxygen consumed and the amount of carbon dioxide eliminated.

in·di·rect cal·o·rim·e·try

determination of heat production of an oxidation reaction by measuring uptake of oxygen and/or liberation of carbon dioxide and nitrogen excretion and then calculating the amount of heat produced.

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.

in·di·rect ca·lor·i·me·try

(in'di-rekt' kal'ŏr-im'ĕ-trē)
Determination of heat production of an oxidation reaction by measuring uptake of oxygen or liberation of carbon dioxide and nitrogen excretion.

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.
References in periodicals archive ?
The relationship between the logarithm of heat production (HP) and metabolizable energy intake (MEI) of broilers in the indirect calorimetry method.
Validation of a new mixing chamber system for breath-by-breath indirect calorimetry.
The study estimated that when indirect calorimetry is not available, increasing nutritional intake by 27% over energy needs as predicted by HBE would adjust for the surgical stress factor and malnutrition in patients with chronic liver disease awaiting transplant.
4) The energy expenditure can then be estimated in a similar way to that in indirect calorimetry.
Resting energy expenditure (REE) was measured using indirect calorimetry in 22 healthy adults (20 females and 2 males) and compared to predicted REE using the Harris Benedict equation.
With the aid of indirect calorimetry, Agricultural Research Service studies help fine tune the digestibility of feedstuffs so cattle can exploit more of the energy in feeds.
Only one study has previously applied indirect calorimetry to the assessment of resting energy expenditure in elderly mental patients.
Contract notice: The test animals are indirect calorimetry system and environmental chambers purchase.
The retained energy can be measured with the comparative slaughter (CS) technique or by measuring the carbon-N balance and the metabolic processes responsible for the energy supply to the body can be determined by measuring the HP of the animal which can be determined by direct or indirect calorimetry (IC) by measuring the gas exchange from the animal.
15) reported that there is no statistically significant difference between the energy expenditure obtained by HR and the energy expended by indirect calorimetry.
Therefore, the aim of this study is to perform a criterion validity assessment of the MWK versus indirect calorimetry during walking and light running.
During the intervention periods, blood samples were collected every 10 min, and energy expenditure was assessed by using indirect calorimetry.