indirect calorimetry


Also found in: Dictionary, Thesaurus, Encyclopedia.

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.

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.
References in periodicals archive ?
Net energy of hemp hulls and processed hemp hull products fed to growing pigs and the comparison of net energy determined via indirect calorimetry and calculated from prediction equations.
Prior studies have pointed limitations in regards to the use of RER obtained by open-circuit indirect calorimetry to calculate EE in rodents.
Following a 5-min warm-up at 50 Watts on the cycle ergometer, each subject was again fitted for indirect calorimetry, ECG, and NIRS (Niro-200NX, Hamamatsu Photonics, Hamamatsu City, Japan).
Resting EE, V[O.sub.2], Ve, RF, and Fe[O.sub.2] were collected for 30 minutes via continuous indirect calorimetry (FitMate Pro, Cosmed, Roma, Italy) with the subjects in total rest and in a reclined position in a standardized and quiet room (Compher et al., 2006).
Energy expenditure was measured using indirect calorimetry and a portable metabolic cart.
All participants visited the laboratory for assessment of RMR using indirect calorimetry and body composition and bone density using DEXA (GE Lunar Prodigy; GE Healthcare, Madison, WI).
Energy expenditure of postmenopausal women was measured using an indirect calorimetry during resting, sitting, standing and walking at speeds of 50 m/min and 70 m/min.
The purpose of the weight reduction initiative was to determine if metabolic testing, or indirect calorimetry, combined with a 4-week dietary intervention would result in decreased body weight within a selected cohort of Soldiers judged as overweight.
Direct and indirect calorimetry of lactate oxidation: implications for whole-body energy expenditure.
This meta-analysis examined differences and agreement between the Sensewear Armband (SWA) and simultaneous gold standard measures using indirect calorimetry (IC).
Simulated [[??]o.sub.2] ([[??]o.sub.2] sim) was then measured using a standard indirect calorimetry technique, according to the principle of mass balance of [O.sub.2] and [N.sub.2] between fresh gas and mixed exhaust gas streams within the breathing circuit: