Indirect Calorimetry: From Expired CO2 Production, Inspired O2 Consumption to Energy Equivalent
نویسندگان
چکیده
منابع مشابه
Energy expenditure in critically ill patients estimated by population-based equations, indirect calorimetry and CO2-based indirect calorimetry
BACKGROUND Indirect calorimetry (IC) is the reference method for measurement of energy expenditure (EE) in mechanically ventilated critically ill patients. When IC is unavailable, EE can be calculated by predictive equations or by VCO2-based calorimetry. This study compares the bias, quality and accuracy of these methods. METHODS EE was determined by IC over a 30-min period in patients from a...
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BACKGROUND Methods to calculate energy expenditure (EE) based on CO2 measurements (EEVCO2) have been proposed as a surrogate to indirect calorimetry. This study aimed at evaluating whether EEVCO2 could be considered as an alternative to EE measured by indirect calorimetry. METHODS Indirect calorimetry measurements conducted for clinical purposes on 278 mechanically ventilated ICU patients wer...
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The purpose of this investigation was to validate a new system of breath-bybreath expired gas analysis to both an artificial working model of lung ventilation and gas exchange as well as to the Douglas bag technique. In addition, comparisons will be made between expired fractions, ventilation, and computations of VO2, VCO2, and RER between the new system and a commercial mixing chamber system (...
متن کاملEnergy Expenditure Measured by Indirect Calorimetry in Obesity
Mika Horie et al [2] demonstrated that obese women had higher total energy expenditure (TEE), compared with normal weight. However, this increase may be due to increased basal metabolic rate (BMR) due to higher fat-free mass (FFM) and energy demand during physical activity. However, Melo et al [3] found that obese individuals are economical, the metabolic point of view. Therefore, the energy ex...
متن کاملVentilatory response to exercise in aged runners breathing He-O2 or inspired CO2.
The ventilatory response to exercise below ventilatory threshold (VTh) increases with aging, whereas above VTh the ventilatory response declines only slightly. We wondered whether this same ventilatory response would be observed in older runners. We also wondered whether their ventilatory response to exercise while breathing He-O(2) or inspired CO(2) would be different. To investigate, we studi...
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ژورنال
عنوان ژورنال: Journal of Obesity & Weight Loss Therapy
سال: 2015
ISSN: 2165-7904
DOI: 10.4172/2165-7904.s5-001