Results 251 to 260 of about 62,552 (302)

Circulatory Indirect Calorimetry in the Critically III

Journal of Parenteral and Enteral Nutrition, 1991
Circulatory indirect calorimetry (CIC) is a potentially useful method to assess the energy requirements of critically ill patients. Unlike respiratory indirect calorimetry (RIC), which measures oxygen utilization from inhaled and exhaled gases, CIC measures oxygen utilization from arterial and mixed venous blood.
R R, Williams, C R, Fuenning
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Indirect calorimetry: methodological and interpretative problems

American Journal of Physiology-Endocrinology and Metabolism, 1990
The technique of indirect calorimetry is now widely used to examine rates of energy production and substrate oxidation in humans. Although the basic principles of indirect calorimetry are well established, it is important to recognize that there are several potential pitfalls in the methodology and data interpretation that must be appreciated to ...
D C, Simonson, R A, DeFronzo
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Indirect calorimetry in the ICU

2016
Abstract Critically-ill patients have unpredictable and dynamic metabolic demands that are difficult to predict and quantify. Combined with the high incidence of pre-existing or development of malnutrition in the ICU, these metabolic demands have deleterious effects on outcomes when patients are provided with inadequate or inappropriate ...
Joseph L. Nates, Sharla K. Tajchman
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Indirect Calorimetry: A Practical Guide for Clinicians

Nutrition in Clinical Practice, 2007
This review provides clinicians with a comprehensive overview of indirect calorimetry including the principles, methodology, technologic advancements, benefits, and challenges. Clinical applications for indirect calorimetry and the potential limitations are specifically addressed for both the inpatient and outpatient setting.
Heather A, Haugen, Lingtak-Neander, Chan, Fanny, Li   +2 more
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Indirect calorimetry in the mechanically ventilated patient

Critical Care Medicine, 1987
We used indirect calorimetry to measure oxygen consumption (VO2) and carbon dioxide production in 29 mechanically ventilated patients. These data were compared to VO2 measured simultaneously by a standard thermodilution technique. A good correlation was demonstrated between the methods, but VO2 measured by indirect calorimetry was 15% higher than VO2 ...
M R, Levinson, J S, Groeger, S, Miodownik, C, Ray, M F, Brennan   +4 more
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Indirect Calorimetry in Chair‐Adapted Primates

Journal of Parenteral and Enteral Nutrition, 1986
This paper describes the construction of an indirect calorimeter for measurement of respiratory gas exchange in the chaired primate. Preliminary determinations of energy expenditure and respiratory quotient in five animals under a variety of dietary conditions suggest that this system will prove useful in the laboratory study of primate nutrition ...
D T, Dempsey, L O, Crosby, J L, Mullen
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Microprocessors in indirect calorimetry

Journal of Microcomputer Applications, 1984
Abstract Indirect calorimetry calculates energy expenditure and respiratory quotient from oxygen consumption and carbon dioxide production. Continuous flow ventilated hood systems allow prolonged measurements to be made. The incorporation of a microprocessor enables immediate computation and graphic display during a calorimetry run, processing of ...
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Indirect calorimetry as point of care testing

Clinical Nutrition, 2019
Determining energy requirement is a fundamental of nutrition support. Indirect calorimetry (IC) has been long recognized as the gold standard for assessing basal or resting energy expenditure (REE). The measurement of REE is recommended particularly in the situation where adjustment of energy provision is critical.
Sornwichate, Rattanachaiwong, Pierre, Singer   +1 more
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Using Direct Calorimetry to Test the Accuracy of Indirect Calorimetry in an Ectotherm

Physiological and Biochemical Zoology, 2006
We previously demonstrated that the relationship between respiratory gas exchange and metabolic heat production is unexpectedly variable and that conventional approaches to estimating energy expenditure by indirect calorimetry can incorporate large errors.
Glenn E, Walsberg, Ty C M, Hoffman
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The theoretical bases of indirect calorimetry: A review

Metabolism, 1988
Indirect calorimetry is the method by which the type and rate of substrate utilization, and energy metabolism are estimated in vivo starting from gas exchange measurements. This technique provides unique information, is noninvasive, and can be advantageously combined with other experimental methods to investigate numerous aspects of nutrient ...
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