Background and aims Optimal nutritional therapy, including the individually adapted provision of energy, is associated with better clinical outcomes. Indirect calorimetry best tool to measure monitor energy expenditure hence optimize prescription. Similarly other medical techniques, indications contra-indications must be acknowledged optimise use indirect in routine. Measurements should repeate...

Heat production measurements can be performed in two ways: direct and indirect calorimetry. Direct calorimetry is the measurement of heat loss, which under normal steady-state conditions equals the heat production (H). Indirect calorimetry is the calculation of heat production based on parameters related to the heat production, such as respiratory gas exchange (O2 and CO2) and nitrogen excretio...

Severe overfeeding of critically ill patients results in increased complications without clinical benefits. However, the optimal timing and amount of nutrition to feed critically ill adults has not been established. There are multiple prediction equations for estimating calorie expenditure of critically ill patients, but most studies comparing the accuracy of different prediction equations are ...

The MetaCheck (Korr Medical Technologies, Salt Lake City, Utah) is an instrument designed to measure Resting Metabolic Rate (RMR) using indirect calorimetry. Indirect calorimetry is a method of calculating metabolic rate from the measured the amount of oxygen consumed by the body. Using the MetaCheck mouthpiece, the individual being tested breathes in room air and the gas the person breathes ou...

HYSIOLOGICAL STUDY of man's food needs and capacity for physical work began on a systematic basis about seventy years ago. Following upon Atwater's classic experiments with a human calorimeter at the end of the last century, the validity of using rates of oxygen consumption as the basis for measuring energy expenditure (indirect calorimetry) was firmly established. Throughout this early period ...

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 683 1. Historical Overview of the Measurement of Energy Expenditure (EE) Techniques . . . . . . . . . . . . . . . . 684 2. Methods for the Measurement of EE: Overview and Considerations . . . . . . . . . . . . . . . . . . . . . . ....

BACKGROUND AND OBJECTIVES Energy expenditure in severe sepsis/septic shock patients was measured by indirect calorimetry and the correlation of energy expenditure between indirect calorimetry and predictive equations was determined. METHODS AND STUDY DESIGN This was a prospective, observational analytical study. Severe sepsis or septic shock patients were measured for energy expenditure over ...

BACKGROUND Accurate measurement of resting energy expenditure (REE) is helpful in determining the energy needs of critically ill patients requiring nutritional support. Currently, the most accurate clinical tool used to measure REE is indirect calorimetry, which is expensive, requires trained personnel, and has significant error at higher inspired oxygen concentrations. OBJECTIVE The purpose ...

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...