Energy expenditure in critically ill patient

There are a variety of terms for energy expenditure. In severely ill patients, resting energy expenditure should be measured through indirect calorimetry or estimated using an equation or body weight. Although indirect calorimetry provides a more precise method of estimate, the measuring instrument has significant limitations and is not generally accessible in Thailand. Consequently, weight-based estimate is widespread, and it is currently the method that many societies suggest. For optimal results, energy supply should neither be excessive nor insufficient. The average energy delivery should account for between 70 and 85 percent of energy expenditures.