scholarly journals Harris-Benedict Equation and Resting Energy Expenditure Estimates in Critically Ill Ventilator Patients

2015 ◽  
Vol 25 (1) ◽  
pp. e21-e29 ◽  
Author(s):  
M. F. Picolo ◽  
A. F. Lago ◽  
M. G. Menegueti ◽  
E. A. Nicolini ◽  
A. Basile-Filho ◽  
...  
Keyword(s):  
Energy Expenditure ◽  
Critically Ill ◽  
Resting Energy Expenditure ◽  
Resting Energy ◽  
Ventilator Patients

scholarly journals A Comparison between Continuous Indirect Calorimetry and Single Weight-Based Formula in Estimating Resting Energy Expenditure in Nutritional Therapy: A Prospective Randomized Controlled Study in Critically Ill Patients

2021 ◽  
Vol 16 (2) ◽  
pp. 207-215
Author(s):  
Cheah Saw Kian ◽  
Keyword(s):  
Energy Expenditure ◽  
Critically Ill ◽  
Indirect Calorimetry ◽  
Resting Energy Expenditure ◽  
Nutritional Therapy ◽  
Controlled Study ◽  
Rank Test ◽  
Icu Mortality ◽  
Cumulative Energy ◽  
Resting Energy

Optimal nutritional therapy is important to improve outcome in critically ill population in an intensive care unit (ICU). Although indirect calorimetry (IC) is currently a gold standard for resting energy expenditure (REE) measurement, yet it is still not routinely used in the ICU. A total of 146 mechanically ventilated patients were randomised to receive enteral nutrition (EN) with energy targeted based on continuous indirect calorimetry (IC) measurements (IC group, n=73) or according to 25 kcal/kg/day (SWB group, n=73). Patient characteristics were equally distributed and the IC group showed lower mean measured REE (1668.1 + 231.7 vs 1512.0 + 177.1 kcal, p<0.001). Results also showed a significant deficiency in the daily (-148.8 + 105.1 vs. -4.99 + 44.0 kcal, p<0.001) and total cumulative energy balances (-1165.3 + 958.1 vs. 46.5 + 369.5 kcal, p<0.001) in the SWB group as compared to the IC group. From the Kaplan-Meier survival analysis, we found that ICU mortality was significantly lower in the IC group with better survival probability compared to the SWB group (log-rank test, p = 0.03). However, both groups showed comparable results in terms of ICU length of stay, duration of mechanical ventilation and incidence of feeding intolerance. In conclusion, this study showed that tightly supervised nutritional therapy based on continuous IC measurement provides significantly less mean daily and cumulative energy deficits as well as significantly reduced ICU mortality rate.

scholarly journals Associations of measured resting energy expenditure with predictive equations, NUTRIC score, and patient outcomes

2021 ◽  
Vol 33 (1) ◽  
Author(s):  
Elham Sobhy ◽  
Radwa Abdel Kader ◽  
Alshaimaa Aboulfotouh ◽  
Mohammed Eshra ◽  
Mohamed Sayed
Keyword(s):  
Energy Expenditure ◽  
Critically Ill ◽  
Patient Outcomes ◽  
Indirect Calorimetry ◽  
Reference Method ◽  
Resting Energy Expenditure ◽  
Nutrition Therapy ◽  
Nutrition Risk ◽  
Penn State ◽  
Resting Energy

Abstract Background Indirect calorimetry is the reference method for measuring resting energy expenditure (REE), but the necessary equipment and technical expertise are not always available. Meanwhile, the NUTrition Risk in the Critically ill (NUTRIC) scale is designed to identify patients who would benefit from nutrition therapy, but no data are available regarding the association of NUTRIC scores with REE. Several predictive formulas are available as alternatives to indirect calorimetry for calculation of energy requirements, but they have not been compared in a homogeneous group of critically ill patients. The purpose of the study is to examine the correlations between energy expenditure and NUTRIC scores or patient outcomes, and to compare measured REE with estimations of energy expenditure. Methods In this observational, prospective study, indirect calorimetry was performed on 50 mechanically ventilated patients. Energy expenditure was also estimated with the bodyweight-based, Faisy–Fagon, and Penn-State PSUm equations. Results REE was higher in patients who survived treatment than in those who died, and was positively correlated with length of stay and duration of ventilation. NUTRIC scores did not correlate with REE. The Faisy–Fagon equation overestimated expenditure, whereas PSUm was unbiased and accurate. Calculations based on 25 kcal/kg bodyweight/day overestimated expenditure, whereas 23 kcal/kg/day produced unbiased estimates with greater accuracy than PSUm. Conclusion REE was positively associated with patient outcomes. Energy expenditure was accurately predicted by calculations of 23 kcal/kg bodyweight/day.

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