Abstract
Rationale: In the current critical care nutrition guidelines, the energy delivery formula (25 kcal/kg) does not specify which body weight (BW), i.e. actual (ABW) versus ideal (IBW), should be used to calculate energy delivery. Methods: This is a multi-center, retrospective, observational study. All adult non obese (BMI <30 kg/m2) patients who were admitted to intensive care units (ICUs) were eligible for this study. Patients energy expenditure were estimated using the ESPEN recommendation formula (25 kcal/kg), using ABW and IBW. Results: A total of 160 ICU patients were included in the analysis. The mean BMI were 23.11±3.7 kg/m2. The mean ABW and IBW were 63.3 (±13) and 57.6 (±7) kg, respectively. Using the IBW, the energy expenditure were estimated in mean 1441 (±177) and using ABW 1582 (±318) Kcal, P-value <0.001. Differences of up to 30% below and 47% above were observed when compared the two different weights. Conclusion: Large discrepancies exist in the energy delivery when use ABW or IBW. Further research is needed to determine the influence of this discrepancies in the clinical outcome in ICU.
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