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Harris-Benedict equation for critically ill patients: are there differences with indirect calorimetry?
J Crit Care 2009; 24(4):628.e1-5JC

Abstract

PURPOSE

The aim of this study was to compare the measured energy expenditure (EE) and the estimated basal EE (BEE) in critically ill patients.

MATERIALS AND METHODS

Seventeen patients from an intensive care unit were randomly evaluated. Indirect calorimetry was performed to calculate patient's EE, and BEE was estimated by the Harris-Benedict formula. The metabolic state (EE/BEE x 100) was determined according to the following criteria: hypermetabolism, more than 130%; normal metabolism, between 90% and 130%; and hypometabolism, less than 90%. To determine the limits of agreement between EE and BEE, we performed a Bland-Altman analysis.

RESULTS

The average EE of patients was 6339 +/- 1119 kJ/d. Two patients were hypermetabolic (11.8%), 4 were hypometabolic (23.5%), and 11 normometabolic (64.7%). Bland-Altman analysis showed a mean of -126 +/- 2135 kJ/d for EE and BEE. Only one patient was outside the limits of agreement between the 2 methods (indirect calorimetry and Harris-Benedict).

CONCLUSIONS

The calculation of energy needs can be done with the equation of Harris-Benedict associated with lower values of correction factors (approximately 10%) to avoid overfeeding, with constant monitoring of anthropometric and biochemical parameters to assess the nutritional changing and adjust the infusion of energy.

Authors+Show Affiliations

Departamento de Clínica Médica, Universidade de São Paulo, Brasil. camila@fmrp.usp.brNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

19327332

Citation

Japur, Camila C., et al. "Harris-Benedict Equation for Critically Ill Patients: Are There Differences With Indirect Calorimetry?" Journal of Critical Care, vol. 24, no. 4, 2009, pp. 628.e1-5.
Japur CC, Penaforte FR, Chiarello PG, et al. Harris-Benedict equation for critically ill patients: are there differences with indirect calorimetry? J Crit Care. 2009;24(4):628.e1-5.
Japur, C. C., Penaforte, F. R., Chiarello, P. G., Monteiro, J. P., Vieira, M. N., & Basile-Filho, A. (2009). Harris-Benedict equation for critically ill patients: are there differences with indirect calorimetry? Journal of Critical Care, 24(4), pp. 628.e1-5. doi:10.1016/j.jcrc.2008.12.007.
Japur CC, et al. Harris-Benedict Equation for Critically Ill Patients: Are There Differences With Indirect Calorimetry. J Crit Care. 2009;24(4):628.e1-5. PubMed PMID: 19327332.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Harris-Benedict equation for critically ill patients: are there differences with indirect calorimetry? AU - Japur,Camila C, AU - Penaforte,Fernanda R O, AU - Chiarello,Paula G, AU - Monteiro,Jacqueline P, AU - Vieira,Marta N C M, AU - Basile-Filho,Anibal, Y1 - 2009/02/12/ PY - 2008/09/01/received PY - 2008/11/24/revised PY - 2008/12/08/accepted PY - 2009/3/31/entrez PY - 2009/3/31/pubmed PY - 2010/3/5/medline SP - 628.e1 EP - 5 JF - Journal of critical care JO - J Crit Care VL - 24 IS - 4 N2 - PURPOSE: The aim of this study was to compare the measured energy expenditure (EE) and the estimated basal EE (BEE) in critically ill patients. MATERIALS AND METHODS: Seventeen patients from an intensive care unit were randomly evaluated. Indirect calorimetry was performed to calculate patient's EE, and BEE was estimated by the Harris-Benedict formula. The metabolic state (EE/BEE x 100) was determined according to the following criteria: hypermetabolism, more than 130%; normal metabolism, between 90% and 130%; and hypometabolism, less than 90%. To determine the limits of agreement between EE and BEE, we performed a Bland-Altman analysis. RESULTS: The average EE of patients was 6339 +/- 1119 kJ/d. Two patients were hypermetabolic (11.8%), 4 were hypometabolic (23.5%), and 11 normometabolic (64.7%). Bland-Altman analysis showed a mean of -126 +/- 2135 kJ/d for EE and BEE. Only one patient was outside the limits of agreement between the 2 methods (indirect calorimetry and Harris-Benedict). CONCLUSIONS: The calculation of energy needs can be done with the equation of Harris-Benedict associated with lower values of correction factors (approximately 10%) to avoid overfeeding, with constant monitoring of anthropometric and biochemical parameters to assess the nutritional changing and adjust the infusion of energy. SN - 1557-8615 UR - https://www.unboundmedicine.com/medline/citation/19327332/Harris_Benedict_equation_for_critically_ill_patients:_are_there_differences_with_indirect_calorimetry L2 - https://linkinghub.elsevier.com/retrieve/pii/S0883-9441(08)00262-1 DB - PRIME DP - Unbound Medicine ER -