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Measured versus estimated energy expenditure in mechanically ventilated critically ill patients.

Abstract

Accurate determination of energy expenditure is essential in patients receiving nutritional support to meet metabolic needs. The purpose of this study was to assess and compare the energy expenditure as measured by indirect calorimetry (MEE) and estimated by 5 equations in the mechanically ventilated critically ill patients. Forty-six patients were divided into either enteral nutrition (EN) (n=l2), total parenteral nutrition (TPN) (n=16) or combined (EN plus TPN) (n=l8) groups. Patients' energy expenditure was measured by indirect calorimetry on two occasions. Anthropometric and biochemical measurements, energy expenditure and medical status (APACHE II score) were also assessed in the intensive care unit (ICU) of Taichung Veteran General hospital. No significant difference was found in the MEE among the 3 groups. The type of nutritional support did not affect MEE. Energy expenditure calculated by using Harris- Benedict, Kleiber and Liu equations times the estimated stress factor did not significantly different than the values of MEE in all groups. There were significant correlations (P<0.01) between MEE and patients' sex (r=-0.499), age (r=-0.402), height (r=0.533), knee height (r=0.431), current body weight (r=0.379), usual body weight (r=0.407), ideal body weight (r=0.466) and urinary urea nitrogen (r=0.383) in the pooled group. Results demonstrated that energy expenditure could be estimated in most critically ill patients by using Harris-Benedict, Kleiber and Liu equations if the estimated stress factor is in the reasonable value.

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  • Authors+Show Affiliations

    ,

    Critical Care and Respiratory Therapy, Chung Shan Medical University, Taichung. Taiwan, ROC.

    , , , ,

    Source

    MeSH

    Aged
    Calorimetry, Indirect
    Critical Care
    Critical Illness
    Energy Metabolism
    Enteral Nutrition
    Female
    Humans
    Male
    Parenteral Nutrition, Total
    Predictive Value of Tests
    Respiration, Artificial
    Severity of Illness Index

    Pub Type(s)

    Journal Article

    Language

    eng

    PubMed ID

    12056791

    Citation

    Cheng, C-H, et al. "Measured Versus Estimated Energy Expenditure in Mechanically Ventilated Critically Ill Patients." Clinical Nutrition (Edinburgh, Scotland), vol. 21, no. 2, 2002, pp. 165-72.
    Cheng CH, Chen CH, Wong Y, et al. Measured versus estimated energy expenditure in mechanically ventilated critically ill patients. Clin Nutr. 2002;21(2):165-72.
    Cheng, C. H., Chen, C. H., Wong, Y., Lee, B. J., Kan, M. N., & Huang, Y. C. (2002). Measured versus estimated energy expenditure in mechanically ventilated critically ill patients. Clinical Nutrition (Edinburgh, Scotland), 21(2), pp. 165-72.
    Cheng CH, et al. Measured Versus Estimated Energy Expenditure in Mechanically Ventilated Critically Ill Patients. Clin Nutr. 2002;21(2):165-72. PubMed PMID: 12056791.
    * Article titles in AMA citation format should be in sentence-case
    TY - JOUR T1 - Measured versus estimated energy expenditure in mechanically ventilated critically ill patients. AU - Cheng,C-H, AU - Chen,C-H, AU - Wong,Y, AU - Lee,B-J, AU - Kan,M-N, AU - Huang,Y-C, PY - 2002/6/12/pubmed PY - 2002/11/26/medline PY - 2002/6/12/entrez SP - 165 EP - 72 JF - Clinical nutrition (Edinburgh, Scotland) JO - Clin Nutr VL - 21 IS - 2 N2 - Accurate determination of energy expenditure is essential in patients receiving nutritional support to meet metabolic needs. The purpose of this study was to assess and compare the energy expenditure as measured by indirect calorimetry (MEE) and estimated by 5 equations in the mechanically ventilated critically ill patients. Forty-six patients were divided into either enteral nutrition (EN) (n=l2), total parenteral nutrition (TPN) (n=16) or combined (EN plus TPN) (n=l8) groups. Patients' energy expenditure was measured by indirect calorimetry on two occasions. Anthropometric and biochemical measurements, energy expenditure and medical status (APACHE II score) were also assessed in the intensive care unit (ICU) of Taichung Veteran General hospital. No significant difference was found in the MEE among the 3 groups. The type of nutritional support did not affect MEE. Energy expenditure calculated by using Harris- Benedict, Kleiber and Liu equations times the estimated stress factor did not significantly different than the values of MEE in all groups. There were significant correlations (P<0.01) between MEE and patients' sex (r=-0.499), age (r=-0.402), height (r=0.533), knee height (r=0.431), current body weight (r=0.379), usual body weight (r=0.407), ideal body weight (r=0.466) and urinary urea nitrogen (r=0.383) in the pooled group. Results demonstrated that energy expenditure could be estimated in most critically ill patients by using Harris-Benedict, Kleiber and Liu equations if the estimated stress factor is in the reasonable value. SN - 0261-5614 UR - https://www.unboundmedicine.com/medline/citation/12056791/Measured_versus_estimated_energy_expenditure_in_mechanically_ventilated_critically_ill_patients_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0261561402905261 DB - PRIME DP - Unbound Medicine ER -