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Acta cir. bras ; 26(supl.2): 51-56, 2011. ilus, graf, tab
Article in English | LILACS | ID: lil-602644

ABSTRACT

PURPOSE: The aim of this investigation was to compare the resting energy expenditure (REE) calculated by the Harris-Benedict equation (REE HB) with the REE measured by indirect calorimetry (REE IC) in critically ill surgical patients under mechanical ventilation. METHODS: Thirty patients were included in this work. REE was calculated by the Harris-Benedict equation (REE HB) using real body weight, and it was also measured by indirect calorimetry (REE IC), which was performed for 30 minutes. RESULTS: REE HB had significant (p < 0.0005) but low correlation (Spearman r = 0.57) with REE IC, with a mean bias of 12 kcal.d-1 and limits of agreement ranging from - 599.7 to 623.7 kcal.d-1 as detected by the Bland-Altman analysis. CONCLUSION: These findings suggest that REE IC seems to be more appropriate than REE HB for accurate measurement of REE in critically ill surgical patients under mechanical ventilation.


OBJETIVO: O objetivo deste estudo foi comparar o gasto energético de repouso (GER), calculado pela equação de Harris-Benedict (GER HB) com o GER medido pela calorimetria indireta (GER CI) em pacientes cirúrgicos gravemente enfermos em ventilação mecânica. MÉTODOS: Trinta pacientes foram incluídos nesta investigação. O gasto energético de repouso foi calculado pela equação de Harris-Benedict (GER HB) utilizando o peso corporal real e medido pela calorimetria indireta (GER CI). A calorimetria indireta foi realizada durante 30 minutos. RESULTADOS: O gasto energético de repouso calculado pela equação de Harris-Benedict mostrou uma correlação significativa (p < 0,0005), porém fraca (Spearman r = 0,57) com GER CI, com um viés médio de 12 kcal.d-1 e os limites de concordância variando de - 599,7 a -623,7 kcal.d-1 como detectados pela análise de Bland-Altman. CONCLUSÃO: Estes achados sugerem que a calorimetria indireta parece ser mais apropriada do que a equação de Harris Benedict para a medida exata do GER em pacientes cirúrgicos gravemente enfermos em ventilação mecânica.


Subject(s)
Adolescent , Adult , Aged , Aged, 80 and over , Female , Humans , Male , Middle Aged , Young Adult , Basal Metabolism/physiology , Calorimetry, Indirect/methods , Respiration, Artificial , Surgical Procedures, Operative , Critical Illness , Energy Metabolism , Predictive Value of Tests , Reference Values , Reproducibility of Results , Statistics, Nonparametric
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