Energy expenditure in critically ill surgical patients. Comparative analysis of predictive equation and indirect calorimetry

• Autor(a) principal: Martins,Maria Auxiliadora
• Data de Publicação: 2011
• Outros Autores: Menegueti,Mayra Gonçalves, Nicolini,Edson Antônio, Picolo,Michele Ferreira, Lago,Alessandra Fabiane, Martins Filho,Olindo Assis, Basile Filho,Anibal
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Acta Cirúrgica Brasileira (Online)
• Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0102-86502011000800010
• topic: Calorimetry; Instrumentation; Energy Metabolism; Intensive Care

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.