Jornal de Pediatria
Print version ISSN 0021-7557
SOARES, Fernanda V. M. et al. Indirect calorimetry: a tool to adjust energy expenditure in very low birth weight infants. J. Pediatr. (Rio J.) [online]. 2007, vol.83, n.6, pp. 567-570. ISSN 0021-7557. http://dx.doi.org/10.1590/S0021-75572007000800015.
OBJECTIVE: To determine the resting metabolic rate in very low birth weight infants through indirect calorimetry. METHODS:Cross-sectional study including 29 clinically stable very low birth weight infants receiving an enteral diet > 100 kcal/kg/day. Malnutrition was defined as weight-for-age z score ≤ - 2 SD. Resting energy expenditure was measured using open circuit indirect calorimetry. RESULTS: At the time of the examination, mean weight was 1,564±393 g and corrected gestational age was 35±3 weeks. Malnutrition was diagnosed in 62.1% of the preterm infants. The mean resting metabolic rate was 57.01±7.76 kcal/kg/day. CONCLUSION: Since resting energy expenditure is the main caloric component of total energy expenditure, the high resting metabolic rate observed may have a strong impact on the development of malnutrition during hospitalization.
Keywords : Nutrition; indirect calorimetry; preterm infant.