Serial measurements of energy expenditure in critically ill children: useful in optimizing nutritional therapy?
| Autor: | Matthijs de Hoog, Wim C. J. Hop, Koen F.M. Joosten, Gijs De Klerk |
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| Přispěvatelé: | Epidemiology, Pediatrics, Pediatric Surgery |
| Rok vydání: | 2002 |
| Předmět: |
Male
medicine.medical_specialty Nitrogen Critical Illness Coefficient of variation Energy balance Urine Intensive Care Units Pediatric Critical Care and Intensive Care Medicine Statistics Nonparametric Excretion Animal science Internal medicine Intensive care medicine Humans Medical nutrition therapy Nutritional Support business.industry Infant Respiration Artificial Respiratory quotient Endocrinology Energy expenditure Child Preschool Female Energy Intake Energy Metabolism business |
| Zdroj: | Intensive Care Medicine, 28, 1781-1785. Springer-Verlag |
| ISSN: | 0342-4642 |
| DOI: | 10.1007/s00134-002-1523-z |
| Popis: | Objectives. To determine the variation in total daily energy expenditure (TDEE) and respiratory quotient (RQ) in mechanically ventilated children and examine the relation to daily and cumulative energy balance toward optimizing nutritional therapy. Methods. Serial measurements of TDEE and RQ were performed in 18 patients (median age 16 months) with an indirect calorimeter during admission (total 69 TDEE measurements). Daily caloric intake was recorded, and after determination of the amount of carbohydrates and fat a RQ of these macronutrients (RQmacr) was obtained. Daily 24-h urine was analyzed for urinary nitrogen excretion. Results. There was a great variability in the median serial TDEE between children (40–64 kcal/kg), while the variation within individual children was small; the mean intraindividual coefficient of variation (CV) in daily measurements of TDEE was less than 10% in 15 of the 18 children (83%). On the last day of measurement 8 children with a positive cumulative energy balance (+98 kcal/kg) had a significantly higher RQ than 10 with a negative cumulative energy balance (–24 kcal/kg, 0.89 vs. 0.84). From the difference between RQ and RQmacr the optimal caloric intake was determined as 1.4× TDEE, divided into 60% carbohydrates and 40% fat. From the median nitrogen excretion of 33 samples (300 mg/kg per day, range 60–708) optimal daily protein intake was calculated as 1.9 g/kg (range 0.4–4.4). Conclusions. For most children a single measurement of TDEE gave a good insight in the daily energy needs. RQ is strongly affected by the ratio energy intake/TDEE and by the cumulative energy balance. Optimal caloric intake was found to be 1.4× TDEE with a daily protein intake of 1.9 g/kg. |
| Databáze: | OpenAIRE |
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