Serial measurements of energy expenditure in critically ill children: optimizing nutritional therapy?
© The Author(s) 2001
Received: 15 January 2001
Published: 2 March 2001
First, to determine the variation of total daily energy expenditure (TDEE) and respiratory quotient (RQ) in serial measurements of mechanically ventilated critically ill children. Second, to relate TDEE and RQ with daily and cumulative energy intake.
Patients requiring mechanical ventilation for more than 24 hours were enrolled if; FiO2 < 0.60, tubeleakage < 10%, ventilated with Servo 300 (Siemens) and haemodynamically stable. Daily measurements to determine TDEE and RQ were performed (Deltatrac™ II MBM-200, Datex), until the 7th day of admission. TDEE and RQ values were compared with daily and cumulative energy intake.
Day of measurement
RQ (All patients)
During mechanical ventilation of critically ill children, TDEE can be predicted in 82% of the patients by performing only one measurement, despite individual differences. RQ is strongly influenced by the ratio energy intake/TDEE and by the cumulative energy balance. We advocate to feed critically ill mechanically ventilated children according to or in excess of their TDEE as soon as possible during admission, in order to optimize nutritional therapy.