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Table 2 Overview of comparative studies of IC devices in mechanically ventilated patients [16, 64,65,66,67]

From: Energy expenditure and indirect calorimetry in critical illness and convalescence: current evidence and practical considerations

 

Q-NRG®

Deltatrac®

Deltatrac® (Datex, Finland)

- (No) significant difference in measured REE [16]

- Measurements using Q-NRG® significantly faster [16]

 

QUARK RMR®

(Cosmed, Italy)

- Significant difference in measured REE (p = 0.038)

- Measurements using Q-NRG® significantly faster [16]

- No significant difference in mean REE (p = 0.166)

- No significant differences EE, VCO2, and VO2 [66]

- Significant difference in RQ (p < 0.0001) not favoring Deltatrac®, due to measurement values outside the physiological range [60]

- Overestimation of VO2 and VCO2 by QUARK RMR® [67]

Vmax® (Vyaire, USA)

- Significant difference in measured REE (p < 0.001)

- Measurements using Q-NRG® significantly faster [16]

- No significant difference in REE (p = 0.8) is not reliable enough in a clinical research setting [65]

E-COVX® (Datex-Ohmeda, Finland)

- No significant difference in measured REE (p = 0.165)

- No significant difference in the duration of measurement

- Overestimation of VO2 and VCO2 by E-COVX® [67]

CCM Express® (Medgraphics, USA)

 

- Significant difference in mean REE (p < 0.0001)

- Significant difference in RQ (p < 0.0001)

- Significant differences in RQ and VO2 and VCO2 (p < 0.0001) [66]