P11: Comparison of indirect calorimetry with Quark RMR and
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P11: Comparison of indirect calorimetry with Quark RMR and M-COVX calorimetres in critically ill patients. 30th November 2013 3rd iFAD– Poster Session 3 Valérie Vanbiervliet Van Biervliet V, Van Regenmortel N, De laet I, Schoonheydt K, Dits H, Malbrain MLNG

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30th november 2013 3rd ifad poster session 3 val rie vanbiervliet

P11: Comparison of indirect calorimetry with Quark RMR and M-COVX calorimetres in critically ill patients

30th November 2013

3rd iFAD– Poster Session 3

Valérie Vanbiervliet

Van Biervliet V, Van Regenmortel N, De laet I, Schoonheydt K, Dits H, Malbrain MLNG

ICU, ZNA Stuivenberg, Antwerp, Belgium


Indirect calorimetry
Indirect Calorimetry

  • Measurement of Resting Energy Expenditure (REE)

  • Non-invasivebedsidemethod

  • Breath-to-breathanalysisthrough gassampling

  • Spontaneous and mechanically-ventilatedpatients

  • Gold standard = DeltatracMetabolic Monitor

  • New methods?

    • Quarck(Cosmed, Rome, Italy)

    • M-COVX (DatexOhmeda, Helsinki, Finland)


Study protocol
Study Protocol

Patients and Methods:

  • Retrospective analysis of data on 11 measurements obtained in 8 mechanically ventilated patients.

  • Exclusion criteria:

    • FiO2 > 0,6

    • Thoraxdrain, or ventilatory leakage

    • Renal replacement therapy

Aims: Comparison of accuracy in the calculation of daily caloric needs and REE with two devices, the M-COVX and the Quark RMR.



Results cont
Results cont.

  • Pearson Correlation P<0,01

    • M-COVX = 0,46 x Quark + 1092 kCal

    • Coëfficient of Variation = 14,2%


Results cont1
Results cont.

  • Bland and Altman Analysis

    • Mean Bias = 243±239 kCal

    • Lower Limit of Agreement = -236 kCal

    • Upper Limit of Agreement = 722 kCal

    • 28,3% Percentage Error


Conclusions

Indirect calorimetrywith M-COVX has a significant correlationwith the Quark RMR, howeverwith the measurementwith the M-COVX shows a systematicoverestimation of 243 kCal of the REE dailycaloricneeds in comparisonwith the Quark RMR.

conclusions