A New Way to Assess Energy Expenditure Without a Metabolic Cart Using VCO2 Data

October 13, 2021

Patricia Brown, RD-AP, CNSC

  • Clinical Dietitian Specialist III
  • The Johns Hopkins Hospital

Learn how to calculate EE from VCO2 measurement as a surrogate to IC.

Hear results from a preliminary study demonstrating how:

  • The estimation of the EE:VCO2 may be sufficiently accurate to be considered as an alternative to IC:EE
  • EE:VC02 is more precise than frequently used predictive equations
  • To consider what RQ should be used when applying the VC02 alternative to REE
  • The study is being expanded to automate the EE:VCO2 calculation with the goal of informing patient-centric nutrition plans to avoid under or overfeeding, help reduce length of stay, and improve outcomes with complex ICU, intubated and ECMO patients


Click on a video below to watch.

Waveforms used to view minute by minute CO2 Expenditure

An alternative equation to measure resting energy expenditure

Individual caloric needs for patients

Next steps for calculating resting energy expenditure (REE)