What is the respiratory exchange ratio test?

Question

What is the respiratory exchange ratio test done for? What does it indicate and how is it done? Is there a special machine like PFT? Where is it done?

Expert Answer

Dr Neeraj JainFeb 14, 2003

Senior Consultant and Head, Dept. of Respiratory Medicine,
Sir Ganga Ram Hospital,
New Delhi

The respiratory exchange ratio test (RER) is calculated as a ratio of VCO2 and VO2. It is not done routinely for clinical purposes and is mainly a research investigation reflecting energy consumption during exercise.

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What is the respiratory exchange ratio test?

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