An Accurate Indirect Calorimetry for Measuring Resting Energy Expenditure or Basal Metabolic Rate

Abstract

This paper presents a newly developed indirect calorimetry system for measuring resting energy expenditure (REE) or basal metabolic rate (BMR). The system consists of ventilated hood, gas analysis module, calibration gas, operation and display module, trolley etc. It is low operator dependency and comfortable for test subjects. Experiments with carbon dioxide and nitrogen infusion technology was conducted to test the accuracy of the indirect calorimetry. Measured values were highly correlated (r >0.99, p <0001) with simulated values and the differences were small (1.37% for VO2 and 1.85% for VCO2). The newly developed indirect calorimetry system may potentially act as an accurate tool in the assessment of REE or BMR.