Evaluation of a Novel Resting Metabolic Rate Measurement System

Download Full Article

Joseph Orr, Ph.D.

University of Utah, Department of Anesthesiology

Salt Lake City, Utah, USA 84132


Resting metabolic rate (RMR) is the rate at which a person burns calories while at rest. Between 70 and 80% of all calories are burned under resting conditions. Knowledge of metabolic rate is vital to nutritional assessment, weight loss planning and care of various medical conditions.

The primary method of metabolic rate measurement is indirect calorimetry. In indirect calorimetry, the rate at which oxygen is consumed and carbon dioxide is produced are measured directly and the caloric burn rate is calculated from the measured oxygen consumption and CO2 production. The relationship between oxygen consumed and calories burned is defined by the Wier equation [1,2]. The standard Wier equation defines the relationship between oxygen consumption (VO2), CO2 production and energy expenditure. Weir also showed that for a specific measurement technique, energy expenditure (caloric burn rate) could be measured without requiring carbon dioxide production measurements [1,2].

Testing of an indirect calorimeter based on Weir’s “O2 only” method is described here. The test system (ReeVue, Korr Medical Technologies, Salt Lake City, UT) is less complex and much less expensive than the standard metabolic rate measurement instruments. Traditionally, metabolic measurements are large instruments that require frequent calibration of their oxygen and CO2 sensors. This type of system is often referred to as a “metabolic cart” because the size of the instrument and related computer and calibration equipment required a cart for transport within the hospital. We compared the REEVUE system against the Deltatrac metabolic cart (Datex-Ohmeda, Finland). The Deltatrac system represents an established clinical standard that has been validated clinically and in-vitro [3,4].

Questions? Contact KORR
Was this article helpful?

Have Additional Questions?

Our KORR Medical Technology specialists are trained to answer any questions you may have. Call us at 1-877-859-3007, or click one of the options below.

Help Center Email Us Call

Replacement Supplies

Browse Supplies
Save & Share Cart
Your Shopping Cart will be saved and you'll be given a link. You, or anyone with the link, can use it to retrieve your Cart at any time.
Back Save & Share Cart
Your Shopping Cart will be saved with Product pictures and information, and Cart Totals. Then send it to yourself, or a friend, with a link to retrieve it at any time.
Your cart email sent successfully :)

The European Union’s ePrivacy Directive (often referred to as the ‘cookie law’) and General Data Protection Regulation (GDPR) places requirements to provide information about, and gain consent for the use of cookies. This site uses cookies. By continuing to use this website, you agree to their use. To find out more, including how to control cookies, see here