Indirect Calorimeter Support

GEMNutrition provides support, maintenance and calibration services for the GEM Indirect Calorimeter.

The GEM (Gas Exchange Measurement) continues to be used by many leading Universities and Nutritional Research institutions in the UK and throughout the world looking at human energy measurement and metabolism.

GEMNutrition will keep your valued GEM in peak operational condition for many years to come.

Calibration tests and checks are also required periodically to ensure accurate measurements of Resting Metabolic Rate (RMR), Resting Energy Expenditure (REE), Volume of Oxygen (VO2) Volume of Carbon Dioxide (VCO2) and Respiratory Quotient (RQ)., GEMNutrition offer a ‘fixed price’ calibration service to ensure stable accurate readings.

We provide an on-call service to suit your needs that can be planned in advance.

Alternatively we can arrange for your GEM to be returned to our extensive facilities at Daresbury for a complete refurbishment, calibration and test examination.

Additionally if you are looking to for new Indirect Calorimetry systems, we will assist you to secure the appropriate specification and system.

Indirect Calorimetry

An indirect calorimeter is a device that calculates a person’s resting energy expenditure (REE).  It does this by measuring the volume of oxygen (VO2) and volume of carbon dioxide (VCO2) as a person breathes in and out.  A person gets their energy by oxidising food; by measuring the amount of oxygen used during this process it possible to calculate Resting Metabolic Rate (RMR).

An important point of measuring both Oxygen and Carbon Dioxide is that this enables the calculation of the Respiratory Quotient (RQ) which is an indicator of the energy source that the body is using (e.g. Fat or Carbohydrate) and is a key clinical parameter.