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Cosmed Fitmate GS

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The Fitmate GS is the first portable desktop indirect calorimeter using the dilution technique for accurate measurements of Resting Metabolic Rate (RMR) in a clinical setting. With an integrated canopy hood, it is the ideal companion for bed-side applications and for interdisciplinary nutritional monitoring by hospital Nutrition Support Teams (NST). The use of a ventilated hood make the test highly comfortable allowing patients to breathe freely. The ventilated hood can also be used for long periods of time with minimal discomfort and no air leaks from the system. Fitmate GS allows affordable, simple and quick measurement without the need of consumables and complicated calibration procedures with gas cylinders.

Accurate Resting Energy Expenditure

Fitmate has been validated for the measurement of Oxygen Consumption (VO2) and Resting Metabolic Rate (RMR/REE). It measures VO2 and assumes a constant Respiratory Quotient (RQ), set at 0.85 (or user defined according to the measured RQ of the patient). By taking this assumption Oxygen uptake (VO2) is measured in real time and data is shown every 30 seconds. RMR testing is simple, fast and a report printout is provided in seconds via the built-in thermal printer.

Fitmate GS ideally complements the use of a full VO2/VCO2 indirect calorimetry laboratory (like COSMED Quark RMR). In conjunction with the measurement of gas exchanges, RQ and metabolism substrates with the IC laboratory, Fitmate GS allows fast, flexible and more frequent baseline monitoring of the nutritional status of all patients.

Dilution Technique with Canopy Hood

Fitmate GS comes with a large and comfortable transparent hood connected to a blower that guarantees air flow inside the hood. The blower pumps air in and out at a defined flow, chosen among five different flow rates dependent on subject weight.

The patient lies in bed and comfortably breathes inside the hood, where the expired gas dilutes with room air. A sample of this mixture is then conveyed to the turbine and sampling line in order to get ventilation parameters and oxygen concentration. The Fitmate screen prompts messages and security alerts when ventilation is not detected or when oxygen concentration is too low or too high, in this case the flow rate can be regulated by the blower in order to keep a steady concentration of O2 inside the hood. For safety reasons the blower is equipped with 4 AA batteries (not rechargeable) to prevent failures due to lack of power.


Fitmate GS: a reliable and easy to use device


The nutritional care and management of confined-to-bed patients includes provision of adequate nutrition support to reach and maintain a desirable body weight, to improve nutritional status and to prevent negative outcomes associated with overfeeding or underfeeding. Inappropriate nutrition support (underfeeding or overfeeding) can have harmful consequences for the health of the patient and significant impact on costs of treatment, rate of complications, increased length of hospital stay and mortality. The success of nutrition support relies, therefore, on accurately determine energy requirements so that adequate energy and nutrients can be provided to the patient. While prediction equations are generally considered not as accurate as required for predicting the energy expenditure in a clinical setting, Indirect Calorimetry is the “Gold Standard” for determining caloric needs in confined-to-bed patients and is indispensable for Nutrition Support Teams providing nutrition care to patients in different departments of the hospital. Some of the ideal applications and settings for Fitmate are:

  • Hospital Nutrition Support Team (NST)
  • Post-surgery
  • Burn units
  • Bariatric surgery
  • Dialysis
  • Nursing homes



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