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Press Releases
Press Release - for immediate circulation 15
November 2008
Indirect Calorimeter for Energy Expenditure
Studies
The GEM (Gas Exchange
Measurement) is a state-of-the-art system for indirect calorimetry
at the leading edge of nutrition research.
GEM is an open-circuit
indirect calorimeter designed for nutritionists needing to measure
energy balance and substrate turnover. The compact bedside unit
measures gas exchange volumes, respiratory quotient and energy
expenditure. The GEM determines energy expenditure by alternatively
measuring O2 and CO2 concentrations of both
inspired air and expired air collected from a hood. Flow rate is
continually measured to determine the dilution factor.
Gas collection is via a
comfortable ventilated hood placed over the subject’s head. Air
flow through the hood is completely variable between 20 and 80
litres/min so that measurements can be taken in comfort. The latest
transducers for O2 and CO2 and flow rate
measurement combined with state-of-the-art data acquisition and
control electronics ensure highly accurate measurements.
The whole system is
controlled from custom-designed windows style software on a standard
PC. The whole system is highly automated and easy to use.
- Variable air flow
rate
- Highly automated
operation
- Intuitive, easy to
use software
- Accurate
measurements
- 20 minute
measurement cycle
