Fever, illness or stress may result in a varying metabolic rate, which is why frequent measurement is recommended in patients in clinical settings. RMR can vary each day and even within the same day. I did two MedGem measurements and I got different results. Within this range of RQ’s, the use of a constant RQ of 0.85 has a maximum error of ± 2.3%. Under both normal and pathophysiologic conditions, it is extremely rare for a person to have a true metabolic RQ outside the range of 0.75 to 0.95. This is accomplished without measurement of CO2 production. The MedGem measures VO2 consumption and calculates RMR based on a constant RQ of 0.85. RMR can be accurately determined from VO2 alone without the need for measurement of CO2. The intended use of MedGem is for measuring oxygen consumption and determining RMR. Why is CO2 (Carbon Dioxide) not measured? In some instances, this will mean monitoring the metabolic rate daily or weekly. Monitoring these changes will allow the healthcare professional to revise nutritional recommendations to meet the patient’s changing nutritional needs. For example, when a patient develops a fever, the patient’s metabolic rate may increase. In the clinical setting, a patient’s metabolic rate may increase or decrease significantly depending on clinical status. How often should I perform a MedGem Metabolic Test? MedGem is a scientifically validated tool that will improve patient care through accurate, personal nutrition assessment. The MedGem accurately measures patient respiratory airflow and oxygen consumption. When managing a patient’s nutritional needs, knowledge of resting metabolic rate is critically important for accurately assessing a patient’s unique nutritional needs, helping the healthcare professional prevent over- or underfeeding, minimizing post-op complications and reducing length of stay. Most healthcare professionals recognize that resting metabolic rate is impacted by unique characteristics such as age, obesity, body composition (muscle versus fat), recent weight changes, disease state, surgery, fever, stress and medications. Why it is necessary to measure oxygen consumption? Bedside Measurement of Resting Energy Expenditure and Respiratory Quotient via Indirect Calorimetry. With repeat testing, measurements should be taken at the same time of day under similar conditions.
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