©2006 Microlife USA, Inc. All Rights Reserved. Microlife, MedGem, and BalanceLog are trademarks of Microlife, Inc.
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Frequently Asked Questions (cont.)
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What if my patient is taking medications that might affect the RMR?
If a patient is on any medications that contain stimulants or depressants, there will be a commensurate
impact on RMR. The clinician administering the measurement is best suited to determine whether the
measurement should be taken when the patient is on the medication or whether the measurement should
wait until medication use has been stopped for a period of time. Thyroid medication will not impact
measurement results even if the medication is taken right before a measurement as this is part of a normal
regime for a patient and will be considered part of the patient’s “normal” state. When using inhalers, it is
preferred to have the patient refrain from usage immediately prior to a MedGem measurement. If the patient
is unable to perform them measurement without using an inhaler, rescheduling of the test is suggested.
Will smoking affect the MedGem measurement?
Nicotine will increase resting metabolic rate because it is a stimulant. If the patient is a smoker this is the
“normal” state and measurement will reflect the patient’s individual metabolic rate. When performing a
measurement, encourage the patient not to smoke immediately prior to a measurement. If a patient quits
smoking, monitoring changes in RMR is recommended to adjust calorie levels.
MedGem Use
How accurate is the MedGem measurement?
The MedGem unit has been validated against the Douglas Bag method, the gold standard in metabolic
Measurements, and compared to other metabolic carts. The BodyGem unit is as accurate and reliable as
any indirect calorimeter system on the market. In several studies the BodyGem has repeatedly
demonstrated an accuracy of 1-3% when compared to other standard reference systems. The MedGem’s
portability makes measuring metabolism possible for most individuals and professionals.
Will the mask and mouthpiece produce different results?
The mouthpiece and mask will produce the same results if used properly. When using either single-use
breathing attachment, it is important to have a good seal and ensure no air is leaking. If you are using the
mouthpiece/ nose clip, the patient should not be able to breathe through the nose and the mouth should seal
around the mouthpiece so all of the air is going into the MedGem unit. If you are using the mask, the patient
should not feel air leaking out along the face. If the patient wears glasses, removing them will assist in
getting a tight seal. Some people find that it is easier to maintain a good seal while using the mouthpiece.
When properly used, both items provide accurate results. Men with facial hair, especially beards, should use
the mouthpiece to maintain a good seal.
Can I reuse the mask or mouthpiece?
No. By FDA regulation, the disposable mouthpiece and facemask insert may only be used for a single
measurement and should be discarded after each test.
Subsequent measurements on the same person require the use of a new breathing attachment. The soft
shell mask and mouthpiece insert contain medical grade filter material and are intended for one-time use
only. The single-use breathing attachments should be discarded after a successful measurement to avoid
cross-contamination.
How do I order new masks/mouthpieces/nose clips?
You can order new masks, mouthpieces and nose clips through Microlife at 1-800-568-4147.
