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[IP] CGM Accuracy



 The following is from an article titled 'Five Myths of CGM' published in the
June issue of Medtronic Diabetes' June, 2016 'News to Infuse' email.

"Myth 2: CGM devices are not accurate.

 Reality: An oldie but goodie. It is important to note that sensor glucose
readings are taken from your interstitial fluid (fluid surrounding the cells in
your tissue), whereas finger stick tests are taken directly from your blood.
Because the readings are from two different places, there is a natural lag
between glucose levels in the interstitial fluid and glucose levels in the
blood. Therefore, itbs normal, and should be expected, for your sensor glucose
readings and BG readings to be different but for the most part they should be
close.

 One thing to keep in mind is that when you check your BG other CGMs
automatically change the sensor number to match the BG number. This does not
necessarily mean itbs more accurate. Often, it doesnbt make sense to just
match the BG since the sensor is measuring glucose from interstitial fluid, a
different part of the tissue (not the blood). Our sensors take into account
multiple factors in the calibration to provide an accurate glucose sensor
reading."

 If this is true then Dexcom's perceived accuracy may be a self fulfilling
prophecy. Is this article factually correct? I have never used a Dexcom CGM. Has
anybody used both the Enlite and Dexcom sensors?

Jerry Smith
.
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