Dexcom Users

For users of a Dexcom Continuous Glucose Monitoring ("CGM") device

Just as a reminder with the recent release of the new Dexcom G4 to the US market--it is NOT okay to post about previous models or older sensors as being 'for sale' on this site.

It is a violation of the Terms of Use because it is a prescription device, and any such efforts will unfortunately be removed.

We encourage you to donate supplies to non-profits such as the Charles Ray III Diabetes Association (, which accepts unexpired glucometer and insulin pump supplies, or alternatively you may talk to your physician's office or other local medical group to discuss donating them to those in need of assistance.

Thank you all for kindly refraining from this activity.

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Rich demos insertion of a G4 sensor- video

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Diabetes Forum

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Comment Wall


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Comment by Jessica05 on October 30, 2011 at 8:20pm
Hi, Everyone~
I just did my first Dexcom insertion on my daughter, and it went pretty smoothly. However, we put a big Tagaderm over the whole site like we did with the Medtronic CGM...only after did I read in the booklet that you shouldn't tape any part of the plastic/sensor. What should I do? My daugher is 6 and the sensor is on her upper glut, I am concerned if I don't tape it down, she might pull it off in the restroom.

Any suggestions? Thanks!
Comment by jrtpup on October 27, 2011 at 10:18am
I suspect that any minor scarring left from a previous site would affect another put in the same place. JMHO though ;)
Comment by Massimo on October 27, 2011 at 9:56am
jrtpup, thanks for your comment. Actually I meant that the position is symmetric with respect to the previous one :) I am not sure that the distance is at least 3" though. I thought that that was the "lower bound" of the distance from the injection site.
Comment by jrtpup on October 27, 2011 at 9:51am
When you say 'the position is the same' do you mean you put the sensor in the same place all 3 times? If so, that might be the problem. Rotate to a new place, at least 3" away.
Comment by metheniac on October 27, 2011 at 9:06am
As far as I know, the newest one is the Seven Plus. Perhaps Laura has the one before that?
Comment by Luca Bertagnolio on October 27, 2011 at 9:03am
Ciao Massimo, I agree with what Sandy says, maybe it's been a more complicated calibration for the machine the second time, and the numbers still don't make much sense.

In any case, DO NOT calibrate the receiver exactly when it tells you to enter a BG reading especially if you are still with unstable BG after lunch or dinner; rather wait until you have a reasonable flat line, meaning that you are at least stable, and only then do check your actual BG with a strip and enter the result into the Dexcom.

Calibrating the Dexcom while your BG is rapidly changing is never a good idea, in my two and a half years experience with the Dexcom Seven Plus.

A presto, Luca
Comment by Sandy Palmer on October 27, 2011 at 8:55am
I wasn't aware that there is a new one.
Comment by Laura on October 27, 2011 at 8:54am
Hi - I just received a call from Dexcom saying that I was able to get an updated Dexcom. Well, I just got mine this year. Is the new one that much different/better that I should switch or are they just looking at my insurance deductible and saying hey! She can get another one for free! Any big differences out there? Also - do the meters "run out" after a specific time?
Comment by Sandy Palmer on October 27, 2011 at 8:53am
Hello Massimo, sometimes that happens to me too and I just do more fingersticks and calibrate. If it doesn't self correct by day two I (this is only for me and ymmv) I shut it down and leave it be for a few hrs and then restart the sensor. Not sure what causes this but mine are always more accurate after the first few days. Overall I am very happy with it. Good luck
Comment by Massimo on October 27, 2011 at 8:43am
Hi, I am a "new" user of Dexcom. The first two sensors were (very!) accurate for more than 8 days. The third one which I have been wearing for more than 50 hours is far less accurate, totally unsatisfactory. The position is the same, the transmitter seems to be well placed, there should be no water between sensor and transmitter as I put tegaderm on it.

Do you think this difference might be related to a sore throat/cold I am having at the moment? I have taken no paracetamol (actually no drugs whatsoever).

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