I have had my Dexcom for only one day and several hours. I went to my endocrinologist for help with putting the first sensor in and instructions etc.- it's in my right middle abdomen area.
I've had several readings which have been from 40- 59 points different than the blood glucose finger sticks as well as incorrect. I can tell when they are wrong on Dexcom right away- the lows and higher readings are all wrong. I'm spending too much time calibrating Dexie.
The last one just said I was 49 and gave me the below 50 alarm, the finger stick was 109.
Should I try another site? I'm not sure what to do. I also think something is wrong with my receiver as it doesn't always seem to vibrate/beep now with warnings all of which have been low.
That is a large part of why I wanted cgm- I have been having low lows and I'm worried about this when I'm sleeping, but none of Dexies readings so far have been correct for that. The other part is to see what is happening all of the time which I can't possibly do with finger sticks alone.
Will this get better? Am I doing something wrong? I'm wondering if after another try with a different sensor/location I should send this back and wait for the new and improved model?
First day is off. Do not calibrate more than 2x/ day as sensore gets confused. . site is fine.
It will get better, definately a little off for the first day or so, then it settles out and becomes invaluable:-)
The longer it's in, the better it is. It seems to need to 'marinate'. Bet you'll love it in a day or so ;)
I like Jrtpup's advice...Let it "marinate". I had to call Dexcom at least 3 times my first few days, give them a buzz and explain (in detail) what had been happening. Their advice will be similar to everything said here...and will probably do great things for your confidence!
Look at chapter 10 of the manual - it gives you a good idea of what kind of accuracy to expect. It is eye opening.
Especially see Table 2 - the hypoglycemic Alert Evaluation.
You will see that with the alarm set 80 mg/dl, the true alert rate is 64%, the false alert rate is 29% and the Missed Alert rate is 36%.
I'll say with most sensors , I get decent results... within 20 mg/dl or so. I've had one sensor so far that was kind of flaky and it died early. Dexcom replaced it. The first day is flakier and tends to jump around.
Be sure you do not take Tylenol or other acetaminophen containing products as these screw up the sensor.
I'm on day 2 1/2- had another false low reading, which didn't wake me because I sleep with earplugs, but I'm only calibrating now when it asks. I will see how it goes, but I'm not sure this is for me. I'm also having pain from the sensor and although I haven't taken any yet, I do need to take pain killers with tylenol at times. I'm on warfarin now and I wonder if that could affect the cgm at all? I guess that would be in the literature also. I will read chapter 10. So far all the low readings and high readings have been totally off by a huge margin so maybe it is this sensor, I don't know.
Thanks for your help!
Just to let you know I called Dexcom- they had me calibrate it 3x 15 minutes apart... I had 3 readings of 95, 93, 92 for that, then Dex jumped back down 2 seconds later to 50 then 57 and then 40 in a very short period- so I called back and they said to stop the sensor and remove and they will send a new one. However when I removed it, the reason for my pain is obvious, I have a red, painful lump now from the sensor... I hope this isn't an infection starting.
I'm not sure what to do now- if I should just give up on the whole thing or try another one somewhere else.
This also means I probably won't tolerate a pump which I wanted to try at some point:(
The rep I spoke with said I was correct to calibrate when there was huge error btw, so that is what you're supposed to do when that happens in case anyone else is wondering.
I always do that. Sorry to hear you are having so much trouble. Perhaps the inflammation is part of why it isn't working well.
I wouldn't assume that you will have the same problem with a pump just yet... or with the Dexcom. Probably worth trying with a new sensor in a new site.
PS. I've noticed the last few days that resting a hot laptop on the sensor makes it drop rapidly...goes away when you the laptop is removed...lol.
me too :(
I had high hope for this- I felt like it was going to be my new best friend and I felt safer going to sleep- but I hated that sensor as soon as it was in me- my body doesn't like foreign objects... there has to be a better way to do this... my brother said there is a cgm which is in trials now in europe which uses lasers so maybe that will be one I can use at some point hopefully if Dex doesn't work out.
I may try another one on my thigh later tonight or tomorrow and give it one more try.
That's funny about the laptop- I wonder why the heat would do that?