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From what I've heard and seen I would not A. Subject a child to the minimed cgm nor B. Trust it.I have an adult friend who is a t1 and when she tried a dexcom she was SHOCKED that it neither hurt going in nor while wearing it. She wears the medtronic CGM nearly all the time and basically it hurts constantly.
Jon has worn the original Minimed CGMS, the new Enlite sensors for a study (still waiting for approval from the FDA) and now is wearing the Dexcom G4 (for a study). He won't wear the current Minimed CGMS now although he had wonderful success with it for a couple of years. he LOVES the Minimed Enlite sensors and says the Dexcom insertion, while a lot better than the current Minimed sensor is way worse than the Enlite which is coming. (He dioesn't like the Dexcom insertion at all although better than the current Minimed one and also finds the Dexcom sensor too bulky.) He also found the Enlite to have better accuracy than the current Minimed one. Currently he can't comment on the accuracy of the Dexcom as he is in blinded study but will get the device unlocked later. He never had a problem with the original Minimed sensor hurting once it was in - the insertion though needed Emla and he didn't like it.My hope is that both CGMS devices will get better accuracy (and remember meters are often off too so sometimes the CGMS is the accurate number - we found that to be the case sometimes) but that at the very least the new Minimed insertion device will encourage Dexcom to get better with theirs. Jon currently says that when the Enlite sensors are approved he will wear them all the time - I will be interested to see his thoughts after he uses the Dexcom G4 unblinded in a few months.