I have used the Seven Plus for 3 years and now I'm using G4. I just did a finger prick to calibrate and the meter displayed 129. The G4 receiver showed 127. I entered 129 into the receiver and it immediately displayed 119. Shouldn't it display 129? Where did 119 come from? Similar situation happens every time I calibrate. Several times the meter and receiver agree exactly but after entering the same number into the receiver it displays another number up to 15 points different. For example, this happened last week--meter showed 91, G4 receiver showed 91, after entering 91 into the receiver it displayed 98. This has been bugging me since I started using the Dexcom but I just now got around to posing the question. BTW, I always try to calibrate when my blood glucose is steady.
The dex does not force me to input any BG values. As long as dex readout and BG values are close I don't enter any BG values.
Just out of curiosity, and to make sure I understand you - the Dex will *ask* you for BG values, but you don't enter them when asked, correct?
You are correct. The Dex *asks* for BG values, but I don't enter them when asked.
Ultimately its Trending.
HPNpilot raised the pivotal question: How good is the finger stick value? I will never forget that for my very first calibration the 2 values were 90 & 130. Unbelievable. I had no idea that I to wash my hands. These days I only calibrate when 2 BG values are within 5 mg/dl. The dex does not know how good my BG input is. That is part of the problem.