I thought I would post this as a new topic. Those who are following this know I have been using two CGMs Dexcom and E500/hBand. I also visited a lab yesterday at 11am. At that point the lab said my blood glucose was 5 mmol/l, the Dexcom said 7.4 mmol/l and E500/hBand said 6.15.
Today, however, I have started with a fast and not had my usual breakfast. I have just eaten some chia seeds and also taken my second 2mg dose of rapamycin (I intend being quite severely calorie restricted just short of a fast, but I wanted some food to go with my daily supplements). However, E500/hBand is coming up with a peak in blood glucose with similar timings to the previous days although with a very slightly different maximum. Dexcom, however, is showing a slight downtrend in blood sugar which is the sort of thing you would expect.
Hence I wonder if E500 is actually making it up on the basis of 3 meals a day. The peak of the meals appears to be around the same time 10.20, 14.15, 20.10 each day. I am quite routine orientated so it would not be surprising normally.
If other E500 users could check their glucose charts and see if they appear dubious that would be kind.
I have not adjusted anything. If it is always 1mmol/L too low I don’t mind. My issue is that it does not seem to be actually measuring glucose.
In any event I don’t actually fast for blood tests. Because I do them every week I see no reason to fast. Hence I would expect a fed level of glucose based upon eating at 9am.
In a strict sense it read a higher level than the lab. You could argue for an interstitial fluid delay of up to 20 minutes, but that does not explain the situation.
H Band collects data and sends to their algorithm/software. Like all other app.
Write to the person/company who developed H Band, jiafu zhang. His point of contact in in the program.
Looking a bit further into this there is a function on the watch to measure glucose. It takes a while to run, asks you to stay still and comes out with values which differ by up to 1 mmol/l on the trot.
There are functions on the watch for spot measurements of several parameters and you can also control/run the measurements parameters from the software.
With the chest band on your chest the ECG records continuous.
I have superimposed my chart on yours. It does seem to be trying to fit any responses from the phone to a three meal day.
When you run the glucose tests from the watch they do vary a lot in sequence. Hence it may be that the software tries to smooth out the variations and fit things to a particular curve, but I would prefer it to report the actual test results and then if needs be create a curve from them.
Dexcom is a bit erratic in its reporting, but it is reporting something close to reality.
The measured glucose number are recorded/stored every 5 minute’s. Then recorded/stored in 30 minutes block showing highest and lowest glucose in the 30 minutes time frame.
