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Should I be worried with these LibreLink Readings? Type 2

M

midiman

Active Member
Messages
28
Hi,
I purchased a sensor and I have been using it for a few days.

I don't know how accurate these CGMs are.
When I use a finger prick device it can be +2 higher.

Should I be worried and speak to my GP?

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The finger tip device is the most accurate. That’s a nice flat line overnight and looks as if it’s likely to be between five and six (based on your comment above) which is fine.
 
Do you have any kind of diabetes? and are you on any medication?

The figures of themselves are ok in terms of a low bg - pretty much where I am right now according to fingerprick.

CGMs tend to read a bit lower than fingerpricks, and fingerpricks are also a bit more accurate, but not precise by any means.
 
KennyA said:
Do you have any kind of diabetes? and are you on any medication?

The figures of themselves are ok in terms of a low bg - pretty much where I am right now according to fingerprick.

CGMs tend to read a bit lower than fingerpricks, and fingerpricks are also a bit more accurate, but not precise by any means.
Click to expand...

As others have said finger pricking is more accurate , more painful and cheaper. The upside of the cgm is that it’s constantly there and you can see pretty much instantly what food and activities and sleep do to your glucose levels.
 
 Some CGMs are set to give readings lower than others, the Libre2 plus seems to be one of these. I get readings like yours, especially during the night. Fasting gives really low readings for me, sometimes the Libre2 plus displays less than 3.0, but a fingerstick shows I am not hypoglycemic. Sometimes the sensor may be pressed against something and that can give a false low. Exercise can give similar lows for me, but again this has never been hypoglycemia. I find the Libre2 plus gives readings ~1 mmol/l lower than a fingerstick test. I tried another brand of sensor and it gave readings similar to a fingerstick test, but the time between readings was some 5 minutes.
 
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