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← Return to CGM vs Finger Stick
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I double-check with a finger stick if my BG reading from my Libre3+ is too high or too low. But you have to remember the sensor is reading interstitial fluid, not your actual blood. This is going to make a time difference which you should take into consideration. I love my sensor and take it for what it says most of the time. Libre also recommends checking with a finger stick for the first few days after applying a new sensor, but I don't always do that. I think it's like a "back-up". Libre also recommends placing the sensor on the back side of your arm. I do that because they did the scientific work, not me!! Some people put them other places on their body but I am happy (at least on this subject!) following their rules.
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@ksdm thank you for your input! I like that Libre products update each minute! Dexcom is 5 minutes. It tries my patience.
I learned about that interstitial vs blood difference years ago when I got my first CGM sensor so I’m aware. That also tries my patience!
Regarding the placement of the sensor. My daughter told me that she was trained to place it on the back side of the upper arm, like you said. She is using a Dexcom G7. This was taught to her by CNP’s at Mayo Endocrinology who are also diabetics and use & prescribe this technology. After hearing that I tried it on my next sensor change and had a compression low and alarm that same night (sigh!).
I also use an Omnipod 5 insulin pump. For years I placed the pump pod on my lower abdomen (below the waist line right or left side of my body). I placed the sensor on the upper abdomen (above the waistline, same side right or left as the pump). I may go back to doing that if I have anymore false compression low alarms in the middle of the night interrupting my sleep! It can be challenging!