I remember having this conversation many years ago with a friend, fellow Type 1, and doctor. He said to me, and I didn't want to hear it, “Your CGM isn't as accurate or precise as you want it to be. It's more like it tells you where you are. ” I thought, why can’t you tell me exactly whether I’m 106, 202, or 57? Well, I understand now.
I'm wearing freestyle libre 3supplies blood sugar levels (actually interstitial fluid) results are displayed every minute, so you can see how inaccurate they are. We don't think like machines when it comes to precision. One minute you might be 104 years old, the next minute you might be 108 years old, and the next minute you might be 105 or 119 years old. And I've learned to pause before deciding whether I need to do anything about my blood sugar levels.
It's mind-boggling to think what's going on inside my body with such fluctuations in measurements from moment to moment. I don't know. What I do know is that no number can be considered a perfect fit. So I'm learning to slow down a little bit and look at the numbers and observe trends. That is the true purpose of CGM. Introducing trends. It shows you where you are, whether you're climbing or at the bottom.
I was looking at CGM today and thought this was worth mentioning.