Just as Bisi was the one to nudge us into getting her on an insulin pump, she has now pushed us to get her a Constant Glucose Monitor (CGM)—the Dexcom Platinum. I’m not quite sure why she was so insistent about it. An older friend of hers with type 1 has the Platinum, and Bisi heard from her that she wouldn’t have to test her blood sugar as often with it. But with Bisi, so far we haven’t found the CGM to be a substitute for finger sticks. If anything, the CGM inspires us to test more rather than less. At times, the CGM is accurate within a point or two. At other times, we’ve seen it be off target by as much as 100 points, so in those cases if we were using it to determine how much insulin to give Bisi, she’d be in trouble. So it’s hard to know when you can trust the CGM and when you can’t (though now that she’s been using it for about a month, it seems to be getting more reliable).  Also, we’re testing more because with the CGM we’re now catching more times when her blood sugar is either too high or too low.

The CGM involves a small sensor—about the size of a Brazil nut—on Bisi’s body, with a thread-like tube that measures the glucose in Bisi’s interstitial fluid, rather than her blood, which is what we measure with the finger sticks. The glucose readings are displayed on a small device about the size of an iPod Nano, which has to be within 20 feet of Bisi’s sensor to work. The readings are updated every five minutes and displayed in a graph. One of the great things about the CGM is that it shows glucose trends. So with the finger stick we just know that Bisi’s glucose level

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  • Description: Just as Bisi was the one to nudge us into getting her on an insulin pump, she has now pushed us to get her a Constant Glucose Monitor (CGM). I’m not quite sure why…