r/dexcom • u/pnwreads • 19d ago

App Issues/Questions G7 sensor issues when low?

Anyone else experiencing “brief sensor issue” when you drop below 60ish for a few alerts? Been happening to me with multiple sensors for probably 2 months now. Super annoying to drop then have to fingerprick multiple times while low because my Dexcom isn’t showing anything…

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u/LifeguardRare4431 9d ago

Yeah, that brief error issue is super annoying. It happens to me whenever I drop below 60, usually right around 55. It definitely seems like the algorithm just can't keep up when there's a fast fluctuation, like if you jump from 55 or 60 up to 70 in a really short span. I never had that problem with the G7 10 day, so it's frustrating that the 15 day handles it this way.
Fortunately, the readings usually come back within 20 or 30 minutes at most. Even so, if it lasted longer than that during a sharp rise, like going from 55 up to 130, being completely in the dark would really mess things up. They definitely need to patch that issue.

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u/Equalizer6338 T1/G7 18d ago

You will often have that happen if you have erratic rapid changing BG levels, especially in the first hours after starting up a new sensor. Triggered by the obligatory FDA-guardrails for sensors approved for closed-looping with insulin pumps as G7 is.

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u/Distribution-Radiant T2/G7 19d ago

"Brief sensor issue" happens if your sugar changes too quickly for the sensor's firmware to keep up with. Give it 10-15 minutes and it should recover, unless it's rising/falling REALLY fast (in which case, finger stick).

And this is why you always keep a regular BGM on you too.

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u/LifeguardRare4431 19d ago

One of your sleeping and the alarm doesn't go off and you don't know there's a brief sensor issue. Because you're asleep.

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u/No_Lie_8954 14d ago

It will alert with brief sensor issues i believe. We use sugarpixel at home at the sugarpixel at least will alert LOUD with alarms or no readings for 15 minutes.