Libre 2 alarms every night

If the sensor is recording ok when you are awake during the day, this sounds like a compression low.
This occurs when you apply pressure to a sensor such as when you lie on it when asleep. It is not the fault of the sensor but the fault of physics and the only way around it is to place your next sensor on a part of your arm that you will not lie on.

This is a common issue (although Abbott ... and Dexcom and all CGM manufacturers do not advertise it).

 

I assume you have checked the settings for low-glucose alarms in LibreLink. The default is 3.9 mmol.

 

Ah, but have you checked your LibreLink Alarm settings?

 

This happened repeatedly to me when I first used the alarm system on Libre 2, so I now have the alarm turned off at night. Its no good me placing the sensor in a different position I don't think, as I toss and turn so much, there is probably no easy way to avoid the compression problem.
I was really excited with the possibilities when I first heard about this alarm facility, but I find it's not so great because like you, it kept me awake, and was virtually always inaccurate.....and since it is really mostly night time that it would have been most useful, I now simply don't turn it on at all!

 

Are you putting the sensor on and waiting at least 24hrs before activating and scanning? I find they are not accurate otherwise.

 

I have found the same, some sensors fantastic, some not so. Hopefully the Libre 3 will solve this. At least Abbott’s are very efficient with replacements.

 

Yes I do exactly that, so for the last 24 hours I have one about to run out and another one on the other arm waiting to be started. Since I did this, Antje77 posted this, they have been very accurate.

 

Why use the libre if you dont want alarms ??? I dont get that

 

My Libre 2 low alarms very rarely work, high ones a bit more but can't rely on them. Have found xdrip much better.
I use the reader to scan Libre, and as I'm frequently awake in the night, have done a lot of checking Libre levels v finger prick tests while lying down, on the opposite arm to Libre placement, so no compression lows.
Without a shadow of a doubt, the Libre frequently shows lower than finger prick tests while lying down. Trouble is, it's not always. According to the Libre I can be hypo for an hour or more sometimes, while finger prick tests are well above 4.0.

 

The first Libre did not have alarms anyway, Ann. It's still useful of course because using Libre means you do not have to depend on finger pricking all the time and can test whenever you want to. It has only been with the introduction of libre 2 that alarms have been a possibility.

 

I find that the Libre varies as to how much below a finger prick it measures. According to my data, I have had 41 hypos in the last 90 days, most of these in the night - but I’m sure I would wake up if I was actually having a hypo. If I am awake and the Libre measures low, I confirm with a finger prick. I have the Libre 1, so I don’t get alarms, but I think I’d rather have the alarm, so I could check with a finger prick. I have found that if the sensor is measuring consistently low, if you let Abbot know, they will replace the sensor.