Freestyle Libre 2 with alarms and my experience

Advertising. I received the FreeStyle Libre 2 free of charge from Abbott for testing purposes. My contribution reflects my own opinion, is true and in no way influenced by Abbott.

Realizing a difference in my diabetes therapy

If you are following me on Instagram you may have noticed that I’m using a closed loop system – an App (AAPS) receives blood sugar values every 5 minutes, evaluates them and then controls my insulin pump. A huge dream came true for me and I don’t want to miss this technology anymore. Nevertheless, I notice an increasing dependency. Do I have my smartphone with me? Is the battery charged and does it last for my trip? Is my powerbank still charged? Is the Bluetooth connection still established? I don’t want to complain at all, but I used testing period of the Freestyle Libre 2 to pause my closed loop and to do another kind of diabetes therapy. I call it blood sugar surfing. This type of surfing requires regular monitoring of my blood sugar and would be a heavy burden for me without hypo- and hyper-alarms. This form of therapy is not in any schoolbook, but through the test phase of Freestyle Libre 2 I became aware of what I had done months or even years before without knowing it. Bevor I used the ‘artificial pancreas’ my sugar was 70 to 80 percent within the target range. So, neither I nor a doctor could know what I did to regulate my sugar.

Bloodsugar surfing

What do I mean by blood sugar surfing? When I ate something, I immediately entered the bolus units via the quick bolus function of my insulin pump without even thinking about counting carbohydrates in grams. I was always sure I didn’t need a bolus calculator. I was sure that I injected everything correctly. But what has become a habit over the years has been to pick up sweets as soon as my sugar starts dropping. Shortly before 80 mg/dL my sugar increased again and I stayed within the target range. I realized that I was injecting too much on a regular basis and that I was correcting too high values far too strongly and too often even though insulin was still working.

Even after I had gained this insight, while testing the Freestyle Libre 2 I fell back to my old patterns and to be honest this change was very pleasant. I was more aware of my body’s signals again and I could take more care of my actual diabetes instead of all the technology that sticks on and around my body. For these situations the alarms of the Libre 2 were extremely useful.

The Freestyle Libre 1 and 2 next to each other.

The difference between Freestyle Libre 1 and 2

I don’t need to say much about the visual look of Freestyle Libre 2. It is identical to the Libre 1, but according to Abbott, the Freestyle Libre 2 is more accurate than the Freestyle Libre 1. Since I hadn’t any problems with the accuracy with the Freestyle Libre 1, I can neither confirm nor disprove this. But the technology insight is different. The sensor and the reader have NFC and Bluetooth. Currently it is possible to be warned when a High or Low glucose reading was recognized. To get the actual blood sugar value you have to scan as usual. For those who are not ‘technical experts’ and extended the Libre with unofficial readers, this function is a clear and important advantage compared to the first version. Interesting is the way how or when the alarm is triggered. It only starts when the defined blood sugar limit is exceeded. Once the alarm is confirmed, there is no more alarm. In order to get a new alarm, the blood sugar reading needs to be in range again first. During the day I find this very good, because it leads to fewer alarms compared to CGMS. At night this can become a problem.

It’s a pity that Abbott’s own app and all unofficial transmitters like the BluCon or the MiaoMiao don’t work with the Freestlye Libre 2.

Escaping my diabetes routine

All in all, Freestyle Libre 2 and its alarms make everyday life even easier. In a way, the alarm is more like a reminder to scan the Libre. For me the test was valuable and showed me the dependency on the current algorithms in AndroidAPS. Even if the reorientation to other measuring systems is complex, I find it an enrichment. Therefore, I’m willing to change to other systems more often.

17 thoughts on “Freestyle Libre 2 with alarms and my experience

  1. Thanks for sharing your experience. I have a question regarding “Once the alarm is confirmed, there is no more alarm. In order to get a new alarm, the blood sugar reading needs to be in range again first.”

    Have you found a way to get a new alarm without going into the normal range?

    For example at night, it beeps once due to a high reading, then I inject insulin and sleep. I would expect it to start beeping again after half an hour if it is still high, which it doesn’t. That’s not very convenient.

    1. I feel this is an important feature, recently I started using a new BluCon(it works with Libre 2) which Ambrosia started shipping in July with their app and it works like a charm, it will keep with the frequency you set in the app till you get into the range

    1. yes that is possible. You can change the glucose values for low and high alarms. You can also turn them off individually and setup an alarm for signal loss.

  2. Ich verwende seit einer Woche die Freestylelibre2-Sensoren und hatte seitdem schon zwei Unterzuckerungen. Die Ursache: die Messwerte liegen im Schnitt über 30% über den tatsächlichen Werten. Das gilt auch, nachdem ich den defekten Sensor gegen einen neuen ausgetauscht habe. Das Lesegerät ist in Ordnung, es liegt also an den falsch gemeldeten Daten. Ich kann nur jedem raten, dem System zu misstrauen und regelmäßig mit Teststreifen gegenzumessen!
    H. Gehlsen

    1. Abbott already submitted Libre 2 for FDA approval. Hope is that they will get approval in next couple of months and probable start shipping Libre 2 soon after that. Good luck!!

  3. I have just started to use Freestyle libre2 and have some starters problems. Firstly, that the freestyle always shows significantly higher values than my conventional measurements, even if the blood-sugar levels have been constant for 5-6 hours. Secondly, I get alarms ‘constantly’ indicating lost contact between the iPhone and sensor, having the iPone in my pocket less than 50cm from the sensor.

  4. Is your iPhone in a case that may affect bluetooth signal ? Is phone on same side as Libre ?

    Interesting that the discrepancy is constantly high, but how high is high in units ?

  5. Abbott already submitted Libre 2 for FDA approval. Hope is that they will get approval in next couple of months and probable start shipping Libre 2 soon after that. Good luck!!

  6. Ich habe nun seit vier Tagen das Libre Free Style 2 und muss leider feststellen, dass dieses Gerät ganz und garnicht meinen Erwartungen entspricht. Da da Gerät permanent zu hohe Blutzuckerwerte ausweist und Alarm auslöst, habe ich auf herkömmlichen (Blut aus Fingerbeere) Weg meinen Zuckerwert zur Kontrolle gemessen. Bei ca. 10 Messungen lag dieser Wert um 30 bis 70 (!) unter dem Wert des Libre2. Hinzu kommt, dass der Akku schon nach 4 Tagen “den Geist aufgibt”. Wenn das die viel gepriesenen Innovationen sein sollen, dann möchte ich lieber wider mein altes Libre2 verwenden.
    Oder mache ich etwas falsch?
    Für eine Rückmeldung wäre ich Ihnen dankbar.
    Sie können mich unter 02361 21341 telefonisch erreichen.

    MfG Ghesla

  7. Wieso kann man die Werte aus der LibreLink App nicht an Apple Health weitergeben? So könnte ich die Werte mit Nahrungsaufnahme vergleichen und sinnvoll visualisieren. Die librelink und auch libreview sind funktional doch sehr eingeschränkt.

  8. Has anyone seen anything on failure rates? About 20% of the 14 day sensors don’t work for me for the full 14 days, either because of:

    Water entry into the system (I spend ten minutes in the Jacuzzi after working out)

    Falling off (four times now over about a year)

    Failure to Initialize (error code Er3, 306)

    Has nypne else had this experience?

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