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Guardian Sensor Infusion Sets Medtronic Contour next Link 2.4 meter Medtronic MiniMed 670G

The perfect storm – pizza, sensor change, and a kinked infusion set canula = readings out of this world!

 

The Perfect storm. New infusion set, sensor, and pizza.

Lesson I learned: At the beginning of sensor life, it might not be a good idea to only depend on sensor readings only.  Also, probably not a good idea to change the Guardian sensor, infusion set and eat pizza close together!


Last night, I had what I would call a perfect storm where I replaced my sensor and infusion set and then ate pizza. Unfortunately, my sensor did not catch up with a sharp rise in blood sugar since it had not stabilized. I only caught the high sugar readings when I checked my meter Blood Glucose (BG) reading.

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Auto Mode Basal Settings PUMP REVIEW Pump Settings

Shortcomings of the Medtronic MiniMed 670g, Auto Mode and Guardian 3 sensors

From the onset let me say I think the Medtronic MiniMed 670G and the Auto Mode setting are a big leap forward in glucose control for Type 1 diabetes. Closed loop insulin pump technology is the technology of the future. Personally I foresee the insulin pump becoming an install-and-forget type of medical device in the near-future. While in no way perfect, the first iteration of the MiniMed 670G was a great step forward in this direction.

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Auto Mode Pump Settings

Solution for the Medtronic 670G AutoMode BG Loop

UPDATE 09/10/19 – A new enhanced transmitter to resolve the BG loop issue is being issued to Medtronic MiniMed 670G owners. This has worked beautifully for me since receiving it about 3 months ago.

To request for the new enhanced transmitter follow this link.

Or you can contact your Medtronic Diabetes Educator or call Medtronic directly for one.


Couple weeks ago, I could not enter Auto Mode on my 670G for three days due to the dreaded “BG Required Loop.” As a solution, I eventually had to change the sensor to be able to re-enter AutoMode.

God knows I have tried to resolve the issue using every advise given online in forums (including trying to “fake” the system by entering a number just above or below your last entry) but these have only worked only a couple times.

What I think Causes the BG Required Loop

At issue I think is the way that the 670G calibrates the Guardian sensor. It seems to be programmed to validate the BG you’ve entered into the system probably based on the ISIG history and its predictive model of where your BG readings are trending towards.

Sounds complicated?

Categories
Glucose Test Meters Medtronic Contour next Link 2.4 meter

Comparison of the Medtronic Contour next Link 2.4 meter and the ONETOUCH UltraMini

I recently set out to compare the two meters since I like to have a back up meter to the Contour Next meter supplied by Medtronic. It is only until recently that AETNA started to approve the Contour Next glucose test strips through my insurance coverage.

So I have been using the ONETOUCH UltraMini for the last 5 years or so since it was the only meter that was fully covered by my insurance without a co-pay on my part.

The difference in readings was all over the place, but the only discernible pattern was that the Contour next Link 2.4 meter read consistently higher than the ONETOUCH UltraMini.

I personally think that the Contour Next is a more accurate meter (closer to the real blood glucose number) but the ONETOUCH UltraMini is more precise (multiple readings from one site are closer).

And this is important since the ONETOUCH UltraMini and ONETOUCH Verio’s superior precision is  key to reducing Auto Mode and sensor errors and especially eliminating the “BG Required Loop” that occurs in Auto Mode.