Guardian 3 Sensor Transmitter Guardian Sensor Medtronic MiniMed 670G Medtronic Oval Tape

Use Tegaderm Film in place of the Medtronic Oval Tape for the Guardian 3 or Enlite CGM Systems

Tegaderm Film to the Rescue

When I run out of the oval tape that comes with the Guardian 3 Sensors for the MiniMed 670G, the Tegaderm Film by 3M comes in very handy. I used these films for my Enlite sensor and the Medtronic MiniMd 530G.

The oval tape is a little complicated for me that I end up peeling the wrong side or get it all tangled up before applying it on my skin.

It seems as if I end up using an extra one during insertion and running out of the oval tape the tail end of my 3 moth supply.

Tagaderm Film by 3M purchased on Amazon

The Tegaderm Film comes in different sizes and works well in covering the sensor and making it water proof just like the oval tape.

This summer I tested out two sizes bought at Amazon.

The larger size Tagaderm film (4”x43/4”)worked well for when I had to jump into the pool with the kids but it covers such a large area.

I liked the assurance that the sensor was completely waterproofed over a large area.

With the larger Tegaderm Film you certainly do not need apply extra tape under the Transmitter.

The smaller sized Tegaderm Film (2.375”x2.75) fits the same as the oval tape.

The only downside to the Tegaderm Film is that it will peel off if you do not apply it firmly to your skin.

The films can be pricey at local Pharmacies but you should get very reasonable prices (no more than $.50 per tape) on Amazon or Ebay.

Guardian 3 Sensor Transmitter

BG Required Loop Issue now Resolved with New Enhanced Guardian 3 Transmitter

It has now been over three months since I received the enhanced Guardian transmitter to replace my first generation transmitter.

If you still have the first generation transmitter and are still fighting with the BG required loop issue contact your Medtronic educator to get the enhanced transmitter as soon as you can. It will save you a lot of grief.

Enhanced Transmitter Version for the Guardian 3 Sensor
The Enhanced Transmitter Version Number (Version 2.2) can be found under Status ->Sensor at the bottom.  

My initial thinking was that the Guardian 3 sensor transmitter was just a simple analog device that simply collected and sent analog data to the pump for post-processing conversion to digital data (data you see on your pump screen).

But I think there’s more to the transmitter, I think the circuitry is more complex and some of the calculations can be performed at the transmitter. This is great since that means Medtronic did not have to recall the pump to physically perform a hardware update to resolve this particular issue.

With the enhanced transmitter, the BG required loop that prevented one from entering Auto Mode is now completely resolved.

It also seems that the enhanced transmitter also handles data calibration differently and better.

The Medtronic 670G sensor calibration algorithm seems to behave very similarly now to the Calibration algorithm of the Dexcom 5 I used a couple years ago .

For example, the sensor readings seem to be averaged if the numbers between the sensor and the meter are not so close but not so varied.

In addition, if the number from the meter is so different from that of the sensor, the sensor will more readily default to the meter number more than before.

To request for the new enhanced transmitter follow this link.

I received the following message when my Diabetes educator ordered my enhanced transmitter.