CGM and diving

[Sgtcongo]

I am type 1 Diabetic and have used Dexcom G6 for diving for the last few years with no issues. Both in Caribbean and in Lake Superior and other local lakes. I have been down to about 110 feet without issue. I am looking at moving to a Pump and was wondering if anyone on here has experience using a Medtronic CGM for diving and whether they have had any issues diving with it? It may be required based on which pump I go with. In particular the Guardian 4 CGM is what I'm looking at.

 

[Sgtcongo]

We make CGM systems (I was Chief Scientist when MiniMed got the first CGM approved by FDA). We routinely test them to the equivalent of 100 ft salt water to make sure there were no issues. The only issue might be if you were diving dry and you used nitrox to fill your suit. You might see a very small increase in glucose compared to 21% O2 since the enzyme everyone uses has oxygen as a reactant. But the effect will be pretty small maybe a 2% increase in estimated glucose.
Bill

Bill would you know if the Guardian™ 4 sensor would work for diving?

 

[bvanant]

Guardian should be fine. Is MDT still selling Guardian, I was under the impression that they were selling a custom version of Libre
Bill

 

[tridacna]

I am type 1 Diabetic and have used Dexcom G6 for diving for the last few years with no issues. Both in Caribbean and in Lake Superior and other local lakes. I have been down to about 110 feet without issue. I am looking at moving to a Pump and was wondering if anyone on here has experience using a Medtronic CGM for diving and whether they have had any issues diving with it? It may be required based on which pump I go with. In particular the Guardian 4 CGM is what I'm looking at.

Were you using a cover on the CGM while you dived?

 

[bvanant]

Well we took Libre 3 to 200 feet (in our chamber). Still works fine. If you are in a drysuit and using Nitrox your readings might be a bit low (a few percent).
Bill