As any 670G user knows, it sometimes asks for multiple BGs back to back. I have noticed (or think I noticed, I haven’t actually kept track or done any details experimentation) that it is sometimes good to leave some time between the two tests to prevent it from trying to ask for even more. But I am not sure exactly how much time this should be (assuming that my theory is correct). Has anybody else noticed this, or even have any comments about the back to back requests?
It’s called the dreaded bg loop. If you ignore the alarm for at least an hour, but 2 hours works better, it will usually sort itself out.
There is a way to Help avoid this if the issue happens as it exits set up. If you notice as you exit set up the call for a blood sugar has 5 minutes. One way to help is to increase that for a few minutes or maybe an hour. Now I usually wait one period of 15 minutes and if it asks at the end of the 15 minutes i extend the time again and then enter it in a few minutes. It may ask as many as 8 or so times until it feels the calibration is both expected and accepted.
I cannot say this will solve the issue, but it will reduce the number of sticks. I agree it is a difficult issue.
Note: I am a Medtronic ambassador. My opinions are my own. They did not pay me to say nice things about Medtronic devices or the company. OK, they sent me a shirt and a cup but even I am more expensive than that. I can also say this is not an official Medtronic approach
Does anybody know a happy 670G user who has managed to bring his a1c to low levels?
If you frequent the 670G Facebook groups you’ll see plenty of complaints, but plenty of people who are happy with it as well. People do tend to be more vocal about things that are problematic or that they need help with; when things are going well there’s less motivation to talk about it.
All that said, I hope that Mdt is paying attention and looking at ways to make the next iteration more user friendly, especially as other pump makers move toward their own systems based around Dexcom 6 cgms. I imagine those systems will be more flexible regarding user control and input, since there’s a baseline of development and expectation laid down by the G5-based open source looping community. I suspect the locked-down approach has much to do with satisfying the FDA’s safety concerns, and may ease off as competition becomes a factor.
Yes, ME! Ever since I started using the 670G I have loved it, and even in the first week before starting Auto Mode I managed to bring my numbers down (or at some times of the day up, depending on what direction I needed to bring them). I had improvement almost immediately, so I would strongly recommend it.
And what is the improvement in a1c numbers, from what to what? Thanks!
I don’t know if this counts as I don’t use the 670G, but I use a 640G with sensor, and I went from an A1c of 62 mmol/mol to 44 mmol/mol in 2 months (7.8% to 6.2%). It’s because I often kept my BG rather high as I was always afraid of lows, because they give me migraines, but now the CGM stop the basal when it expects a low. I also switched to Fiasp from NovoRapid so my BG starts rising pretty quickly afterwards due to the shorter acting time of Fiasp.
My projected A1c seems to be lower still for the next blood test, because I spend a lot more time in range now. 
I don’t really know, since I only get an A1C number when I have bloodwork at my doctor appointments, but I do know that it will definitely be an improvement, and moving very quickly in the right direction, and isn’t the right direction always the goal?
No issues with Fiasp in the pump, I heard that it works fine in the beginning but then the efficiency fades out?
It’s takes a bit getting used to. Sometimes it works really well, and other times it’s a bit slow. It’s really important that your basal is right for it to work properly with meals.
It also, for me, works best when the doses aren’t too big, so it’s great on a low carb diet.
It get some local irritation as well, and yes, I do develop local insulin resistence if I keep the infusion site on for too long. But it isn’t too bad - it’s just good to be aware of it. 