Does anyone have experience with minimed 670g pump?


Your experience mirrors my own and I’ve been on the 670G only a few weeks (moved from an ageing ACCU-Chek Aviva Combo). My only annoyance is wearing the pump. I was provided with a belt clip which means the top of the pump pokes me in the stomach while sitting. The clip is a challenge to remove from belts and clothing. I have resorted to carrying it around in my hand like a smartphone.


Yes!! @EMY92, I had that yesterday. 4 calibrations within the first hour after a sensor change and then one more the hour after that. @Rphil2, yes warm-up completed successfully, and yes, the transmitter was charged fully and yes, everything is back to normal today.


The only fix is to goto manual mode for a few hours then go back to auto. They still haven’t fixed this problem.


Good Morning,
My review of the Medtronics 670g. I have much better control using the pump in manual mode and using the Dexcom G6. Here is what I posted-Hope it helps.

I wanted to share my thoughts on the 670G. I started with the T-slim about 1 1/2 years ago. Right after I started on the T-Slim (Taking 180 units per day) I figured out how much I absolutely hated having the tube and switched over to Omnipod with the Dexcom 4G. I then was able to upgrade the Dexcom to the 5G. I absolutely loved the freedom Omnipod gave me and the Dexcom was perfect. When the Medtronics 670G came out, I was fortunate enough to switch at the beginning of this year when the sensors came off back order. I changed over because I actually had the stomach sleeve and knew my insulin needs would be changing drastically. I did not want to worry about my BG dropping out at 3am (which it had been dropping to 40 at 3am). I am sad to say, after I tried for 6 months, I am changing back to the Dexcom 6G. I have had nothing but issues with the 670G. I have had to have the pumps replaced, the transmitter replaced, and at least 75% of the sensors did not work and had to be exchanged. When everything worked, which was not very often, it was great to let the pump do all the work- delivering micro boluses ever 5 minutes based on your CGM reading. However, the sensors in auto mode proved not to be very accurate, if they even worked. I also had issues where the pump would prompt me at all hours for a BG reading, which defeated the purpose of changing to that pump to do away with the 3am dropping of BG and waking up to an alarm. It would prompt for a BG if you were stable for 2 hours, if you were low, if you reached your max bolus for that segement, and a known issue of prompting after the pump ran diagnostics at 1am. I also must mention that the Medtronics has a hard coded limit of a target BG of 120. I like to keep my target at 100. I also found that the transmitter did not work in the pool. I even had the transmitter right on top of the pump and right at the surface if the water. The pump then complained that it could not find the signal and took about 20 min after getting out of the pool to sync back up. The dexcom worked when I went swimming. I would change back to my Omnipod, but because I was fortunate to have good insurance, I gave it to another type 1 that their insurance refused to cover one for them after trying to get it approved for over 1 year. I was paying it forward and no…I do not regret that decision at all.

I also want to mention 2 additional things. I am not sure who designed the inserter, but the taping of the sensor is ridiculous. I have never seen anything so poorly designed. You have to use one piece of tape to anchor the sensor and then do this complex taping. I found that if you just use tegaderm (like they use for Iv’s in the hospital) it does a much better job and will last longer. You also have to charge the transmitter (about 30min) between each use. AND, Medtronics currently does not have a phone app. So no family circle alerts and you will need the tiny CGM graph on the pump display…not sure how the older patients will feel about that.

One last note, Medtronics has done some very underhanded things with the billing. They ran my insurance before sending me the pump and said everything was covered, then the insurance denied the transmitter (because it was too soon to get one-a mistake I could have cleared up with insurance if medtronics would have let me know) and they then billed the $800 to me! So now I am in a battle with them, even though their own sales rep agrees I should have never been sent the transmitter if it was not covered and did not give my approval to bill me. They placed my account on hold and will not send any supplies, forcefully trying to get me to pay for the transmitter. I will be changing back to my TSlim. when my on hand supplies are exhausted. AND…My A1C actually went up while on the Medtronics system.

In case you are curious, I am doing excellent after the stomach sleeve. I went from 180 units per day to currently being on 17 units per day. I have lost almost 60 pounds in 6 months. I am a type 1.5, so I will always be on the insulin pump, but being that I am in the medical field and have heard cardiologist give the “DM? High cholesterol? Over weight?” speech to 30 patients a day for years, I knew I needed to get my insulin needs to as minimal as possible. Of course, you would need to talk to your doctor to see if that would be a good option, and it took 12 months of being under the surgeon’s care just to get the procedure approved, but for me…it added many years to my life (hopefully).

Thank you for reading this! I will be comparing the Medtronic sensor readings to the Dexcom 6 in the next few days just out of curiosity. Yes, I am that geeky! Come back if you are interested in seeing my findings. Good day!!!


I hate this thing. I’ve had it since May 2018. The Guardian CGMS is never accurate and sensors fail often. 670G alerted that my BG was low (75). I tested and my BG was actually 139. 30 minutes later, the 670G alerted “BG” required. Tested again. 20 minutes later, 670G alerts “Calibration required”. Tested again and then called tech support. They want to replace my sensor. 4th replacement in less than 6 weeks. I never had these issues with my Dexcom G4 or G5.

Excellent review of the 670G by Gary Scheiner (Integrated Diabetes Services):



If you have not tried it as yet, place the sensor on your upper arm It made all the difference for me

Note: I am a Medtronic ambassador. My opinions are my own. They did not pay me to say nice things. OK, they sent me a shirt and a cup but even I am more expensive than that.


Just curious how you put it in your arm one handed with all the taping requirements? I mean I get I can use the inserter one handed but haven’t figured out a way to tape it down one handed.


here are a couple of videos.

To do it by yourself it takes practice. Thankfully my wife helps me out.

Note- I am a Medtronic ambassador. My opinions are my own. They did not pay me to say nice things. OK, they sent me a shirt and a cup but even I am more expensive than that.


My pump trainer said to wait for a while before giving the pump a BG test. She said sometimes the rapid rise or fall will level out and it won’t need it anymore. So wait about 30 minutes before testing for a BH alert. Also if you overload the pump with info, calibration, BG, and bolus all at the same time will do this a lot, it sends the pump into a loop and it needs time to reset. Again, you want to wait for approximately 30 minutes. Don’t wait longer than an hour because it will kick you out of aitomode, of course you get an alert about that too, so you can enter again anyway…but that’s what I was told.

I’ve had my 670G a year. I struggled with making the automode settings work for me, but wasn’t seeing an endocrinologist regularly due to rural location, we’ve since moved and I have local specialists. My pump had a major malfunction after about 8 months. The keys stopped working. They had to overnight a replacement. I’ve had that happen with pumps from MM before, but it alarmed me that it happened within the first year. All in all, it’s good. My a1c was 6.5 without many lows at all, so that’s fantastic. Also the minimal lows have brought back my hypo awareness. I’ve had T1 for 28 years and stopped sensing lows about 10 years ago.


It made no difference for me. 3rd failed sensor in 5 weeks. Also, what @Sam_I_am1 asked. My wife has become involved in putting in the sensor in the arm. Good thing I ONLY do my sensor changes on the weekend.


What does that mean? Are you suggesting that if the pump is asking for a BG test or a calibration that the use should ignore the request and wait 30 minutes?


My trainer helped me with my first arm sensor. Worked the full 7 days but I didn’t like how the edges of the tape came loose as my shirt moved. Today she suggested using my thigh. I did a little web search on it…might be a suggestion for you Khurt.



I called Medtronic. They did not recommend using my thigh. They stated that, for adult patients, the sensor has been approved for use in the arm and stomach only. Which means, it will be recorded at patient error if a sensor fails if you use it anywhere but those two place. YMMV.