I started the 670G March 12 after 7 years of pumping on my Animas Ping. I ended up replacing my first pump 8 days later as I had 3 episodes where it appeared the pump failed to deliver basal insulin overnight. The first instance was 12 hours after a site change; the second was 24 hours after a site change and the third was the day after a site change. I also had one episode where it looked like the pump had stopped delivering basal but I bolused and was able to bring down the highs just as ketones started to appear. That was about 6 hours after a site change.
I am just one week into my second pump and today after a site change very clearly I wasn’t receiving basal insulin as 90minutes later my blood glucose went high and I had ketones. I changed out the site and it appeared fine - no kinks, no problems that were obvious - yet it seems there was some sort of full or partial occlusion. Because I do not take large amounts of insulin - 18 to 20 units per day of both basal and bolus insulin - it is unlikely there was enough pressure build up to cause the pump to alarm an occlusion (I have heard it is about 7 units). I am now wondering if the 4 other episodes I have had since March 12 were also partial or full occlusions. In 7 years of my Animas I never had a single occlusion or appearance of what could be an occlusion without a kinked or bent cannula so am concerned that this might be a serious problem with this pump. I am running in manual mode only and using my Dexcom for monitoring level directions. I never had ketones with my other pump except when I was sick and now in 3 weeks I have had 6 episodes of serious ketones. This is very concerning. I use the Mio injectors and use the same sites I have rotated through for years so that the same site does not get used more than once every 6 weeks (arms, legs, hips, buttocks). The site that just occluded was a brand new one I have never even used before. So, any suggestions about how to avoid occlusions, if they are common with the 670 G or the Mio set? Thanks! (It is enough to consider going back on MDI - 5 times near to hospitalization in 3 weeks is 5 times too many)!