Yes…just upgraded to the 522 from the 512…was really concerned when I looked down and saw “0” bars of insulin left, but obviously it still has volume because I can see it! I thought about calling MM…I hate this because I am always looking down at it and waiting for it to alarm! MM make the information more accurate…if you are going to provide it on the face of the pump!! By the way…the tubed pump design has all of us throwing away good insulin every time w/ make a set change…seems like there would be a better way? Especially since there are kids in LA dying because they do not have access to insulin…ok, sounds like that saying about cleaning your plate! but, it is true:) I am looking forward to trying out the small Solo pump including for this reason…did not like the size of the Omnipod. Wish someone would design and bring to market a tubeless, low profile, “skinned” pump…I might even do a fundraiser to get that pump!
And in answer to your last questions…I run the pump until it alarms…if I can (not going somewhere, etc.) I always store the sets in the fridge if I do not, so I can recover what would be lost insulin. You can remove it w/ a syringe…I always keep it for “back up” supply in a different labeled vial. Learned this technique from a doc/diabetic friend of mine who traveled to 3rd world countries. Good to know if you are in a remote location and cannot get insulin:) same thing applies if your insurance company will not approve another vial! Change my infusion site when I need to (1-2 times per week) and often re-use reservoirs. If I let the site in a little longer I usually know it…had to once when I was in Africa…and the site got red and BGs will always go up if the cannula gets plugged w/ tissue or insulin starts tunneling. Think about how long hospitals will leave an IV in your arm (directly into your circulatory system)…most of the clinical trials on the new generation pumps show cannula patency for upwards of a week…so, I see no problem w/ doing it if you test frequently and know how to manage sites. I think ideal would be changing it when it needs to be changed and heals quickly w/o scarring.