We decided with the last pump site change to leave the insulin in the reservoir, even though there were only 29 units left. He now has 7 units left in his reservoir and he’s running high and we’re wondering if the boluses are actually going through.
I’m wondering – does the Medtronic 722 deliver the last few units of insulin in the reservoir, or does it stop delivering when you just have 10 or 20 units left? I can’t seem to find anything in the pump manual to clarify. I assumed that it stopped when it was absolutely dry, but maybe that’s not right.
I have a t:slim pump & have gone to zero a couple of times. I have not noticed anything wrong when i get below a certain number of units left. For me, it’s more of an alert so i don’t run out. I would think your pump would tell you it’s not delivering, kinda like when you disconnect.
Maybe someone else with your pump will answer soon. Hang in 
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Wish I could answer this specifically, but I can say that I routinely run my Omnipod down, and I find it’s mostly been good to the last drop.
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I have a Medtronic Revel pump and i have found that once i get below 10 units, my BGs trend up. but, when the LOW INSULIN alarm comes up, it means i have about 20 units left in my reservoir, so i don’t bother changing it right away…unless of course, if i am planning on doing a dual bolus that requires more than usual amount of time to finish pumping (for example, if i program my pump to deliver my insulin over an extended 3 hour period, i will change my reservoir, even if i have plenty on board. i know that i could get away with it, but i get anxious that i might forget and then run dry.)
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