OK, after nearly a month of pumping, my husband and I were discussing a few days ago how odd it is that you don't have to "prime" the tube that goes from the pump into the body, but we do prime the tube that goes from the pump outwards. We're using a MiniMed pump with the Sure-T infusion sets. I know that's not very clear. I'm talking about when we refill the pump with insulin, we push "prime" and wait until we see insulin coming out of the end of the tubing before attaching it to the connector piece... which then connects to another piece of tubing. It's the second piece of tubing that we never push the air out of that is our concern. (Hmmm... I'm not sure that's any more clear!) So, now that it's in my head, I can't get it out... isn't there a risk of getting an air bubble into the body this way?