I fill my daughter's insulin pump cartridge with about 60 units and I am absolutely positive there are no air bubbles in the cartridge. I put the cartridge in the pump keeping the luer lock end pointing up so no air can enter and I prime the tubing with the cartridge upright.
Every time we go to change her cartridge, usually with about 8-10 units left, there are several air bubbles in that remaining insulin. I don't understand how they are getting in. I have to wonder if sometimes she doesn't get the correct dose because some air gets into the line.
Anyone else have this problem?