I went to prime my tandem and I saw the insulin going up the tube, but it wasn’t coming out the needle!? I stoped it at 18 units (usually stop around 10-12) and took out the cartridge, put it back in (re loaded) and got a new tube out to prime, no issues. I don’t understand what happened. Do you think I’m safe using it as I have? I’m a little concerned that maybe I should have got a whole new cartridge too, but I’m out and about now and this thought just came to mind.

1 Like

That happened to me once too. Saw the insulin go up the tube but wouldn’t come out of the needle. If you’re not running high then I assume you’re okay by replacing the tube.


Cool thanks, makes me feel better. Also, I’m running entirely even still, so I’m pretty sure the solution worked:)