We just started pumping 11/07 and luckily have only had one bad sight. Until today that is...I was bolusing DD for lunch and got a blockage detected alarm at almost the end of the bolus. I disconnected the site and there was a quite a large drop of insulin on the needle. I primed the line to make sure there were no bubbles in the line and then reconnected. I resumed the bolus and it finished without another alarm. I waited about an hour and checked her BG and it was elevated so to be on the safe side I went ahead and changed the site. What do you think happened? Air bubbles or what?