This is part of what they say the problem with the insets are: "Too Much Insulin Can be Delivered ?Changes in air pressure could cause too much insulin to be delivered when using an infusion set that does not vent properly. ?A rapid change in air pressure may cause a significant over delivery of insulin that may not be detected until after it has occurred. ?Examples where an increase in altitude can change air pressure include when an airplane is taking off, and when traveling from sea level to a higher elevation, such as driving up a mountain." Go to the minimed site to find out more about the recall and what all the problems are. Going to a higher altitude place would make me nervous so I'd probably call minimed or whoever and ask them to overnight a new box or even a box of another type of set if they can't do the quicksets right now.