Every day is a challenge to isolate the variable. On July 4th, my blood sugar did not come below 370 all day. I was not stressed or sick.  I took correction after correction, but it would not budge.  I made an effort to eat less carbs in order to avoid a post-meal spike.  I changed my insulin and changed my set.  However, as I worked to eliminate any one particular cause of the spike, I never ever considered that my infusion set might not be venting properly.  (To be honest, I didn't really even know that my pump had a venting system!) 

There are a million reasons why my blood sugar might spike or crash unexpectedly, and, unfortunately, I think that I am really only aware of a few of them.  I can check my food, my site, my insulin, my stress levels, and my mood, but that's about it!  The recall reminded me how much is actually out of my control, and how it is impossible to know anything for sure when it comes to diabetes.  I feel like it is comparable to watching a movie without sound- you think you know what is going on, but you are only getting half of the information so you have to make a lot of assumptions.  When I am taking care of a blood sugar problem, there is no way around these "assumptions." I have to assume that my set is venting properly, that my equipment is sound, or I'll go crazy with uncertainty!  In the end, I just have to keep working down the list, eliminating the variables, and hope that I can isolate the one factor that caused such unexpected results.