Regarding this issue, this throws in an interesting wrinkle with panel cells. At our facility we also QC panel cells with regards to the CAP regulation cited, are all reagent cells QC'd each day of use. I know that there are many other facilities that don't QC panel cells each day of use because the commentary of this question only addresses A Cell, B Cell, Check Cells and Screening Cells. I wonder if we are going overboard or are we accomplishing the intent of ensuring that reagent cells are functioning properly.