The case
Imagine the following scenario in the laboratory: the telephone rings and you pick up the phone. The clinician or submitter tells you that he has the impression that the sodium levels have been reading higher for about a week. What steps will you take now to handle the complaint?
Typically, quality control data is used to assess the performance of your analytical system. A look at the data shows you that the controls used do not show any abnormalities - your device system is within the limits allowed by the RiliBÄK.
What now?
You can look at the sodium levels for all patients in the last week. For example, a daily mean or better median value of patient results can be calculated and, in fact, find that the values are higher overall than in the previous month.
What happened?
You have received a new reagent lot and have used it on your analyzer system.
