What method is most useful for detecting sample misidentification?

The choice of delta limit is particularly suitable for detecting sample misidentification because it involves monitoring significant changes in patient test results over time. Delta limits are established based on the physiological variability of an individual's test results, reflecting expected fluctuations that can occur in a healthy patient. When a test result deviates significantly from a previously established baseline, it can indicate possible issues such as sample misidentification, laboratory error, or a true change in the patient's condition.

In practice, if a patient's result suddenly changes beyond the predefined delta limit, it prompts a review of the sample identification process. This helps to catch potential misidentifications before they lead to incorrect clinical decisions. Delta limits are valuable in laboratory quality control, making them an essential tool for ensuring patient safety and accurate test interpretations.