A tube of blood that arrives in the laboratory without a label must be?

When a tube of blood arrives in the laboratory without a label, it poses a significant risk to patient safety and the integrity of the testing process. The absence of a label makes it impossible to ensure that the sample can be accurately linked to the corresponding patient or to track the results of any tests performed on that sample. Therefore, such a sample must be rejected automatically to prevent any mix-ups or errors in patient identification and test results.

Rejection is a necessary step to maintain the reliability of laboratory practices and to safeguard both the technician and the healthcare provider from potential legal and medical complications. Accepting an unlabeled sample could lead to administering the wrong treatment based on test results that cannot be accurately traced back to the right patient.