Final answer:
In a normal case, agglutination in both wells after adding anti-A and anti-B antibodies indicates AB blood type. Patient identification is crucial to prevent mix-ups. In emergencies, type O negative blood is used for transfusions if there's no time for cross-matching.
Step-by-step explanation:
When a lab technician adds anti-A and anti-B antibodies to a patient's blood sample and observes agglutination in both wells, this indicates that the red blood cells have both A and B antigens on their surfaces. This is a normal response for someone with AB blood type. In the scenario described, the patient's blood agglutinating when mixed with both anti-A and anti-B serum suggests that they have AB positive or AB negative blood type, depending on the presence or absence of the Rh factor. No error was made by the technician in this procedure. Moreover, during a blood draw it is crucial to verify the patient's identification to ensure accurate labeling and prevent potential mix-ups that can lead to serious medical errors, such as conducting the wrong procedure or administering incorrect treatments.