Final answer:
A blood sample agglutinating with both anti-A and anti-B antibodies indicates a normal response for blood type AB. No error was made by the technician. The red tube is usually for serum chemistry tests and is sent to the chemistry lab section.
Step-by-step explanation:
When a technician observes agglutination in both the anti-A and anti-B wells during a blood type test, it indicates a normal response for a patient with type AB blood. The presence of agglutination in both wells means that the patient's red blood cells have both A and B antigens on their surface, which is characteristic of type AB blood. This type of blood is known as the universal recipient because individuals with this blood type can receive red blood cells from any ABO type.
This is a normal response for a person with blood type AB. In such a test, the red tube, typically associated with serum chemistry tests, contains a clot activator but no anticoagulant, and samples in the red tube are typically sent to the chemistry lab section.