Which component is added after the blood has reacted in the first mixing step of the Ultra Tag method?

In the Ultra Tag method, the relevant process for tagging red blood cells involves a sequence of steps that require precision in timing and component addition. After the blood has reacted in the first mixing step, it is crucial to add the next component to facilitate optimal tagging of the cells using the radiolabeled agent.

The correct answer refers to the addition of Syringe 1 after the initial blood reaction. This step is essential because it typically contains a solution that supports the effective binding of the radiotracer to the red blood cells. By introducing this component at the correct time, the procedure ensures that the blood cells are adequately prepared for the subsequent steps that follow in the tagging process.

This precise order allows for maximizing the efficiency of the tagging, which is critical for the quality of the radiopharmaceutical product being created.