What is one advantage of the in vivo method of RBC tagging?

One significant advantage of the in vivo method of red blood cell (RBC) tagging is the absence of manipulation of blood samples outside the body. This technique allows for the direct labeling of the patient's own red blood cells while they remain within the circulatory system. This approach minimizes the risk of contamination or alterations that could occur during external handling and processing of blood samples. By performing the tagging in vivo, you ensure that the labeled cells closely resemble the natural state of the patient’s blood, which can enhance the reliability of the results obtained during imaging or diagnostic procedures.

Moreover, this method avoids potential complications associated with ex vivo practices, where blood is drawn, processed, and re-infused. As such, in vivo tagging can lead to a more straightforward and patient-friendly experience, ultimately benefiting diagnostic accuracy and patient safety.