What is the correct follow-up if a patient's type shows a discrepancy in agglutination patterns?

In cases where a patient's blood type shows discrepancies in agglutination patterns, confirming the results with another testing method is the most appropriate follow-up. Discrepancies can arise due to various factors such as weak antigen expression, low antibody levels, or technical issues. Therefore, confirming with an alternative method—such as using different reagents or testing techniques—provides additional assurance regarding the accuracy of the blood type determination.

While drawing a new blood sample can sometimes be helpful, it does not address the underlying issue immediately, and it might yield similar results if the problem stems from factors like low antibody levels or a laboratory technical error. Performing additional antibody identification could also help clarify the situation, but it may not be necessary unless the initial typing results are confirmed to be incorrect. Thus, the option to confirm with other methods is a direct approach to resolving the discrepancy before considering other interventions.