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Patient RBCs tested with commercially prepared Patient plasma tested with commercially prepared Anti-A Anti-B A1 cells B cells 4+ 0 1+ 4+   Analyze and interpret the blood group typing results above for a 36-yr. old male patient. The test has been repeated tat the same results were obtained.  Identify this as a forward or reverse type discrepancy.  Next, indicate the most probable cause for the discrepancy, assuming there are not any technical or clerical errors, and the patient has not been recently transfused.  How would you attempt to resolve this discrepancy to confirm an ABO blood group type? Be specific in you answer.  Provide all test that would be performed as well as the expected results if your initial theory was correct.

A patient has a hemolytic transfusion reaction to red cells that were transfused 8 days ago.  What is the MOST likely cause of the reaction?

During a donor interview for apheresis platelet donation, the donor informs the interviewer that they have been taking aspirin daily for the past two years until discontinuing the medication one week ago.  What is the most appropriate course of action to take at the present time?

What type of blood (RBCs) would be selected for transfusion?  (Be sure to include ABO and D compatibility as well).

What principle/methodology is utilized when using the gold standard of test tube testing in the blood bank?

Which statement BEST describes the uniqueness of the red cell antigens in the Lewis blood group system?

An individual receives a massive transfusion in an emergency situation.  It is later determined that the patient is blood group B Positive but that was not known at the time of transfusion so they were transfused with group O RBCs and group AB plasma.  When may the patient be safely transfused with group B red cells?  (Note: a massive transfusion is defined as infusion, within a 24 hour period, of a volume of blood approximately equal to the recipient’s total blood volume)

A request is received to crossmatch five (5) units of RBCs on a man who is AB D positive and his antibody detection test is negative. Later, the man needs plasma.  What blood type(s) of FFP would be suitable for transfusion?

Red blood cells that have been leukoreduced must contain less than _____________ WBCs while retaining at least _______________ of the original red cells, respectively.

The immunodominant sugar responsible for the specificity of the A antigen is: