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 A patient had a transfusion reaction. The technologist began the laboratory investigation of the transfusion reaction by assembling pre- and post-transfusion specimens and all paperwork and computer printouts. He checked the patient’s records and talked to the nurse in charge of the patient. What should he do first? 

  17. Name this blood vessel. 17[17] 18. Name this blood vessel. 18[18]

Units of A-negative, B-negative, and O-negative red blood cells are shipped to your transfusion service. What testing MUST be performed by your facility before placing these units into your inventory? 

The most common Rh haplotype among African Americans is 

An obstetric patient, 34 weeks pregnant, shows a positive antibody screen at the indirect antiglobulin phase of testing. She is group B, Rh negative. This is her first pregnancy. She has no prior history transfusion. What is the most likely explanation for the positive antibody screen? 

A complete Rh typing for antigens C, c, D, E and e revealed negative results for C, D, and E. How is the individual designated? 

In cases of ABO hemolytic disease of the newborn, the mother is usually what ABO blood type? 

 The system composed of antigens found primarily in secretions and adsorbed on the red blood cells  is 

In the antibody screening test, at what phase of reactivity is it most important to read the reactions for detection of clinically significant antibodies? 

Six units are crossmatched. Five units are compatible, one unit is incompatible, and the recipient’s antibody screen is negative. Identify the problem.