SBB Human Blood Groups Exam Questions with Correct Answers

SBB Human Blood Groups Exam Questions with Correct Answers How would Ulex europaeus react with O, A, A2, B, A2B, A1B RBCs? - Answer-OA2BA2BA1A1B How could you distinguish serologically A1, A2 and A3 - Answer-Dolichos biflorus can will react with A1 and not A2. A3 yields mixed field reactions with anti-A and anti-A,B What is the correct order of type of RBCs to transfuse in an AB patient when AB RBCs are not available? Why? - Answer-A, B, O; the residual anti-B in A RBCs is less immunogenic than the residual anti-A in B RBCs What type of RBCs would you transfuse to a patient with anti-G - Answer-RBCs transfused must lack the D and C antigens Can you detect a weak D using Gel Technology? - Answer-No, because there is no washing phase Can an Rh positive father and Rh positive mother yield an Rh negative child - Answer-Yes, if both parents are heterozygous for the D gene. Inheritance is autosomal recessive What type of RBCs in regards to Rh phenotype would you transfuse in a patient with anti-f - Answer-RBCs should be negative for the c and e antigens How could you solve an ABO discrepancy where Anti-M was causing aberrant results in reverse grouping when the forward type is consistent with A blood group and reverse as O? - Answer-Treat A1 cells with ficin to denature the M antigen, repeat reverse grouping with ficin-treated A1 cells. Why do you see an anti-N like specificity in dialysis patients? - Answer-Formaldehyde induced antibody to 'N' due to formaldehyde used in dialysis procedures.