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1. Titration techniques would be LEAST useful 5. Based upon observation of the following in: panel, the avidity of this antibody would be A. monitoring prenatal patients. reported as: B. detecting presence of antibodies. TUBE 1 2 3 4 5 6 8 9 10 C. identifying mixtures of antibodies. REACTION 4+ 3+ 2+ 1+ W+ 0 0 0 D. pretransplant testing of kidney recipients. TITER 8 16 32 64 128 256 512 1024 2. The equivalence zone occurs when: AVIDITY A. antigen is in excess. A. 12 B. antibody is in excess. B. 22 C. either antigen or antibody is missing. C. 30 D. antigen and antibody are in equivalent D. 37 concentrations. 3. Based upon observation of the panel below, 6. Observe the titration results from the first and what is the antibody titer if a doubling second visits of an obstetrical patient to her dilution was used in the procedure? physician and tell what the results indicate. TUBE 1 2 3 4 5 6 7 8 First Prenatal Visit 9 10 TUBE 4+ 3 2+ 1+ w+ 0 0 0 1 2 3 4 5 6 7 REACTION 0 0 9 10 REACTION 4+ 3 2+ 1+ W+ 0 0 0 0 A. 16 TITER 2 4 8 B. 32 16 32 64 128 256 512 1024 C. 64 Second Prenatal Visit D. 128 TUBE 1 2 3 4 5 6 7 8 9 10 REACTION 4+ 4+ 3+ 2+ 1+ W+ 0 0 0 0 4. Observation of the panel below indicates that TITER 2 4 8 16 32 the antigen and antibody concentrations fall 64 128 256 512 1024 within the: A. Danger to the baby is imminent B. Evidence of fetal-maternal hemorrhage TUBE 2 3 4 5 6 7 8 9 10 C. No evidence of further fetal-maternal REACTION 0 1+ 2+ 3+ 4+ 4+ 3+ 2+ 1+ 0 hemorrhage TITER 2 4 8 16 32 64 128 256 512 1024 D. Baby possesses the antigen Mom has A. Prozone produced antibody to B. Postzone C. Perizone 7. A master dilution is utilized in the titration D. Equivalence zone technique for the purpose of: A. decreasing analytical error in the procedure. B. comparing multiple samples from the same patient. C. increasing likelihood of detecting antibody presence D. comparing the reactivity of a single antibody against several red cell samples