MMSC 420 Exam 2 (Already Graded A+)

What kind of specimen tube should we use for a DAT? correct answersPurple top, EDTA Which of the following would NOT be a patient that we would perform a DAT on? A: A patient with low Hgb and HCT levels but with no known bleeding B: A mother who has just given birth to a type O neg baby C: A patient exhibiting signs of an acute hemolytic transfusion reaction after receiving A pos RBCs from a donor D: A baby born to a mother who is type O correct answersB Does a positive DAT result means the patient's RBCs have a decreased lifespan? correct answersno A: Alloantibodies bound to transfused RBCs B: Autoantibodies to intrinsic red cell antigens C: Maternal antibodies that bind to fetal RBCs ALL cause correct answerspositive DAT How is the alternate pathway of the complement cascade activated? correct answersLiposaccharide on E. coli binds to C3 A: Newborn with O- mother B: Recently transfused patient with a positive DAT and a 1+ reaction in all antibody screening red cells including autocontrol C: Recently transfused patient with a hemolytic transfusion reaction ALL indicate correct answerselution needed How many IgG and IgM, respectively, would be required to activate the classical pathway for the complement cascade? correct answers2, 1 What is the order of complement activation in the classical pathway of the complement cascade? correct answersC1-C4-C2-C3-C5-C9 What test should be done as a reflex after a positive anti-PS DAT is observed in a 27 year old male? correct answersBoth anti-IgG and anti-C3bC3d should be run What test can be performed to identify ABO antibodies coating a baby's cells? correct answersLui Freeze Elution What is a distinguishing characteristic in intravascular hemolysis? correct answersHemoglobinuria If the DAT is positive but the IAT is negative, what describes the situation accurately? correct answersThere are more RBC antigen sites than antibodies