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ASCP BLOOD BANK EXAM RATED A.
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ASCP BLOOD BANK EXAM RATED A.
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ASCP BLOOD BANK EXAM RATED A. The use of the direct antiglobulin test is indicated in all the following EXCEPT: Correct Answer -Detection of alloantibodies in serum Which one of the following blood group systems may show a cell typing change during pregnancy? Correct Answer -Lewis What is the deferral period from donating blood for someone who is or has taken Tegison© for severe psoriasis? Correct Answer -Permanent deferral Both hemoglobinuria and hemoglobinemia will be present in what type of reactions? Correct Answer -Acute hemolytic transfusion reactions If the unit is going to be transfused within the collection facility, autologous blood must always be tested for which of the following before transfusion? Correct Answer -ABO, Rh Which of the following statements about high -frequency antigens is correct? Correct Answer -High -frequency antigens are common, but it is difficult to identify their corresponding antibodies. The immunoglobulin class responsible for the etiology of Hemolytic Disease of the Fetus and Newborn (HDFN) is: Correct Answer -IgG Before testing, all cord cells should be thoroughly washed in order to: Correct Answer -Remove Wharton's jelly An antibody screen utilizing polyethylene glycol (PEG) was performed. Reaction readings of this antibody screen are analyzed after immediate spin and again at 37°C incubation with subsequent centrifugation. How will the centrifugation of the tubes affect t he patient's results? Correct Answer -False positives may be seen Which best describes an A1 individual? Correct Answer -A and A1 antigens on RBCs and anti -B antibodies in serum. Platelet products will be prepared from a whole blood donation. What must be used to prevent potential contamination of the platelets with skin cells and bacteria? Correct Answer -Diversion pouch Which procedure used to obtain a fetal blood sample to monitor severity of hemolytic disease of the fetus and newborn (HDFN) can also be used to deliver intrauterine transfusions? Correct Answer -Cordocentesis One risk associated with patients that require chronic transfusions is: Correct Answer -Transfusion associated graft -versus -host disease (TA -GVHD) What is the principle of the Kleihauer -Betke test? Correct Answer -Fetal cells present in the mother's blood smear contain fetal hemoglobin (Hgb F). When treated with acid the fetal cells are resistant and will stain pink with the counter stain. The accepted interval between whole blood donations is: Correct Answer -
8 weeks How long after collection can a patient's sample be used for compatibility testing? Correct Answer -72 hours What is the rare phenotype found exclusively in male patients that is caused by X-linked inheritance from a carrier mother, often demonstrating a chronic but well -compensated anemia as well as muscle and nerve disorders? Correct Answer -McLeod Why is Rh immune globulin (RhIg) administered within 72 hours of delivery to an Rh negative mother if the newborn is found to be D -positive or weak -D positive? Correct Answer -Prevent fetal cells from initially sensitizing the mother Which of the following consequences of severe hemolytic disease of the fetus and newborn (HDFN) is most associated with neonatal death before or shortly after birth? Correct Answer -Cardiac failure Following a major trauma event, a family of four walks into your donor center hoping to donate blood. Which one of the following individuals may donate blood today? Correct Answer -A 22 -year -old woman using oral contraceptives. Which of the following is the most common type of autoimmune hemolytic anemia? Correct Answer -Paroxysmal cold hemoglobinuria.
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