ASCP MLS Practice Exam - Blood Banking QUESTIONS WITH ANSWERS

ASCP MLS Practice Exam - Blood |\ |\ |\ |\ |\ |\




Banking QUESTIONS WITH ANSWERS |\ |\ |\




Upon inspection, a unit of Apheresis Platelets is noted to have
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visible clots, but otherwise appears normal. The technologist
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should:
a) issue without concern
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b) filter to remove the clots
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c) centrifuge to express off the clots
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d) quarantine for Gram stain and culture - CORRECT ANSWERS
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✔✔D.
Clots indicate contamination.
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Which of the following transfusion reactions is characterized by
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high fever, shock, hemoglobinuria, DIC and renal failure?
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a) bacterial contamination
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b) circulatory overload
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c) febrile
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d) anaphylactic - CORRECT ANSWERS ✔✔A.
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In septic transfusion reactions, patients can experience fever,
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hypotension, and chills w/ shaking. |\ |\ |\ |\ |\




In severe reactions, patients can have shock, hemoglobinuria,
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renal failure, and DIC.
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,During storage, the concentration of 2,3-diphosphoglycerate (2,3-
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DPG) decreases in a unit of:
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a) platelets
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b) fresh frozen plasma
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c) red blood cells
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d) cryoprecipitated AHF - CORRECT ANSWERS ✔✔C.
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2,3-DPG declines during storage of Red Blood Cells, causing a
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"shift-to-the-left" in the oxygen dissociation curve and an
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impaired ability to deliver oxygen to the tissues.
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Which of the following would most likely be responsible for an
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incompatible antiglobulin crossmatch? |\ |\




a) recipient's red cells possess a low frequency antigen
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b) anti-K antibody in donor serum
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c) recipient's red cells are polyagglutinable
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d) donor red cells have a positive DAT - CORRECT ANSWERS
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✔✔D. |\




Since crossmatching is a test between the patient's plasma and
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donor's cells, any incompatibility is due to the donor's red cells. If
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a patient is negative for clinically significant antibodies to
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common antigens, an incompatible unit by the antiglobulin test is
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due to either a positive DAT on the donors red cells or the
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patient has an antibody to a low-incidence antigen that the
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donor's cells possess. |\ |\




A woman types as Rh-positive. She has an anti-c titer of 32 at
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AHG. Her baby has a negative DAT and is not affected by
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,hemolytic disease of the newborn. What is the father's most
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likely Rh phenotype?
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a) rr|\




b) r"r
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c) R1r
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d) R2r - CORRECT ANSWERS ✔✔C.
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The baby appears to lack c since no HDFN was evident. The mom
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is most likely R1R1, so had to pass R1 onto the baby. The father
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must have passed on an Rh gene that also did not produce c.
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Given the choices, the father has to be R1r.
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The purpose of performing antibody titers on serum from an
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immunized, pregnant woman is to: |\ |\ |\ |\




a) determine the identity of the antibody
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b) identify candidates requiring additional fetal monitoring
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c) decide if the baby needs an intrauterine transfusion
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d) determine if early induction of labor is indicated - CORRECT
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ANSWERS ✔✔B. |\




Antibody titers do not themselves predict the severity of HDFN or
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determine the treatment needed. Instead, titers above a critical
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level identify candidates requiring additional monitoring to
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determine necessary intervention. |\ |\




When platelets are stored on a rotator set on an open bench top,
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the ambient air temperature must be recorded:
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a) once a day
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b) twice a day
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, c) every 4 hours
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d) every hour - CORRECT ANSWERS ✔✔C.
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If storage devices do not have automated temperature recording,
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ambient temperature must be monitored and recorded every 4
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hours.


An individual has been sensitized to the k antigen and has
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produced anti-k. What is the most probable Kell system
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genotype?
a) KK |\




b) Kk |\




c) kk |\




d) K0K0 - CORRECT ANSWERS ✔✔A.
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This individual cannot have the k antigen on their cells. K0K0 is
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rare and no Kell system antigens are detected on the red blood
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cells. Those individuals usually produce antibodies that are
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reactive with all normal cells. KK is the most probable genotype.
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The transport temperature for Red Blood Cells Leukocytes
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Reduced is: |\




a) 1-6 C |\ |\




b) 1-10 C |\ |\




c) 18-20 C|\ |\




d) 20-24 C - CORRECT ANSWERS ✔✔B.
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The transport temperature for all red cell blood products is 1-
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10°C.