Exam (elaborations)
AAB (MT) 2024 Questions and Answers 2024
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Exam of 77 pages for the course AAB MT at AAB MT (AAB (MT) 2024)
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AAB (MT) 2024All of the following donors would be permanently deferred EXCEPT which one? -
answer38-year-old male who received rabies vaccine after a dog bite 3 months ago
All of the following donors would be permanently deferred: - answer75-year-old male
who had acute hepatitis 20 years ago following surgery, 19-y/o first-time donor who
received human growth hormone 12 years ago, and a 24-y/o donor with a history of a
positive test for Hepatitis C from another blood center.
What is the interval between blood donations? - answer8 weeks
The oral temperature of a donor must not exceed which value? - answer37.5 degrees C
What is the minimum acceptable hemoglobin for blood donors? - answer12.5 g/dL for
allogeneic donors
What is the lowest acceptable hematocrit for allogeneic donors? - answer38%
What donor meets the requirement for age, pulse, weight, and blood pressure? -
answerAge: 32, Pulse: 60, Weight (lb) 185, BP: 110/70
How long must a pregnant woman be deferred? - answer6 weeks postpartum
There is a 12-month deferment for each of the following donors: - answerDonor
received a blood transfusion, donor received a tattoo and body piercing, donor had sex
with a person with hepatitis.
There is a 12-month deferment for each of the following donors EXCEPT: -
answerDonor received the hepatitis B vaccine
How long must a prospective donor with a history of malaria be deferred? - answer3
years after cessation of treatment
A lab tech who has a positive tuberculin skin test wants to donate blood. If he/she meets
all the other criteria, how long is the deferral? - answerNo deferral as long as there is no
other abnormality
All of the following are causes of permanent donor deferral: - answerConfirmed HIV
positive, family history of Creutzfedt-Jakob disease, and intravenous drug user
,All of the following are causes of permanent donor deferral EXCEPT: - answerDonor
received the hepatitis B vaccine
Current testing on all donor blood must include testing for which of the following? -
answerSerological test for syphilis
Which one of the following tests is not required by AABB and is therefore optional
during donor blood testing? - answeranti-HBc
What is a commonly used screening method for the detection of HIV-1 antibodies? -
answerEnzyme-linked immunosorbent assays (ELISA)
Currently required viral hepatitis marker tests include all of the following: - answerAnti-
HCV, Anti-HBc, and HBsAg
Currently required viral hepatitis marker tests include all of the following EXCEPT: -
answeranti-HAV
When color coding is used for donor blood labels, what color is group A? -
answerYellow
Which infectious agent is least likely to be transmitted by a blood infection? -
answerHAV
In the very early acute phase of hepatitis, which one of the following tests would be
indicative of onset of a viremic state? - answerHBsAg
During the "window period," what is the only marker of HBV infection? - answerAnti-HBc
What is the minimum length of time that the patient's serum must remain positive for
HBsAg before the individual is referred to as a chronic carrier? - answer6 months
Which viral agent causes the majority of cases of transfusion-associated hepatitis? -
answerHCV
All of the following are required viral marker testing for the human immunodeficiency
virus EXCEPT which one? - answerHIV-1 p24 antigen
Which virus can be deadly to immunocompromised patients or premature infants? -
answerCMV
All of the following organisms have been implicated in bacterial contamination of donor
blood products EXCEPT which one? - answerEscherichia coli
All of the following organisms have been implicated in bacterial contamination of donor
blood products: - answerY. enterocolitica, C. freundii, and Pseudomonas putida
,Which one of the following parasites has NOT been transmitted by blood transfusion? -
answerNaegleria
Which parasites have been transmitted by blood transfusion? - answerBabesia,
Plasmodium, and Trypanosoma
What is the acceptable temperature range for a blood bank refrigerator? - answer1-6
degrees C
According to FDA regulations, if blood is to be transported, then what temperature must
be maintained during transportation? - answer1-10 degrees C
What is the expiration date of RBCs preserved with CPDA-1? - answer35 days
What is the expiration date of RBCs preserved with ADSOL? - answer42 days
What is the shelf life of cryoprecipitated antihemolytic factor when stored at -18 degrees
C or lower? - answer1 year
What is the shelf life of FFP that is stored at -18 degrees C or lower? - answer1 year
What is the optimum temperature for thawing FFP? - answer30-37 degrees C
What is the shelf life of platelet concentrates? - answer5 days at 20-24 degrees C with
constant agitation
If the hermetic seal on a unit of packed RBCs has been broken, how soon must the
product be used if stored in the blood bank refrigerator? - answer24 hours
Which biochemical change does NOT occur in stored blood? - answerPlasma K+
decreases
Which biochemical changes occur in stored blood? - answerPlasma pH decreases,
plasma Na+ decreases, and 2,3-DPG decreases
Which one of the following is NOT a labeling requirement of specimens for
crossmatching? - answerOrdering physician
The following are labeling requirements of specimens for crossmatching? -
answerCollection date, patient's name, hospital number
All of the following statements concerning autologous transfusions are true EXCEPT
which one? - answerThere are no donor blood requirements for them
, All of the following statements concerning autologous transfusions are true: -
answerThey prevent alloimmunization, they are the safest possible transfusions, and
they eliminate the risk of transfusion-transmitted infections.
In which autologous procedure is blood drawn and stored before the anticipated elective
surgery? - answerPreoperative collection
For autologous blood donations, blood should not be drawn from the donor-patient
within how many hours before the anticipated operation or transfusion? - answer72
hours
Which statement concerning the criteria for presurgical autologous donations is true? -
answerDonor hemoglobin must be at least 11.0 g/dL
Which of the following pretransfusion tests must be determined for an autologous
transfusion recipient? - answerABO/Rh testing
What procedure involves the withdrawal of blood to obtain plasma abd subsequent
reinfusion of the RBCs into the donor? - answerPlasmapheresis
Collection of plasma by pheresis more often than once every 8 weeks necessitates that
which analyte(s) is(are) monitored at 4-month intervals? - answerTotal protein
After donating a unit of whole blood, how long must a donor wait before he/she is
eligible for plateletpheresis? - answer72 hours
How long must a plasmapheresis donor wait before donating whole blood? - answer48
hours
What is the separation of WBCs by reversible filtration or centrifugation called? -
answerLeukapheresis
Different genes that occupy a specific locus of a chromosome are called: -
answerAlleles
Which description best describes an amorph? - answerGene with no directly observable
product
What term is used to describe two identical alleles at a particular locus? -
answerHomozygous
Which term best describes most blood group genes? - answerCodominant
Which term best describes the gene inheritance of most blood group systems? -
answerAutosomal codominant
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