MT AAB Immunohematology
All of the following blood donors would be permanently deferred except which one? -
ANS-38yr old male who received rabies vaccine after a dog bite 3mos ago
What is the interval blood donations? - ANS-8 weeks
The oral temperature of a donor must not exceed which value? - ANS-37.5C 99.5F
What is the minimum acceptable hemoglobin for blood donors? - ANS-12.5 g/dL for
allogeneic donors
What is the lowest acceptable hematocrit for allogeneic blood donors? - ANS-38%
What donor meets the requirements for age, pulse, weight, and blood pressure? -
ANS-Age:32
Pulse:60
Weight(pounds):185
Blood pressure:110/70
How long must a pregnant woman be deferred? - ANS-6 weeks postpartum
There is a 12-month deferment for each of the following donors except which one? -
ANS-deferment: (1)donor received a blood transfusion (2)donor received a tattoo and
body piercing (3) donor had sex with a person with hepatitis
except: donor received the hepatitis B vaccine
How long must a prospective donor with a history of malaria be deferred? - ANS-3 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? - ANS-no deferral as long as there is no
abnormality
All of the following are causes of permanent donor deferral except which one? -
ANS-incarcerated individuals
What is the length of deferral for symptom-free donors immunized with oral polio,
measles (rubeola), or mumps vaccine? - ANS-2 weeks
,Current testing on all donor blood must include testing for which of the following? -
ANS-serological test for syphilis
Which one of the following tests is not required by AABB and is therefore optional
during donor blood testing? - ANS-anti-HBc
What is a commonly used screening method for the detection of HIV-1 antibodies? -
ANS-enzyme-linked immunosorbent assays
Currently required viral hepatitis marker tests include all of the following except which
one? - ANS-anti-HAV
When color coding is used for donor blood labels, what color is group A? - ANS-yellow
Which infectious agent is least likely to be transmitted by a blood transfusion? -
ANS-HAV
In the very acute phase of hepatitis, which one of the following positive tests would be
indicative of onset of a viremic state? - ANS-HBsAg
During the "window period", what is the only marker of HBV infection? - ANS-Anti-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? - ANS-6 months
Which viral agent causes the majority of cases of transfusion-associated hepatitis? -
ANS-HCV
All of the following are required viral marker testing for the human immunodeficiency
virus except which one? - ANS-HIV-1 p24 antigen
All of the following are required viral marker testing for the human immunodeficiency
virus(3) - ANS-anti-HIV-1, anti-HIV-2, anti-HTL V-I/II
Which virus can be deadly to immunocompromised patients or premature infants? -
ANS-CMV
All of the following organisms have been implicated in bacterial contamination of donor
blood products except which one? - ANS-Escherichia coli
, All of the following organisms have been implicated in bacterial contamination of donor
blood products (3) - ANS-Yersinia enterocolitica
Citrobacter freundii
Pseudomonas putida
Which one of the following parasites has not been transmitted by blood transfusion? -
ANS-Naegleria
What is the acceptable temperature range for a blood bank refrigerator? - ANS-1C - 6C
According to FDA regulations, if blood is to be transported, then what temperature must
be maintained during transportation? - ANS-1C - 10C
What is the expiration date of red blood cells preserved with CPDA-1? - ANS-35 days
What is the experation date of red blood cells preserved with ADSOL? - ANS-42 days
What is the shelf life of cryoprecipitated antihemophilic factor when stored at -18C or
lower? - ANS-1 year
What is the shelf life of fresh frozen plasma that is stored at -18C or lower? - ANS-1
year
What is the optimum temperature for thawing fresh frozen plasma? - ANS-30C - 37C
What is the shelf life of platelet concentrates? - ANS-5 days at 20C - 24C with constant
agitation
If the hermetic seal on a unit of packed red blood cells has been broken, how soon must
the product be used if stored in the blood bank refrigerator? - ANS-24 hours
Which biochemical change does not occur in stored blood? - ANS-Plasma K+
decreases
Which biochemical change occurs in stored blood? (3) - ANS-plasma pH decreases
plasma Na+ decreases
2,3-DPG decreases
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