AAB MT IMMUNOHEMATOLOGY ELABORATED QUESTIONS WITH REVIEWED ANSWERS 2023/2024

AAB MT IMMUNOHEMATOLOGY ELABORATED QUESTIONS WITH REVIEWED ANSWERS 2023/2024 All of the following blood donors would be permanently deferred except which one? - CORRECT ANSWER-38yr old male who received rabies vaccine after a dog bite 3mos ago What is the interval blood donations? - CORRECT ANSWER-8 weeks The oral temperature of a donor must not exceed which value? - CORRECT ANSWER37.5C 99.5F What is the minimum acceptable hemoglobin for blood donors? - CORRECT ANSWER12.5 g/dL for allogeneic donors What is the lowest acceptable hematocrit for allogeneic blood donors? - CORRECT ANSWER-38% What donor meets the requirements for age, pulse, weight, and blood pressure? - CORRECT ANSWER-Age:32 Pulse:60 Weight(pounds):185 Blood pressure:110/70 How long must a pregnant woman be deferred? - CORRECT ANSWER-6 weeks postpartum There is a 12-month deferment for each of the following donors except which one? - CORRECT ANSWER-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? - CORRECT ANSWER-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? - CORRECT ANSWER-no deferral as long as there is no abnormality All of the following are causes of permanent donor deferral except which one? - CORRECT ANSWER-incarcerated individuals What is the length of deferral for symptom-free donors immunized with oral polio, measles (rubeola), or mumps vaccine? - CORRECT ANSWER-2 weeks Current testing on all donor blood must include testing for which of the following? - CORRECT ANSWER-serological test for syphilis Which one of the following tests is not required by AABB and is therefore optional during donor blood testing? - CORRECT ANSWER-anti-HBc What is a commonly used screening method for the detection of HIV-1 antibodies? - CORRECT ANSWER-enzyme-linked immunosorbent assays Currently required viral hepatitis marker tests include all of the following except which one? - CORRECT ANSWER-anti-HAV When color coding is used for donor blood labels, what color is group A? - CORRECT ANSWER-yellow Which infectious agent is least likely to be transmitted by a blood transfusion? - CORRECT ANSWER-HAV In the very acute phase of hepatitis, which one of the following positive tests would be indicative of onset of a viremic state? - CORRECT ANSWER-HBsAg During the "window period", what is the only marker of HBV infection? - CORRECT ANSWER-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? - CORRECT ANSWER-6 months Which viral agent causes the majority of cases of transfusion-associated hepatitis? - CORRECT ANSWER-HCV All of the following are required viral marker testing for the human immunodeficiency virus except which one? - CORRECT ANSWER-HIV-1 p24 antigen All of the following are required viral marker testing for the human immunodeficiency virus(3) - CORRECT ANSWER-anti-HIV-1, anti-HIV-2, anti-HTL V-I/II Which virus can be deadly to immunocompromised patients or premature infants? - CORRECT ANSWER-CMV All of the following organisms have been implicated in bacterial contamination of donor blood products except which one? - CORRECT ANSWER-Escherichia coli All of the following organisms have been implicated in bacterial contamination of donor blood products (3) - CORRECT ANSWER-Yersinia enterocolitica Citrobacter freundii Pseudomonas putida Which one of the following parasites has not been transmitted by blood transfusion? - CORRECT ANSWER-Naegleria What is the acceptable temperature range for a blood bank refrigerator? - CORRECT ANSWER-1C - 6C According to FDA regulations, if blood is to be transported, then what temperature must be maintained during transportation? - CORRECT ANSWER-1C - 10C What is the expiration date of red blood cells preserved with CPDA-1? - CORRECT ANSWER-35 days What is the experation date of red blood cells preserved with ADSOL? - CORRECT ANSWER-42 days What is the shelf life of cryoprecipitated antihemophilic factor when stored at -18C or lower? - CORRECT ANSWER-1 year What is the shelf life of fresh frozen plasma that is stored at -18C or lower? - CORRECT ANSWER-1 year What is the optimum temperature for thawing fresh frozen plasma? - CORRECT ANSWER-30C - 37C What is the shelf life of platelet concentrates? - CORRECT ANSWER-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? - CORRECT ANSWER-24 hours Which biochemical change does not occur in stored blood? - CORRECT ANSWERPlasma K+ decreases Which biochemical change occurs in stored blood? (3) - CORRECT ANSWER-plasma pH decreases plasma Na+ decreases