MT AAB Immunohematology |220 questions and answers 2023.

All of the following blood donors would be permanently deferred except which one? 38yr old male who received rabies vaccine after a dog bite 3mos ago What is the interval blood donations? 8 weeks The oral temperature of a donor must not exceed which value? 37.5C 99.5F What is the minimum acceptable hemoglobin for blood donors? 12.5 g/dL for allogeneic donors What is the lowest acceptable hematocrit for allogeneic blood donors? 38% What donor meets the requirements for age, pulse, weight, and blood pressure? Age:32 Pulse:60 Weight(pounds):185 Blood pressure:110/70 How long must a pregnant woman be deferred? 6 weeks postpartum There is a 12-month deferment for each of the following donors except which one? 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? 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? no deferral as long as there is no abnormality All of the following are causes of permanent donor deferral except which one? incarcerated individuals What is the length of deferral for symptom-free donors immunized with oral polio, measles (rubeola), or mumps vaccine? 2 weeks Current testing on all donor blood must include testing for which of the following? serological test for syphilis Which one of the following tests is not required by AABB and is therefore optional during donor blood testing? anti-HBc What is a commonly used screening method for the detection of HIV-1 antibodies? enzyme-linked immunosorbent assays Currently required viral hepatitis marker tests include all of the following except which one? anti-HAV When color coding is used for donor blood labels, what color is group A? yellow Which infectious agent is least likely to be transmitted by a blood transfusion? HAV In the very acute phase of hepatitis, which one of the following positive tests would be indicative of onset of a viremic state? HBsAg During the "window period", what is the only marker of HBV infection? 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? 6 months Which viral agent causes the majority of cases of transfusion-associated hepatitis? HCV All of the following are required viral marker testing for the human immunodeficiency virus except which one? HIV-1 p24 antigen All of the following are required viral marker testing for the human immunodeficiency virus(3) anti-HIV-1, anti-HIV-2, anti-HTL V-I/II Which virus can be deadly to immunocompromised patients or premature infants? CMV All of the following organisms have been implicated in bacterial contamination of donor blood products except which one? Escherichia coli All of the following organisms have been implicated in bacterial contamination of donor blood products (3) Yersinia enterocolitica Citrobacter freundii Pseudomonas putida Which one of the following parasites has not been transmitted by blood transfusion? Naegleria What is the acceptable temperature range for a blood bank refrigerator? 1C - 6C According to FDA regulations, if blood is to be transported, then what temperature must be maintained during transportation? 1C - 10C What is the expiration date of red blood cells preserved with CPDA-1? 35 days What is the experation date of red blood cells preserved with ADSOL? 42 days What is the shelf life of cryoprecipitated antihemophilic factor when stored at -18C or lower? 1 year What is the shelf life of fresh frozen plasma that is stored at -18C or lower? 1 year What is the optimum temperature for thawing fresh frozen plasma? 30C - 37C What is the shelf life of platelet concentrates? 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? 24 hours Which biochemical change does not occur in stored blood? Plasma K+ decreases Which biochemical change occurs in stored blood? (3) plasma pH decreases plasma Na+ decreases 2,3-DPG decreases Which one of the following is not a labeling requirement of specimens for crossmatching? ordering physician All of the following statements concerning autologous transfusions are true except which one? There are no donor blood requirements for them In which autologous procedure is blood drawn and stored before the anticipated elective surgery? preoperative collection For autologous blood donations, blood should not be drawn from the donor-patient within how many hours before the anticipated operation or transfusion? 72 hours Which statement concerning the criteria for presurgical autologous donations is true? Donor hemoglobin must be at least 11.0 g/dL Which of the following pretransfusion tests must be determined for an autologous transfusion recipient? ABO/Rh testing What procedure involves the withdrawal of blood is to obtain plasma and subsequent reinfusion of the red blood cells into the donor? plasmapheresis Collection of plasma by pheresis more often than once every 8 weeks necessitates that which analyte(s) is(are) monitored at 4-month intervals? total protein After donating a unit of whole blood, how long must a donor wait before he/she is eligible for plateletpheresis? 72 hours