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MLT

BLOOD BANK

QuestionAnswer
Following plasmapheresis, how long must a person wait before being eligible to donate a unit of whole blood? 48 hours
Each unit of whole blood will yield approx. how many units of cryoprecipitated AHF? 80
Addition of what will enhance the shelf-life of whole blood? adenine
The optium storage temp for Cryoprecipitated AHF is...? -20 degree C
The optimum storage temp for Platelets is? 22 degrees C
The optimum storage temp for Red Blood Cells, Frozen is...? -80 degrees C
Platelets prepared in a polyolefin type container, stored at 22-24 degrees celcius in 50 ml of plasma and gently agitated can be used for up to ...? 5 days
The enzyme responsible for conferring H activity on the red cell membrane is alpha- L-fucosyl transferase
What is the proper prodedure for preparation of Platelets from whole blood? Light spin followed by a hard spin
Following the second spin in the preparation of Platelets, the platelets should be: allowed to sit undisturbed for 1 hour
Anti-Sda is strongly suspected if... the agglutinates are mixed-field and refractile
In suspected cases of hemolytic disease of the newborn, what significant information can be obtained from the baby's blood smear? determination of the presence of sperocytes and elevated numbers of nucleated red blood cells
As a preventive measure against graft-versus-host disease, red blood cells prepared for infants who have received intrauterine transfusions should be... irradiated
Anti-Fya is.. capable of causing hemolytic transfusion reactions
Cells of the A3 subgroup will: give a mixed field reaction with anti A,B
Mixed-field agglutionation at the anti-human globin phase of a crossmatch may be attributed to: an antibody such as anti-Sda
When the main objective of an exchange transfusion is to remove the infants antibody-sensitized red blood cells and to control hyperbilirubinemia, the blood product of choice is ABO compatible: Fresh Whole Blood
Acccording to AABB standards, 75% of all platelet, phresis units tested shall contain how many platelets per ul: 3.0 times 10 to the eleventh
The purpose of a low-dose irradiation of blood components is to: prevent graft-versus-host (GVH) disease
The most effective component to treat a patient with fibrinogen dificiency is: cryoprecipitated AHF
The approx. percentage of the original plasma content of factor VIII recovered in cryoprecipitated AHF is: 40%-80%
A solution of gamma globulins containing anti-Rh (D) is given to an Rh (D) negative mother to: Prevent fetal cells from initially sensitizing the mother
What is Coombs sera comprised of: Anti-human globulins
A newborn demonstates petechiae, ecchymosis, and mucosal bleeding. the preferred blood component for this infant would be: Platelets
A 65 year old woman experienced shaking, chills and fever of 103 approx 40 min following the transfusion of a second unit of rbc's. the most likely explanatio for the patient's symptoms is: severe febrile transfusion reaction
The Liley method of prediction the severity of hemolytic disease of the newborn is based on the amniotic fluid: change in optical densiy measured at 450 nm
A unit of FFP was inadvertently thawed and then immidiately refrigerated at 4 degrees celcius on Monday. On Tues evening this unit may still be transfused as a replacement for: factor IX
Use of EDTA plasma prevents activation of the classical complement pathway by: cheleting Ca++ ions, which prevents assembly of Cl
The most effective component to treat a patient with fibrinogen deficiency is: cryoprecipitated AHF
What blood component must be prepared within 8 hours after phlebotomy? fresh frozen plasma
Although ABO compatibiity is preferred, ABO incompatible product may be administered when transfusion? Cryoprecipitated AHF
What is the best source of Factor IX? Prothrombin complex
Coughing, cyanosis, and difficult breathing are symptoms of what kind of transfusion reaction? circulatory overload
Hypotension, nausea, flushin, fever and chills are symptoms of which trasfusion reaction? hemolytic
Hives and itching are symptoms of which transfusion reaction? allergic
Hemoglobinuria, hypotension and generalized bleeding are symptoms of which transfusion reaction? hemolytic
Fever and chllls are symptoms of which transfusion reaction? febrile
Cold agglutinin syndrome is best associated with which blood group? I/i
Antibodies involved in warm autoimmune hemolytic anemia are often associated with which blood group system? Rh
A method currently in routine use for freezing Red Blood Cellss is: high concentration of glycerol (40% w/v)
Rejuvenation of a unit of Red Blood Cells is a method used to : restore 2,3 DPG and ATP to normal levels
Cryoprecipitated AHF,if maintained in the frozen state at -18 degree C or below, has a shlelf life of: 12 months
The quality assurance program for Red BLood Cells, Deglycerolized should include regularly scheduled monitoring to determine: acceptable glycerol removal
What is an example of polyagglutinable red cells: are agglutinated by most adult sera
Tn(polyagglutinable) activation may lead to an : abo descrepancy caused by problems with the patients red blood cells
Mixed field agglutination encountered in ABO groupin would most likely be due to: A3 red cells
The use of leukocyte-depleted RBC's and Plt Concentrations is indicated for which patient group: patients with history of febrile transfusion reaction
Blood selected for exchange transfusion must: lack red blood cell antigens corresponding to maternal antibodies
ABO-hemolytic disease of the newborn: is usually seen only in the newborns of group O mothers
While performing routine postpartum testing for an Rh immune globulin (RhIg) candidate, a weakly positive antibody test was found. Anti-D was identified. This antibody is most likely the result of: antenatal administration of RhIg at 28 weeks gestation
A blood component used in the treatment of hemophilia A is: Factor VIII concentrate
A 24 yr old with hemophilia is involved in an auto accident and is actively bleeding. Factor VIII assay are 8%. The blood product of choice is: Cryprecipitated AHF
Which of the following blood components is most appropriate to transfuse an 8-year old male hemophiliac who is about to undergo a minor surgery? heat-treated Factor VIII concentrate
According to AABB standards, platelets prepared from whold blood shall have at least: 5.5X10 to the tenth power, platelets per unit in at least 75% of the units tested
A cause for permanent defferal of blood donation is: a history of jaundince of uncertain cause
Created by: cbuchano