Blood Bank LabCe Study

% of glycerol used when freezing RBCs?

40%

Common antibody group in delayed hemolytic transfusion reaction?

Kidd

Cause of urticarial transfusion?

certain food allergens or drugs in plasma prodcuts

sugar configuration necessary as base for attachment of other sugars to produce ABO antigens?

Galactose plus fructose

Storage lesions results in?

Decreased plasma pH

storage requirements for granulocyte concentrates?

20-24 C, 24 hours

recognition unit" of classical complement pathway?

C1q

antibodies known to cause TRALI reactions?

HLA antibodies

Method that measures fetal Hgb and/or D positive RBCs to evaluate FMH?

Flow cytometry

Washed red cells benefit which condition best?

IgA deficiency with anti-IgA

Maximum interval during which a recipient sample may be used for compatibility testing?

3 days

Purpose of citrate in RBC product?

Prevents coagulation

over-centrifugation; false positive or negative?

false positive

Group B antigens generally associated with mixed field reaction?

B3

Patients who received dura mater transplant due to increased risk of what?

CJD or vCJD

Genotype (Le) (Se) =

Le(a- b+)

Rouleaux, centrifuging too long, and cold agglutinins lead to false _____ reactions

positives

Lewis antibodies: IgM or IgG?

IgM

significant change in titer when monitoring maternal antibodies using a double dilution?

8 to 32

Rh: enhanced, destroyed, or not affected by enzymes?

enhanced

common cause of febrile non-hemolytic transfusion reactions?

immune response to leukocytes

antibody blood group causes mixed field agglutination pattern?

Lutheran

subset of effector lymphocyte responsible for regulation of antibody production?

TH2

min. HCT for female to donate autologous?

33%

defer for malaria?

3 years

type of antibody causes paroxysmal cold hemoglobinuria (PCH)?

IgG

type of antibody causes cold hemagglutinin disease (CHD)?

IgM

FFP thawed at 30-37C and maintained at 1-6C must be transfused within

24 hours

expiration and storage temp of rejuvenated (non-frozen) RBCs?

24 hours; 1C to 6C