Blood Banking

Question 1

Blood Group Systems #79

Which of the following phenotypes will react with anti-f?
* rr
* R1R1
* R2R2
* R1R2

Answer 1

rr

*Anti-f will react with all cells that carry c and e on the same Rh polypeptide. No other listed genotype produces an Rh polypeptide that carries both c and e.

Question 2

Blood Group Systems #85

Which of the following is the immunodominant sugar responsible for the A antigen?
* Fucose
* N-acetylgalactosamine
* Galactose
* N-acetylglucosamine

Answer 2

N-acetylgalactosamine

Question 3

Blood Group Systems #88

A patient is typed with the following results:
Patient’s Cells with:
* anti-A – 0
* anti-B – 0
* anti-A,B – 2+

Patient’s Serum with:
* A1 red cells – 2+
* B red cells – 4+
* Ab screen – 0

The most probable reason for these findings is that the patient is:
* O; confusion due to faulty group O antiserum
* O; with an anti-A1
* Ax; with an anti-A1
* A1; with an anti-A

Answer 3

Ax; with an anti-A1

*Ax cells are more strongly reactive with anti-A,B than with anti-A, and the plasma frequently has anti-A1 present

Question 4

Physiology and Pathophysiology #186

A specimen of cord blood is submitted to the transfusion service for routine testing. The results are as shown:
* anti-A – 4+
* anti-B – Negative
* anti-D – 3+
* Rh-control – Negative
* Direct antiglobulin test – 2+

It is known that the father is group B, with the genotype of cde/cde. Of these 4 antibodies, which 1 is the most likely cause of the positive direct antiglobulin test?
* anti-A
* anti-D
* anti-c
* anti-C

Answer 4

anti-c

Question 5

Blood Products #45

According to AABB Standards, Fresh Frozen Plasma must be infused within what period of time following thawing?
* 24 hours
* 36 hours
* 48 hours
* 72 hours

Answer 5

24 hours

*Per AABB Standards, thawed FFP should be stored at 1-6°C for no more than 24 hours

Question 6

Blood Products #38

Upon inspection, a unit of Apheresis Platelets is noted to have visible clots, but otherwise appears normal. The technologist should:
* Issue witout concern
* Filter to remove the clots
* Centrifuge to express off the clots
* Quarantine for Gram stain and culture

Answer 6

Quarantine for Gram stain and culture