Exam 4_ABID & Compatibility

Question 1

Compatibility Testing

Answer 1

involves all the steps in the identification and testing of a donor unit and a proposed recipients blood

Question 2

Crossmatching

Answer 2

part of compatibility testing
-involves mixing donor RBC and recipient serum or plasma
-no agglutination or hemolysis indicates compatibility
-agglutination or hemolysis indicates incompatibility (positive result)

Question 3

What is the purpose of crossmatching?

Answer 3

-double check of ABO ERRORS
-PROVIDES a second means of detecting Antibodies
according to AABB stds: “shall use methods that demonstrate ABO incompatibility and clinically significant antibodies to red cells antigens and shall include an antiglobulin phase” so type and screen show ABO…
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Question 4

What are the two serologic crossmatching?

Answer 4

-IS cross match
-Extended Crossmatch

Question 5

What is IS Crossmatch?

Answer 5

performed when the recipient has no evidence of an antibody in the current sample or in pt hx
-recipient serum and donor RBC suspension are mixed and immediately centrifuged
-Fullfills AABB stds for detecting ABO incompatability

Question 6

What is an extended crossmatch?

Question 7

What can cause a positive result in the serologic crossmatch

Answer 7

• ## incorrect ABO grouping of the pt or donor-

Question 8

What is alloantibody?

Question 9

What are warm-reactive autoantibody?

Question 10

What are limitations to crossmatching?

Question 11

Pretransfusion will if performed correctly…

Question 12

Transfusion Request Form

Answer 12

-oral, written, electronic,
-two identifiers:
-blood is a drug and requires physician prescription
-special neds: CMV negative…

Question 13

Specimens: general pts

Question 14

Specimens: neonates

Question 15

Specimens: Elective Surgery pts

Question 16

Probability in Blood Banking: for antigen negative units