Compatibility Testing

Question 1

Compatibility testing is also known as ______.

Answer 1

Pretransfusion testing

Question 2

What are the procedures in blood banking?

Answer 2

Proper specimen collection
Reviewing patient transfusion history
ABO, Rh, and antibody testing
Crossmatching
Actual transfusion

Question 3

Blood type that is considered the safest to transfuse during emergency situations

Answer 3

O-negative

Question 4

What is the most common error in compatibility testing?

Answer 4

Clerical error

Question 5

What are the 3 categories of compatibility testing?

Answer 5

Pre-analytical procedures
Serological phase
Post-analytical procedures

Question 6

What are the 4 ways of identifying patients?

Answer 6

Verbalization of name from the px themselves
Patient’s bracelet ID/tag
Asking the watcher
Asking the nurse

Question 7

A patient’s bracelet ID should contain:

Answer 7

Patient’s full name
Hospital number
Name of physician (optional)
Age
Sex

Question 8

Pre-transfusion testing must be done within _____ hours according to Harmening.

Answer 8

72

Question 9

In the Philippines, pre-transfusion testing is done within _____ hours.

Answer 9

12

Question 10

The usual additive used in blood banking

Answer 10

Ethylenediamine Tetraacetic Acid (EDTA)

Question 11

Why is serum much preferred than plasma?

Answer 11

Serum has higher yield of antibodies and has no additives

Question 12

Ideal tube used in blood banking samples

Answer 12

Pink top

Question 13

Tube used in blood banking due to its practicality

Answer 13

Lavender top

Question 14

What is ideally preferred? Serum or plasma?

Answer 14

Serum

Question 15

When hemolysis is observed in the sample, should you reject or accept? Why or why not?

Answer 15

Reject sample. True hemolysis is a sign of positive reaction (complement activation)

Question 16

The MTOD had a difficulty extracting blood from a 4 year old patient. The blood collected was meant for compatibility testing, and she explained that there was difficulty in extracting the blood since she kept resisting. She pre-labeled the tube to save time, which could be lost from the difficult extraction, and submitted the sample in the laboratory.

What was her mistake in this situation?

Answer 16

The MTOD pre-labeled the sample container

Question 17

The MTOD had a difficulty extracting blood from a 4 year old patient. The blood collected was meant for compatibility testing, and she explained that there was difficulty in extracting the blood since she kept resisting. She pre-labeled the tube to save time, which could be lost from the difficult extraction, and submitted the sample in the laboratory.

What should you do as the medtech tasked in processing the sample?

Answer 17

Suspect hemolysis
Reject sample

Question 18

In blood donation, what is the first thing that fis performed?

Answer 18

ABO / Rh typing

Question 19

During antibody testing, you detected alloantibodies in the patient. What should be your next action?

Answer 19

Identify the antibody by performing a complete crossmatch

Give antigen-negative units for the antibody