1/26/2022 - Reagents and QC

Question 1

Hemolysis should be recognized as a _________ reaction of an antigen-antibody complex.

Answer 1

positive

Question 2

How would you grade one solid agglutinate?

Answer 2

4+

Question 3

How should you grade several large agglutinates?

Answer 3

3+

Question 4

How should you grade medium-size agglutinates, with clear background?

Answer 4

2+

Question 5

How should you grade small agglutinates, with a turbid background?

Answer 5

1+

Question 6

How should you grade very small agglutinates, turbid background?

Answer 6

1+w

Question 7

how should you grade Barely visible agglutination, turbid background?

Answer 7

w+ or +/−

Question 8

How is no agglutination graded?

Answer 8

0

Question 9

How is a Mixtures of agglutinated and unagglutinated red cells graded?

Answer 9

mf (mixed field)

Question 10

How should complete hemolysis be graded?

Answer 10

H

Question 11

How should Partial hemolysis, some red cells remain be graded?

Answer 11

PH

Question 12

what red cell suspension percentage achieves the appropriate serum-to-cell ratio for most test procedures and for an adequate number of red cells so one can read and grade the reactions?

Answer 12

3%

or 3-5%

Question 13

Postzone is an excess of antigen or antibody?

Answer 13

antigen

Question 14

prozone is an excess of antigen or antibody?

Answer 14

antibody

Question 15

an excess of either antigen or antibody can cause…

Answer 15

false positive or false negative results