Laboratory methods / QC

Question 1

Across-runs QC runs _____.

Across materials QC runs _____.

1-2s on level 1 and 1-2s on level 2 within the same run becomes _____.

Answer 1

Horizontally

Vertically

2-2s (rejection)

Question 2

Within-run QC compares _____.

Within-materials compares _____.

Across-materials QC compares _____.

Answer 2

one run to the next

results from a single control

results from two controls runs/materials

Question 3

What is an example of a random error?

What is an example of a system error?

Are random errors or system errors harder to identify and fix?

Answer 3

Random errors (involves a single point or a significant change from one point to the next)

1. 1-3s
2. R4S

System errors (involves more than one point)

1. 2-2s
2. 4-1s

Question 4

An MT should never _____ before attempting to make a change first. Trying _____ should never be done either.

Answer 4

Immediately re-run QC

Immediately trying a new control

Question 5

What might occur with 1-2s as a single rule?

What might occur with 1-3s as a single rule?

Answer 5

Increased false rejection

Increased false acceptance

Question 6

Cartridges should be changed/added when there are less than _____.

How long must they be out before loading?

What must always be done to cupules?

Answer 6

50

24 hours max

Cupules must always be labeled.