Laboratory methods / QC
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Across-runs QC runs _____. Across materials QC runs _____. 1-2s on level 1 and 1-2s on level 2 within the same run becomes _____.
Horizontally Vertically 2-2s (rejection)
Within-run QC compares _____. Within-materials compares _____. Across-materials QC compares _____.
one run to the next results from a single control results from two controls runs/materials
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?
Random errors (involves a single point or a significant change from one point to the next) • 1-3s • R4S System errors (involves more than one point) • 2-2s • 4-1s
An MT should never _____ before attempting to make a change first. Trying _____ should never be done either.
Immediately re-run QC Immediately trying a new control
What might occur with 1-2s as a single rule? What might occur with 1-3s as a single rule?
Increased false rejection Increased false acceptance
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?
50 24 hours max Cupules must always be labeled.