Phases of Testing
Oops!
Westgard Rules/Statistics
Westgard Rules/Statistics, too
Miscellaneous
100
Preanalytical, analytical, postanalytical
What are the three phases of testing?
100
Avoidable error due to controllable variables in msmt
What is a systemic error?
100
Formula: square root of the variance
What is SD?
100
"Warning"; accept run
What is the 1 2s rule?
100
Overall mgmt. plan to guarantee the integrity of data; the "system"
What is QA?
200
QC values "out of control"
What is an analytical error?
200
How well a measurement agrees with the accepted "true" value
What is accuracy?
200
Graphical method for displaying QC results and evaluating whether a procedure is in or out of control
What is a L-J chart?
200
If 13S is not violated, check this rule
What is the 2 2s rule?
200
Definition: Refers to all measures included during each assay run to verify that the analyzer is functioning properly
What is QC?
300
Misidentification of patient
What is a preanalytical error?
300
May be caused by variations in incubation temp, changes in lot #s or modifications in test methods
What is systemic error?
300
If either of the 2 control results fall outside of ±3 SD, thi rule has been violated and the run must be rejected
What is the 1 3s rule?
300
Occurs when 10 consecutive values fall on 1 side of the mean
What is the 10 x rule?
300
When a lab changes from one method of analysis to another, this is used to compare the precision of the methods; deally <5%
What is CV?
400
Inaccurate interpretation of laboratory result by the physician
What is a postanalytical error?
400
Reproducibility
What is precision?
400
Statistical system applied when at least 2 levels of controls are used
What are Westgard Rules?
400
Occurs when 1 QC value exceeds the -2 SD and the other exceeds the +2 SD control limit
What is the R 4s rule?
400
These materials substantiate the continued accuracy of the test sys throughout the lab’s reportable range of the test results for the test sys
What are calibrators?
500
Expired reagent
What is an analytical error?
500
Unavoidable errors that are always present in any msmt
What is random error?
500
Occurs when both controls, in the same run, exceeds the ±2 SD control limits; reject run.
What is the 2 2s rule?
500
Occurs when both levels have consecutive results that exceed ±1 SD control limits
What is the 4 1s rule?
500
Series of analytical msmts used to assess the quality of the analytical data; the "tools"
What is QC
M
e
n
u