Westgard Multirule

Question 1

If one control:

Answer 1

¨accept results if control is within ± 2SD

Question 2

If 2 levels of controls

○ ¨apply_____ system

Answer 2

Westgard multirule

Question 3

A “multi-rule” system developed by_________ based on statistical concepts

Answer 3

Dr. James O. Westgard

Question 4

A combination of decision criteria or rules to assess if a system is in-control

Answer 4

WESTGARD MULTIRULE SYSTEM

Question 5

Use when at least 2 levels of control are run with the examination run

Answer 5

WESTGARD MULTIRULE SYSTEM

Question 6

T or F

Cannot use with only one control

Answer 6

TRUE

Question 7

1/ 2s

This is a_____ rule that is violated when a single control observation is outside the ± 2s limits

Answer 7

warning

Question 8

● Violation indicates systematic error

● Two consecutive controls exceed the mean by +/2SD

Answer 8

2/ 2s

Question 9

● This indicates systematic error

● 4 consecutive controls on one side of the mean exceeds +/-1SD

Answer 9

4/ 1s

Question 10

This indicates systematic error

● 10 consecutive controls on one side of the mean

Answer 10

10x

Question 11

● This rule identifies random error

● ž Any QC result outside ± 3s violates this rule

Answer 11

1/ 3s

Question 12

● If there is at least a 4s difference between control values within a single run, the rule is violate for

random error

Answer 12

R/ 4s