Exercise 4: Quality Control

Westgard rule that is considered as a warning rule

12s

Identify the type of error: Pipetting error

Random error

Identify the type of error: 10x

Systematic error

Identify the error

Random error

Identify the type of error: Dirty optics

Random error

Identify the type of error: Calibration problem

Systematic Error

Number of QC Levels used in the clinical chemistry laboratory:

2

Identify the error

Random Error

Identify the type of error: R4s

Random error

Identify the type of error: 13s

Random error

Type of quality control used to daily monitor the performance of the laboratory equipment:

Intralaboratory Quality Control

Identify the type of error: 22s

Systematic error

It is the most commonly used QC shart

Shewhart - Youden Plot (Levey-Jennings Chart)

This plot will give the earliest indication of systematic errors (trend) and can be used with 13s rule

Cusum Plot

It is used to compare results obtained on a high and low control serum from different laboratories

Youden Plot

Identify the rule violated:

R4s

Identify the rule violated:

22s

Identify the rule violated:

None

Identify the rule violated:

12s

Identify the rule violated:

10x

Identify the rule violated:

Shift

Identify the error:

Systematic Error

Refers to the set of rules used to decide if a control run is acceptable or not

Westgard rule

Identify the error:

Systematic Error

Identify the type of error: Contaminated solutions

Systematic Error