What is the main purpose of quality control in a laboratory?
Quality control ensures the accuracy and reliability of laboratory test results.
Which sample type is used in internal quality control?
Internal QC uses control samples with known values to validate test accuracy.
What is the difference between quality control and quality assurance?
Quality control focuses on individual test accuracy, while quality assurance covers the overall process and system.
Why is documentation important in quality assurance?
Documented procedures ensure consistency, accountability, and traceability for audits and improvement.
What does a Levy-Jennings chart display?
This chart is used to graph control results over time, identifying shifts or trends.
What is the Westgard Rule used for?
Westgard Rules help determine whether QC results are acceptable or if corrective action is needed.
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Why are proficiency testing programs important?
They assess the performance of laboratories by comparing results with peers under controlled testing.
How often should quality control be performed?
QC should be performed daily or with each test batch depending on the procedure and regulatory guidelines.
What is the role of corrective action in quality assurance?
Corrective actions address identified problems, helping to prevent recurrence and maintain standards.