Laboratory Quality Control in Hematology | Levey–Jennings, Westgard Rules & QC Errors
Understand *Laboratory Quality Control (QC) in Hematology* with a practical approach to recognizing errors, interpreting Levey–Jennings charts, applying Westgard rules, and troubleshooting out-of-control results.
In this video, we cover:
• Difference between *Quality Assurance (QA) and Quality Control (QC)*
• Internal Quality Control (IQC)
• External Quality Assessment (EQA) / proficiency testing
• Mean, standard deviation and coefficient of variation
• Why approximately *95.4% of results fall within ±2 SD*
• Levey–Jennings charts and their interpretation
• Shift and trend patterns
• *Random error vs systematic error*
• Causes of random analytical errors
• Causes of systematic analytical errors
• Important *Westgard rules* including 1₂s, 1₃s, 2₂s, R₄s, 4₁s and 10x
• Which Westgard rules suggest random or systematic error
• How to troubleshoot failed QC
• Checking controls, reagents, calibration and instrument performance
• When patient results should not be released
• Practical laboratory approach to corrective action
• Importance of documentation and continuous quality improvement
This video is useful for **hematology residents, pathology trainees, laboratory technologists, medical laboratory scientists, postgraduate examinations and routine hematology laboratory practice**.
🔬 *HemeWise by Dr Sahrish*
Learn • Understand • Apply
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