Validation rules for blood smear revision after automated hematological testing using Mindray CAL-8000

Area of Science:

• Hematology
• Clinical Pathology
• Laboratory Automation

Background:

• Automated hematological testing requires robust validation rules for accurate blood smear review.
• The Mindray CAL-8000 system was evaluated for its performance in routine hematological testing.

Purpose of the Study:

• To assess the efficacy of custom-defined and International Consensus Group for Hematology (ICGH) validation rules for blood smear review.
• To analyze the workflow and performance of the Mindray CAL-8000 automated hematology system.

Main Methods:

• Analysis of 1013 peripheral blood samples using the Mindray CAL-8000 system.
• Comparison of automated results with optical microscopy (OM) findings.
• Evaluation of locally derived and ICGH validation rules.

Main Results:

• Overall agreement with locally derived rules was 91% and with ICGH rules was 85%.
• Locally derived rules showed higher sensitivity (0.97) and lower false negative rates (1.4%).
• The CAL-8000 system achieved a throughput of 208 samples/h with 14-17% requiring OM analysis.

Conclusions:

• Customization of validation rules is crucial for improving the quality of hematological testing.
• Optimizing validation rules enhances laboratory workflow efficiency and accuracy.
• The study highlights the need for tailored validation strategies in automated hematology.