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Related Experiment Videos

[Evaluation of the Cell-DYN 35))]

M J Costa1, A B Reis, C Silva

  • 1Laboratório de Hematologia, Hospital Santa Cruz, Carnaxide.

Acta Medica Portuguesa
|October 1, 1996
PubMed
Summary

The Cell-Dyn 3500 hematology analyzer demonstrates good performance, showing strong correlation and accuracy for key blood cell parameters. This automated system effectively reduces the need for manual smear examination in clinical labs.

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Area of Science:

  • Clinical Hematology
  • Laboratory Automation
  • Diagnostic Technology

Background:

  • Automated hematology analyzers are crucial for efficient and accurate blood cell counting.
  • The Cell-Dyn 3500 offers a "five-part" white cell differential and measures 22 parameters.
  • Standardized evaluation is essential to validate new diagnostic instruments.

Purpose of the Study:

  • To evaluate the performance of the Cell-Dyn 3500 automated hematology analyzer.
  • To assess its accuracy, precision, linearity, and carry-over.
  • To compare its five-part white cell differential and flagging system with manual methods.

Main Methods:

  • Evaluation followed International Committee for Standardization in Hematology (ICSH) norms over 5 weeks.
  • 1,235 samples were analyzed and compared against the Coulter MaxM analyzer.

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  • 506 samples underwent manual smear examination for differential white cell count validation.

    • Main Results:

    • Good correlation and day-to-day precision were observed for red blood cells (RBC), hemoglobin (HGB), mean cell volume (MCV), white blood cells (WBC), and platelets (PLT).
    • Excellent agreement was found between the Cell-Dyn 3500 and Coulter MaxM for automated hemocytometric values.
    • High accuracy was achieved for automated differentials, particularly for neutrophils and lymphocytes, with good results for monocytes and eosinophils.

    Conclusions:

    • The Cell-Dyn 3500 is a reliable hematology analyzer with good performance characteristics.
    • It demonstrates strong agreement with established methods and reduces the need for manual morphological examination.
    • The analyzer's flagging system shows good specificity, with better sensitivity using the manual's alarm detection criteria.