Automated hematology: where we stand.

Area of Science:

• Hematology
• Clinical Pathology
• Medical Laboratory Science

Background:

• Manual complete blood count (CBC) testing is labor-intensive and lacks reproducibility.
• The demand for cost-effective and efficient laboratory diagnostics is increasing.
• Automated hematology analyzers are crucial for modern clinical laboratories.

Purpose of the Study:

• To evaluate the precision and accuracy of the Coulter S+ automated hematology analyzer.
• To assess the utility of automated CBC parameters and histograms in clinical diagnostics.
• To review the benefits and drawbacks of laboratory automation in hematology.

Main Methods:

• Utilized the Coulter S+ series instrument for automated cell counting.
• Employed the nonoptical electronic impedance method for cell analysis.
• Analyzed data from over 3,500 patient cases.

Main Results:

• The Coulter S+ demonstrated high precision and accuracy in counting red blood cells (RBC), white blood cells (WBC), and platelets.
• Achieved a false-negative rate below 4% and a false-positive rate of 30% for abnormality flagging.
• Identified that all normally screened CBCs were free of significant abnormalities.
• Observed that innovative parameters and histograms aid in differential diagnoses.

Conclusions:

• Automated hematology analyzers like the Coulter S+ significantly enhance laboratory efficiency and diagnostic accuracy.
• The instrument's ability to generate histograms provides valuable data for differential diagnoses.
• Despite automation's advantages, morphologic examination of blood smears is indispensable for definitive hematologic diagnosis.