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Related Experiment Videos

[Development of a control method for sample distributors]

F Durand1, B Annic, B Genetet

  • 1Centre Régional de Transfusion Sanguine de Rennes.

Transfusion Clinique Et Biologique : Journal De La Societe Francaise De Transfusion Sanguine
|January 1, 1995
PubMed
Summary
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Routine testing of automated blood bank dispensers is crucial. Dilution errors in serum distribution can be minimized by optimizing volumes for accurate quantitative testing.

Area of Science:

  • Clinical Laboratory Science
  • Biomedical Engineering
  • Analytical Chemistry

Context:

  • Automated liquid handling systems are increasingly used in Blood Bank laboratories.
  • Regular verification of equipment performance is essential for reliable results.
  • This study evaluates the accuracy of automated dispensers in various simulated scenarios.

Purpose:

  • To assess the accuracy of automated liquid dispensers (Microlabs and IEMS) in Blood Bank settings.
  • To investigate the impact of dispensing volume and dilution on accuracy.
  • To develop a routine testing program for monitoring dispenser performance.

Summary:

  • The Beer-Lambert law was applied using a colored solution to test dispenser accuracy.
  • Four dispensing programs simulated different serum dilution scenarios.

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  • Accuracy, measured by coefficient of variation (CV), ranged from 0.7% to 9.8%. Large volume dispensing showed CV < 5%, while dilutions introduced errors, particularly with small volumes.
  • Optimizing serum and diluent volumes is necessary to achieve CV < 5% for quantitative tests.

    • Impact:

    • Findings highlight the importance of considering dilution effects on dispenser accuracy in quantitative assays.
    • The proposed testing program can be easily implemented for routine monitoring of automated dispensers.
    • Ensuring dispenser accuracy is critical for reliable diagnostic testing in Blood Banks.