Red cell antibody screening and identification: a comparison of two column technology methods

Area of Science:

• Transfusion Medicine
• Serology
• Immunology

Background:

• Antibody screening and identification are crucial in antenatal serology to prevent hemolytic disease of the fetus and newborn.
• Conventional spin-tube techniques for antibody testing can be labor-intensive and prone to errors.
• Column agglutination technologies offer a 'no-wash' indirect antiglobulin testing (IAT) alternative, potentially improving efficiency and reducing errors.

Purpose of the Study:

• To compare the performance of two commercial column agglutination techniques for antibody screening and identification.
• To evaluate the sensitivity and reliability of the DiaMed ID microtyping system and the Ortho Biovue system in antenatal serological investigations.

Main Methods:

• A parallel comparative study was conducted using 1000 random antenatal samples.
• The DiaMed ID system utilizes sephadex gel microtubes (neutral or anti-human globulin [AHG]-impregnated).
• The Ortho Biovue system employs micro glass spheres as a filter matrix with a macromolecular density barrier for AHG columns.

Main Results:

• Both column techniques demonstrated comparable antibody detection rates and sensitivity.
• The DiaMed ID and Ortho Biovue systems both offer 'no-wash' IAT, reducing potential errors.
• The Ortho Biovue technique was observed to produce a higher incidence of equivocal results, particularly in IAT.

Conclusions:

• Both DiaMed ID and Ortho Biovue column techniques are effective for antibody screening in antenatal samples.
• While sensitivity is comparable, the increased rate of equivocal results with the Biovue system warrants consideration.
• Column agglutination methods offer advantages over traditional spin-tube techniques for routine serological testing.