Antibody Identification Using Both Automated Solid-phase Red Cell Adherence Assay and Tube Polyethylene Glycol...

Area of Science:

• Transfusion Medicine
• Immunology
• Clinical Laboratory Science

Background:

• Accurate antibody identification is critical for safe blood transfusions.
• Conventional tube antiglobulin methods (PEG-AHG) are the gold standard but can be subjective.
• Automated solid-phase red cell adherence (SPRCA) assays offer improved standardization.

Purpose of the Study:

• To compare the performance, efficiency, and concordance of automated SPRCA (Immucor NEO) with conventional tube PEG-AHG for antibody identification.
• Evaluate detection rates, sensitivity, specificity, and turnaround time (TAT).
• Assess concordance with clinical history in a tertiary care setting.

Main Methods:

• Prospective, observational study of 1000 patient samples over 12 months.
• Simultaneous testing using Immucor NEO SPRCA and conventional tube PEG-AHG methods.
• Comparison of antibody detection rates, TAT, sensitivity, specificity, and concordance.

Main Results:

• Antibodies detected in 10.8% of samples; SPRCA identified 10.6%, PEG-AHG identified 9.8%.
• Complete concordance in 94% of samples; 6% showed discordant results.
• SPRCA demonstrated higher sensitivity (98.1%) and reduced TAT (18 min/batch vs. 35 min/batch).

Conclusions:

• Automated SPRCA (Immucor NEO) offers superior sensitivity, reproducibility, and efficiency for antibody identification.
• Automation in transfusion labs minimizes subjectivity and variability, enhancing workflow and patient safety.
• SPRCA is a valuable advancement over conventional PEG-AHG methods.