Determination of optimal method for antibody identification in a reference laboratory

Area of Science:

• Immunohematology
• Transfusion Medicine
• Clinical Laboratory Science

Background:

• Antibody identification is crucial for safe blood transfusions.
• Common methods include tube, gel, and solid-phase testing.
• Optimizing detection of clinically significant antibodies is essential.

Purpose of the Study:

• To compare the efficacy of three antibody identification methods: tube, gel, and solid-phase.
• To determine the optimal method for detecting all clinically significant antibodies in an immunohematology reference laboratory.

Main Methods:

• AABB immunohematology reference laboratory (IRL) study.
• Comparison of tube, manual gel, and manual solid-phase methods.
• Analysis of 254 patient specimens tested between August 2008 and September 2009.

Main Results:

• The tube method identified all but six clinically significant antibodies, outperforming gel (missed 59) and solid-phase (missed 56).
• Solid-phase testing failed to detect 12 examples of anti-K.
• Tube testing identified more clinically insignificant antibodies (cold autoantibodies) than gel or solid-phase methods.

Conclusions:

• The hemagglutination tube method was the best choice for the IRL, missing the fewest clinically significant alloantibodies.
• Tube method offers flexibility with potentiating factors, incubation times, and temperatures for enhanced antibody identification.
• Tube method provides critical data for determining antibody clinical significance.