Microfluidic chip designs and their application for E antigen typing on red blood cells

Area of Science:

• Biotechnology
• Hematology
• Microfluidics

Background:

• The E antigen is a key Rh antigen on red blood cells (RBCs).
• Anti-E antibodies can cause severe hemolytic transfusion reactions and hemolytic disease in newborns.
• Accurate Rh typing is crucial for safe blood transfusions and preventing transfusion complications.

Purpose of the Study:

• To develop and evaluate a microfluidic biochip for Rh E antigen typing.
• To compare different micromixer designs for optimal blood typing reagent and RBC interaction.
• To achieve accurate agglutination for reliable E antigen detection.

Main Methods:

• Development of a microfluidic biochip with integrated micromixers.
• Introduction of blood samples and anti-E reagents via separate syringe pumps.
• Observation and analysis of RBC agglutination within reaction reservoirs.
• Comparison of three micromixer designs through simulation and experimental testing.

Main Results:

• The 8-shape micromixer design demonstrated superior performance for E antigen detection.
• The microfluidic chip successfully differentiated between E-positive and E-negative RBCs.
• Optimal mixing within the 8-shape micromixer led to the most significant agglutination.

Conclusions:

• The developed microfluidic biochip provides an accurate method for Rh E antigen typing.
• The 8-shape micromixer is effective for enhancing agglutination reactions in microfluidic devices.
• This technology holds potential for application in blood bank procedures, including blood typing and compatibility testing.