Development and performance evaluation of a positive reference material for hemolysis testing

Area of Science:

• Biocompatibility Testing
• Materials Science
• Toxicology

Background:

• Hemolysis testing is crucial for evaluating the biological safety of medical devices.
• A standardized positive reference material is needed to validate hemolysis test performance.
• Genapol X-080 was identified as a potent hemolytic agent.

Purpose of the Study:

• To develop and evaluate a positive reference material for hemolysis testing.
• To assess the hemolytic activity of polyvinyl chloride (PVC) sheets containing Genapol X-080.
• To establish a correlation between Genapol X-080 concentration, elution, and hemolytic activity.

Main Methods:

• Survey of 23 chemical compounds to identify hemolytic activity.
• Preparation of PVC sheets spiked with varying concentrations of Genapol X-080 (0.6% and 5.8%).
• Hemolysis testing using direct contact and extract-based assays with rabbit defibrinated blood.
• Quantification of eluted Genapol X-080 using direct contact and extract-based methods.

Main Results:

• Genapol X-080 exhibited significant hemolytic activity at concentrations >20 µg/mL.
• PVC sheets with 0.6% Genapol X-080 showed weak hemolysis, while 5.8% induced complete hemolysis.
• Elution of Genapol X-080 from PVC sheets correlated with incubation time and assay method.
• A clear relationship was observed between the amount of eluted Genapol X-080 and the degree of hemolytic activity.

Conclusions:

• PVC sheets spiked with Genapol X-080 serve as effective positive reference materials for hemolysis testing.
• The developed material allows for validation of hemolysis tests by demonstrating dose-dependent biological responses.
• This approach enhances the reliability of biological safety evaluations for medical devices.