Effect of β-cyclodextrin on the hemocompatibility of heparin-modified PMP hollow fibrous membrane for Extracorporeal Membrane Oxygenation (ECMO)

In this paper, modified membranes containing β-cyclodextrin (β-CD) and heparin coatings were prepared on the surface of poly-4-methyl-1-pentene (PMP) hollow fibrous membrane using the high strength adhesion of polydopamine (PDA). In this paper, β-CD was added to increase the hemocompatibility of the PMP hollow fibrous membranes and the stability of the heparin coating. The uniformity of the heparin coating with β-CD addition was better than that of the groups without β-CD. After seven days of saline rinsing, the surface of the modified membranes with β-CD addition still had a large amount of heparin present, which was more stable compared to the control group. After surface modification, the modified membrane changed from hydrophobic to hydrophilic. Importantly, the protein adsorption, platelet adhesion, and hemolysis rates of the modified membranes were significantly reduced compared with the pristine membranes. The APTT values were also significantly increased. The results showed that the modified membranes with the addition of β-CD had better hydrophilicity, can maintain the stability of heparin coating for a long time, and finally showed good hemocompatibility.