Biocompatibility in hemodialysis: artificial membrane and human blood interactions
Eduardo Ávila, Rodrígo Sepúlveda, Jaime Retamal, Daniel Hachim
Abstract
Hemodialysis, a cornerstone therapy for chronic kidney disease, represented a crucial advance in the evolution of artificial organs. While its success is largely due to its efficiency in removing uremic toxins, an equally important challenge is to uphold the primum non nocere principle by minimizing the harmful effects of membrane–blood interactions. This review examines the complex mechanisms and key interactions underlying membrane biocompatibility, including complement activation, inflammation, and coagulation disturbances, paving the way for their clinical implications. We also summarize recent innovations in membrane materials and surface engineering aimed at improving hemocompatibility and promoting safer hemodialysis treatments for improved clinical outcomes. Membrane biocompatibility is essential for safe and effective hemodialysis, while bioincompatibility can trigger complement activation, inflammation, and coagulation disorders. Synthetic membranes generally demonstrate superior hemocompatibility compared with cellulose-based membranes. Adverse immune and inflammatory responses to membrane–blood interactions may contribute to oxidative stress, endothelial dysfunction, and immune exhaustion, impacting patient prognosis. Advances in membrane design and surface engineering offer promising strategies to improve safety and clinical outcomes.