Advances in Extracorporeal Liver Support

Area of Science:

• Hepatology
• Biomedical Engineering
• Critical Care Medicine

Background:

• Acute liver failure (ALF) and acute-on-chronic liver failure (ACLF) require liver support for recovery or transplantation.
• Extracorporeal liver support (ECLS) aims to restore hepatic function through detoxification and synthesis.
• Current ECLS systems include artificial (A-ECLS) and bioartificial (B-ECLS) approaches.

Purpose of the Study:

• To review the current state and future directions of ECLS in managing liver failure.
• To evaluate the efficacy of different A-ECLS devices and B-ECLS systems.
• To identify optimal endpoints for future clinical trials.

Main Methods:

• Review of existing literature on A-ECLS and B-ECLS systems.
• Analysis of clinical outcomes, including survival benefits and biochemical parameters.
• Discussion of potential combination strategies and novel study endpoints.

Main Results:

• Artificial ECLS (A-ECLS) devices utilize diffusion, convection, and adsorption to remove toxins and modulate inflammation.
• Plasma exchange is the only A-ECLS modality demonstrating a survival benefit in ALF; other devices need further investigation.
• Bioartificial ECLS (B-ECLS) systems using hepatocytes show potential but lack sufficient evidence for current use.

Conclusions:

• ECLS offers potential therapeutic options for liver failure patients.
• Future research should focus on combination therapies integrating A-ECLS and B-ECLS.
• Efficacy evaluation should incorporate overall survival and transplant-related outcomes beyond transplant-free survival.