Sorbent augmented hemodialysis systems: are we there yet?

Area of Science:

• Nephrology
• Biomaterials Science
• Chemical Engineering

Background:

• Sorbent systems are being re-evaluated to enhance dialysis efficiency, addressing limitations of current technology.
• Advances in sorbent design have improved biocompatibility and expanded the range of molecules removable beyond conventional dialysis membranes.
• While one sorbent system is FDA-approved for acute renal failure, others are still under investigation.

Purpose of the Study:

• To review recent advancements in sorbent systems for augmenting dialysis.
• To assess the potential and current limitations of sorbent technology in kidney replacement therapy.
• To highlight the renewed interest in sorbents due to dissatisfaction with existing dialysis methods.

Main Methods:

• Review of recent publications on sorbent systems for dialysis augmentation.
• Analysis of sorbent properties including biocompatibility and molecular removal capabilities.
• Evaluation of the clinical and preclinical status of various sorbent devices.

Main Results:

• New sorbent systems offer improved biocompatibility and can remove molecules beyond conventional dialysis limits.
• Wearable sorbent devices are under investigation but face challenges in achieving adequate small molecule removal.
• Sorbent devices capable of removing unconventional uremic toxins require further study in dialysis patients.

Conclusions:

• There is a resurgence of interest in sorbent technology for dialysis augmentation, driven by the need for improved therapies.
• Further research and clinical validation are necessary to define the role of advanced sorbent systems in dialysis.
• Current limitations in wearable and specialized sorbent devices highlight ongoing challenges in optimizing dialysis treatment.