Coupled Plasma Filtration Adsorption: A Multipurpose Extracorporeal Detoxification Therapy

Area of Science:

• Nephrology
• Critical Care Medicine
• Toxicology

Background:

• Coupled plasma filtration adsorption (CPFA) is an extracorporeal detoxification system integrating plasma adsorption with continuous renal replacement therapy.
• The CPFA circuit features a plasma filter, an adsorbent cartridge, and a haemofilter, allowing for selective toxin removal.
• It differs from haemoperfusion by processing plasma separately, enabling enhanced toxin-resin contact time and reduced cellular activation.

Purpose of the Study:

• To discuss the fundamental principles of sorbent technology in CPFA.
• To review current clinical experiences and recent human study results of CPFA.
• To explore the expanding applications of CPFA in various critical conditions.

Main Methods:

• CPFA utilizes a closed-loop plasma circuit where plasma flows through a resin cartridge with high affinity for cytokines, mediators, and toxins.
• A subsequent haemofilter manages fluid balance and removes smaller toxins not adsorbed by the resin.
• Plasma separation before resin adsorption optimizes toxin binding by reducing linear velocity and preventing cell-related activation.

Main Results:

• CPFA demonstrates advantages over haemoperfusion due to improved toxin contact time and reduced resin activation.
• The technique effectively removes larger molecular weight toxins while preserving vital substances like albumin.
• Recent human studies show promising implications for CPFA's therapeutic efficacy.

Conclusions:

• CPFA is a versatile detoxification therapy with significant potential in treating conditions beyond sepsis and septic shock.
• Its ability to target a wide range of toxins and preserve essential substances makes it valuable in liver failure, rhabdomyolysis, autoimmune diseases, and poisonings.
• Further research and clinical application of CPFA are warranted to fully elucidate its benefits in patients with and without acute kidney injury.