A Proposed Peritoneal-Based Wearable Artificial Kidney

Area of Science:

• Biomedical Engineering
• Nephrology
• Medical Devices

Background:

• Current dialysis methods like continuous ambulatory peritoneal dialysis (CAPD) offer patient freedom but provide inadequate dialysis and fail to remove protein-bound toxins.
• An ideal artificial kidney should mimic natural kidney functions: continuous metabolic control, efficient toxin removal, and patient mobility.

Purpose of the Study:

• To propose a continuous, wearable, peritoneal-based artificial kidney system.
• To enhance dialysis efficiency and toxin clearance while minimizing protein loss.

Main Methods:

• Regeneration of spent peritoneal dialysate using a miniaturized REDY sorbent cartridge.
• Chemically binding urease to an inert support to prevent displacement by protein.
• Utilizing a dual lumen catheter for continuous dialysate flow through the peritoneal cavity.
• Implementing a dialysate flow rate of 4 L/hour through the peritoneal cavity, with 2 L/hour passing through the sorbent cartridge.

Main Results:

• Estimated weekly Kt/V of 6.5 and creatinine clearance of 250 L.
• Effective stripping of toxins from protein in spent dialysate, minimizing protein loss.
• Reduced disposable components, with only the sorbent cartridge and infusate requiring changes every 8 hours.

Conclusions:

• The proposed wearable artificial kidney offers a significant advancement over existing CAPD systems.
• This innovative design promises improved metabolic control, enhanced toxin removal, and greater patient freedom.
• Further development could lead to a more effective and convenient artificial kidney solution.