Improving adequacy of dialysis: using in-series dialyzers

Area of Science:

• Nephrology
• Biomedical Engineering

Background:

• Standard hemodialysis may not achieve adequate urea removal in certain patient populations.
• The urea reduction ratio (URR) is a key metric for dialysis efficacy.

Observation:

• A pilot study was conducted on a patient (W.T.) with inadequate dialysis despite standard treatment.
• An in-series dialyzer configuration was implemented to enhance urea removal.

Findings:

• The in-series dialyzer approach improved the URR from 0.52 to 0.64 in the initial month.
• This resulted in a 23% increase in urea reduction, demonstrating enhanced dialysis effectiveness.
• Similar success rates were observed when applied to other patients.

Implications:

• In-series dialyzers offer a cost-effective solution, saving approximately $6 per treatment.
• This method provides adequate dialysis for outlier patients and improves treatment compliance.
• It represents a valuable tool for maintaining patient health in challenging dialysis scenarios.