Intermittent Infusion Hemodiafiltration: A Narrative Review of an Emerging Dialysis Modality

Area of Science:

• Nephrology
• Dialysis Technology
• Renal Replacement Therapy

Background:

• Growing global prevalence of end-stage renal disease (ESRD) increases demand for effective dialysis.
• Conventional hemodialysis faces limitations including intradialytic hypotension and inadequate clearance of medium-sized toxins.
• Need for advanced dialysis modalities to improve patient outcomes and quality of life.

Purpose of the Study:

• To evaluate the efficacy and benefits of intermittent infusion hemodiafiltration (I-HDF) as an alternative dialysis technique.
• To assess I-HDF's impact on intradialytic hypotension, toxin removal, and hemodynamic stability.
• To explore I-HDF's potential role in improving long-term survival in ESRD patients.

Main Methods:

• I-HDF combines standard hemodialysis with cyclic backfiltration of ultrapure dialysate.
• This hybrid approach allows for dynamic blood volume control and membrane backflushing.
• Clinical studies and large-scale cohort data were analyzed to assess outcomes.

Main Results:

• I-HDF demonstrated a reduced incidence of intradialytic hypotension.
• Significant improvement in systemic and microcirculatory perfusion was observed.
• Enhanced clearance of middle molecules (e.g., β2-microglobulin) with minimized albumin loss.
• Potential association with improved long-term survival in dialysis patients.

Conclusions:

• I-HDF offers significant physiological advantages for dialysis patients, including better hemodynamic control and toxin clearance.
• The technique presents a viable and flexible solution, especially in resource-limited settings.
• Further research is needed to optimize I-HDF protocols and confirm its widespread applicability.