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Push/pull hemodiafiltration: technical aspects and clinical effectiveness.

M Miwa1, T Shinzato

  • 1Deaprtment of Internal Medicine, Daiko Medical Center, Nagoya University, Japan.

Artificial Organs
|January 5, 2000
PubMed
Summary
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Pressure-controlled push/pull hemodiafiltration (PC P/P HDF) offers benefits for hemodialysis patients, including symptom relief and improved clinical markers. This method shows enhanced removal of certain toxins compared to conventional hemodialysis.

Area of Science:

  • Nephrology
  • Renal Replacement Therapy
  • Hemodialysis Technology

Background:

  • Push/pull hemodiafiltration (HDF) utilizes high-flux membranes with alternating filtration and backfiltration.
  • The newest iteration, pressure-controlled push/pull (PC P/P) HDF, involves repeated blood dilution and concentration cycles.

Purpose of the Study:

  • To evaluate the clinical effectiveness and characteristics of the pressure-controlled push/pull (PC P/P) hemodiafiltration system.
  • To compare the performance of PC P/P HDF with conventional HDF, particularly regarding solute removal and patient outcomes.

Main Methods:

  • The study describes the PC P/P HDF system, emphasizing the need for hemodiafilters resistant to pressure changes during backfiltration.
  • Suitable hemodiafilters include polyacrylonitrile and polysulfon hollow-fiber types.

Related Experiment Videos

  • Clinical effectiveness was assessed through short-term and midterm outcomes in hemodialysis patients.

    • Main Results:

    • Short-term benefits include relief from joint pain, itchiness, insomnia, irritability, and restless leg syndrome.
    • Midterm improvements involve reduced erythropoietin dosage and enhanced skin pigmentation.
    • PC P/P HDF demonstrated significantly lower albumin loss compared to conventional HDF with protein-permeable membranes.
    • Enhanced removal rates for myoglobin and beta2M were observed with PC P/P HDF.

    Conclusions:

    • PC P/P HDF is a promising hemodialysis technique with significant short- and midterm clinical benefits for patients.
    • The system shows improved efficacy in removing smaller solutes like myoglobin and beta2M compared to conventional HDF.
    • Hemodiafilter material selection is crucial to prevent collapse during the PC P/P HDF process.