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Mid-dilution hemodiafiltration: a comparison with pre- and postdilution modes using the same polyphenylene membrane.

Francisco Maduell1, Marta Arias, Manel Vera

  • 1Department of Nephrology, Hospital Clínic Barcelona, Barcelona, Spain.

Blood Purification
|August 18, 2009
PubMed
Summary

Mid-dilution hemodiafiltration (HDF) with a new polyphenylene membrane offers superior removal of larger molecules compared to pre- and post-dilution methods. This advanced HDF technique presents a promising alternative for enhanced patient treatment.

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Published on: February 23, 2017

Area of Science:

  • Nephrology
  • Biomaterials Science
  • Medical Device Engineering

Background:

  • Recent development of a novel polyphenylene membrane for mid-dilution hemodiafiltration (HDF).
  • Need to evaluate the efficacy of this new dialyzer technology in comparison to established methods.

Purpose of the Study:

  • To compare the performance of mid-dilution HDF using a polyphenylene membrane against pre- and post-dilution HDF.
  • To assess the removal efficiency of various solutes, particularly larger molecules, across different dilution modes.

Main Methods:

  • Prospective study involving 20 patients undergoing 4 HDF sessions.
  • Utilized 1.7 m² polyphenylene dialyzers for predilution and postdilution, and 1.9 m² and 2.2 m² dialyzers for mid-dilution.
  • Infusion flow rates varied: 200 ml/min for predilution and mid-dilution, 100 ml/min for postdilution.

Main Results:

  • Slightly higher urea and creatinine reduction ratios observed with postdilution.
  • Significantly greater reduction ratios for beta(2)-microglobulin, myoglobin, prolactin, and retinol-binding protein with mid-dilution (1.9 m² and 2.2 m²) compared to post- and predilution.
  • Similar solute removal was noted between 1.9 m² and 2.2 m² mid-dilution dialyzers at equivalent convective volumes.

Conclusions:

  • Mid-dilution HDF with the polyphenylene membrane is an effective alternative to traditional methods.
  • This approach demonstrates superior clearance of larger molecular weight solutes.
  • Mid-dilution HDF offers enhanced efficiency, particularly for middle-to-large molecule removal.