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Related Experiment Videos

Is ionic dialysance a valid parameter for quantification of dialysis efficiency?

L Mercadal1, T Petitclerc, M C Jaudon

  • 1Department of Nephrology, CHU Pitié-Salpétrière, Paris, France.

Artificial Organs
|January 6, 1999
PubMed
Summary
This summary is machine-generated.

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Ionic dialysance (ID) closely estimates urea clearance during hemodialysis, though it

Area of Science:

  • Nephrology
  • Biomedical Engineering
  • Clinical Chemistry

Background:

  • On-line measurement of ionic dialysance (ID) estimates urea clearance (UK) during hemodialysis.
  • Existing correlations are good but discrepancies and the influence of dialyzer membranes remain debated.

Purpose of the Study:

  • To compare ionic dialysance (ID) with urea clearance (UK) using various dialyzer membranes.
  • To investigate the influence of membrane surface charge on the accuracy of ID as a measure of UK.

Main Methods:

  • Eighty-eight ID measurements were performed using a Diascan module.
  • ID was compared to UK measured from blood and dialysate sides.
  • Dialyzers with cellulosic and synthetic membranes, differing in surface charge, were utilized.

Related Experiment Videos

Main Results:

  • ID showed a strong correlation with UK (r=0.91), but was consistently lower by approximately 5%.
  • Semilogarithmic regression improved the correlation (r=0.93).
  • A slight difference was observed based on membrane charge, with ID being closer to UK for charged membranes at lower UK values.

Conclusions:

  • Ionic dialysance (ID) is a reliable parameter for monitoring hemodialysis dose.
  • The observed discrepancy between ID and UK may relate to differences in urea and electrolyte distribution volumes.
  • ID can guide dialysis prescription for achieving adequate normalized dialysis dose (Kt/V).