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The variability in ultrafiltration achieved with icodextrin, possibly explained.

Daniele Venturoli1, Tarun K Jeloka, Fevzi F Ersoy

  • 1Lund University Hospital, Lund, Sweden. Daniele.Venturoli@med.lu.se

Peritoneal Dialysis International : Journal of the International Society for Peritoneal Dialysis
|July 16, 2009
PubMed
Summary
This summary is machine-generated.

The plasma colloid osmotic pressure gradient significantly impacts ultrafiltration (UF) volume and time with icodextrin. Changes in peritoneal UF coefficient and macromolecular clearance have moderate effects, highlighting osmotic pressure

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Area of Science:

  • Nephrology
  • Peritoneal Dialysis
  • Transport Phenomena

Background:

  • High variability in ultrafiltered volume (UF(max)) and dwell time (t(max)) with 7.5% icodextrin was previously observed.
  • Investigating the sources of this variability is crucial for optimizing peritoneal dialysis treatments.

Purpose of the Study:

  • To simulate icodextrin ultrafiltration (UF) profiles using the three-pore model.
  • To identify key parameters influencing UF variability in peritoneal dialysis.

Main Methods:

  • Characterized individual UF time courses using regression analysis.
  • Adapted UF profiles to the three-pore model by altering parameters: mass transfer area coefficient (PS), peritoneal UF coefficient (LpS), plasma colloid osmotic pressure gradient (DeltaPi), and macromolecular clearance (Cl(LF)).

Main Results:

  • Altering the mass transfer area coefficient (PS) had minimal impact on UF(max) and t(max).
  • Changes in LpS and Cl(LF) produced more significant, yet moderate, variations in UF.
  • The plasma colloid osmotic pressure gradient (DeltaPi) was the most influential parameter; lowering it increased UF, while increasing it flattened UF profiles.

Conclusions:

  • The plasma colloid osmotic pressure gradient is the primary determinant of UF patterns during icodextrin dwells.
  • Moderate influence was observed for LpS and Cl(LF).
  • Further clinical studies are needed to validate these findings regarding icodextrin's osmotic effects.