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Dialysis dose and frequency.

Francesco Locatelli1, Umberto Buoncristiani, Bernard Canaud

  • 1Department of Nephrology and Dialysis, Ospedale A. Manzoni, Via Dell'Eremo 11, 23900 Lecco, Italy. nefrologia@ospedale.lecco.it

Nephrology, Dialysis, Transplantation : Official Publication of the European Dialysis and Transplant Association - European Renal Association
|December 16, 2004
PubMed
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Increasing dialysis dose beyond current guidelines may not improve outcomes for thrice-weekly hemodialysis (HD) and peritoneal dialysis (PD) patients. Daily HD shows promise for improving quality of life and various health markers, though survival benefits require further study.

Area of Science:

  • Nephrology
  • Renal Medicine
  • Dialysis Therapy

Background:

  • Optimal dialysis dose and frequency remain central to dialysis treatment delivery.
  • Dialysis adequacy is traditionally assessed using urea kinetics (Kt/V) and creatinine clearance.

Purpose of the Study:

  • To achieve consensus on key aspects of dialysis dose and frequency.
  • To explore the relationship between dialysis parameters and clinical/patient outcomes.

Main Methods:

  • Consensus discussion focusing on dialysis dose and frequency.
  • Review of existing literature on urea kinetic modeling and simplified formulas for dialysis dose calculation.
  • Analysis of outcomes from randomized controlled trials and observational studies on thrice-weekly vs. daily hemodialysis (HD) and peritoneal dialysis (PD).

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Main Results:

  • Increasing dialysis dose above minimum targets in thrice-weekly HD and PD did not improve patient outcomes in recent trials.
  • Daily HD (≥6 sessions/week) demonstrated significant benefits in blood pressure control, cardiac function, anemia, mineral metabolism, nutrition, oxidative stress, and quality of life.
  • These benefits are attributed to more physiological solute and water clearance, reducing interdialytic oscillations.

Conclusions:

  • No reason exists to arbitrarily reduce dialysis dose or treatment time for thrice-weekly HD patients.
  • Daily HD is a promising strategy for enhancing patient outcomes and quality of life, pending definitive proof of survival benefits.
  • Further large-scale prospective studies are needed to validate daily HD's efficacy and facilitate broader acceptance.