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DialyzersA hemodialysis (HD) dialyzer is a plastic cartridge containing thousands of parallel hollow fibers, which serve as semipermeable membranes. These fibers are typically made from cellulose-based or other synthetic materials. During HD, blood is pumped into the top of the cartridge and distributed among these fibers. Simultaneously, dialysis fluid, known as dialysate, is introduced into the bottom of the cartridge, bathing the outside of the fibers. Across the semipermeable membrane,...
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Incremental vs. standard hemodialysis for preserving residual kidney function: a case-control study.

Bianca Vitória Dos Santos Barbosa1, Vanessa Piacitelli Cassimiro Sobrinho2, Ana Paula Rovani Cardoso2

  • 1Medical School (FMB) of São Paulo, State University (Unesp), Botucatu Campus, Botucatu, São Paulo, Brazil. bianca.vs.barbosa@unesp.br.

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Summary

Incremental hemodialysis (HD) may preserve residual kidney function (RKF) and improve quality of life in chronic kidney disease patients compared to standard HD. This approach shows promise for better patient outcomes without compromising survival.

Keywords:
Chronic kidney diseaseHemodialysisIncremental dialysisResidual kidney function

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Area of Science:

  • Nephrology
  • Renal Replacement Therapy
  • Chronic Kidney Disease Management

Background:

  • Chronic kidney disease (CKD) is a significant global health concern.
  • Hemodialysis (HD) is a primary treatment, but its impact on residual kidney function (RKF) varies.
  • Incremental HD is a proposed alternative with limited evidence regarding its benefits.

Purpose of the Study:

  • To compare the preservation of residual kidney function (RKF) between incremental HD and standard HD.
  • To evaluate the impact of incremental HD on quality of life, hospitalizations, and mortality.
  • To assess the safety and effectiveness of incremental HD in stage 5 CKD patients.

Main Methods:

  • Retrospective, longitudinal, observational case-control study.
  • Included 80 stage 5 CKD patients (January 2021 - January 2023).
  • Compared incremental HD (2x4h/week or 3x<3.5h/week) vs. standard HD (3x≥4h/week), matched for demographics and baseline values.

Main Results:

  • 45% of incremental HD patients retained RKF; none in the standard HD group.
  • Incremental HD group showed fewer infections and longer time free from RKF loss.
  • No significant differences in cardiovascular events, mortality, or transplantation rates between groups.

Conclusions:

  • Incremental HD may better preserve RKF and enhance quality of life without compromising survival.
  • RKF preservation was linked to incremental HD, higher albumin levels, and absence of bloodstream infections.
  • Further clinical trials are recommended to validate incremental HD's safety and effectiveness for patient-centered care.