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[Hemodiafiltration with high-level ultrafiltration versus hemodialysis. Longitudinal study]
M Gonella1, G Calabrese, A Mazzotta
1Ente Ospedaliero, Casale Monferrato, Servizio di Nefrologia e Dialisi.
Summary
High-efficiency hemodiafiltration significantly reduces dialysis time and improves hemoglobin levels compared to standard hemodialysis. This advanced dialysis method may offer better biocompatibility and efficiency for chronic kidney disease patients.
Area of Science:
- Nephrology
- Biomedical Engineering
Background:
- Chronic kidney disease patients require renal replacement therapy.
- Dialysis techniques aim to improve patient outcomes and quality of life.
Purpose of the Study:
- To compare clinical and biochemical differences between high-efficiency hemodialysis and hemodiafiltration.
- To evaluate the impact of different dialysis membranes and ultrafiltration rates on patient parameters.
Main Methods:
- Prospective study of well-nourished young patients undergoing two consecutive long-term dialysis schedules.
- Hemodialysis using a 1.2 m2 cuprophan membrane at 400 ml/min blood flow.
- Hemodiafiltration using high-permeability membranes (≥1.4 m2) with ultrafiltration rate >100 ml/min.
Main Results:
- Hemodiafiltration showed higher clearances, significantly reducing dialysis time, Blood Urea Nitrogen (BUN), and serum creatinine.
- Hemodiafiltration led to a significant increase in hemoglobin, potentially due to improved detoxification.
- Dry body weight decreased with hemodialysis but increased with hemodiafiltration, suggesting altered nutrient utilization.
Conclusions:
- Highly permeable synthetic membranes are preferable to cuprophan membranes in chronic dialysis due to better biocompatibility.
- Utilizing the highest ultrafiltration rate during hemodiafiltration enhances dialytic efficiency and mitigates backfiltration risks.