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Acid-base correction and convective dialysis therapies.
1Gambro Research, Lund, Sweden.
Summary
Dialysis patients require bicarbonate buffering to correct acid-base balance. While optimal dialysis can improve buffer uptake, moderate acidosis is common and linked to nutritional status, though the relationship is complex.
Area of Science:
- Nephrology
- Acid-Base Physiology
- Dialysis Therapy
Background:
- Maintaining acid-base balance is crucial for all dialysis therapies.
- Bicarbonate is the preferred buffer in dialysis and substitution solutions.
- Modern dialysis, especially haemodiafiltration, offers efficient buffer delivery.
Purpose of the Study:
- To investigate the acid-base status in patients undergoing contemporary dialysis.
- To explore the relationship between metabolic acidosis and nutritional status in dialysis patients.
Main Methods:
- Analysis of cross-sectional studies on dialysis patients' acid-base status.
- Correlation analysis between plasma bicarbonate levels and nutritional parameters.
Main Results:
- Many dialysis patients exhibit moderate acidosis despite contemporary treatments.
- A negative correlation exists between plasma bicarbonate and nutritional parameters.
- Acidotic patients sometimes show better nutritional status than those with normalized balance.
Conclusions:
- While acidosis can stimulate protein catabolism, its effect on nutrition is complex and may be compensated by adequate nutrition and dialysis.
- Aiming for normalized acid-base balance alongside adequate nutrition and dialysis is desirable for dialysis patients.