[Bicarbonate dialysis: comparative study of its long-term effects]

Area of Science:

• Nephrology
• Clinical Chemistry

Background:

• Hemodialysis requires careful management of electrolyte balance.
• Acetate-containing dialysate (AC) has been used, but bicarbonate-containing dialysate (BC) is proposed as a superior alternative.

Purpose of the Study:

• To compare the long-term effects of AC versus BC on blood bicarbonate, phosphate, and lipid levels in hemodialysis patients.
• To assess patient tolerance and adverse events associated with each dialysate type.

Main Methods:

• A longitudinal study involving 9 hemodialysis patients over 4 years.
• Patients were dialyzed with AC for 2 years, followed by BC for 2 years.
• Blood samples were analyzed for bicarbonate, phosphate, and lipids; adverse events were recorded.

Main Results:

• Patients on BC achieved higher predialysis blood bicarbonate levels (26.72 +/- 1.26 mmol/L vs 23.11 +/- 1.09 mmol/L).
• Phosphate levels were lower on BC, with reduced need for phosphate binders.
• Significant improvements in patient tolerance were observed on BC, with 50% fewer hypotensive episodes and muscle cramps, and near-complete resolution of headaches, nausea, and vomiting.

Conclusions:

• Bicarbonate-containing dialysate offers superior patient tolerance and improved acid-base balance compared to acetate-containing dialysate.
• The findings strongly support the widespread adoption of bicarbonate-containing dialysate for hemodialysis patients.