Related Experiment Videos
Peritoneal functional changes induced by dialysate containing bicarbonate instead of lactate
R Selgas1, M A Bajo, M J Fernandez-Reyes
1Hospital Universitario La Paz, Madrid, Spain.
Summary
Bicarbonate dialysate, with a physiological pH, demonstrated improved peritoneal diffusion compared to low-pH lactate dialysate. This suggests bicarbonate solutions enhance peritoneal dialysis efficiency for certain solutes.
Area of Science:
- Nephrology
- Biomedical Engineering
- Physiology
Background:
- Lactate-containing dialysate has a low pH, leading to poor biocompatibility.
- Bicarbonate-containing dialysate offers a physiological pH and improved biocompatibility.
Purpose of the Study:
- To compare the peritoneal functional effects of bicarbonate (B) and lactate (L) dialysate solutions.
- To evaluate convective and diffusive mass transfer coefficient (MTC) capacities for various solutes during peritoneal dialysis.
Main Methods:
- Eight patients underwent two consecutive peritoneal kinetic tests using both L and B solutions.
- Mass transfer coefficients (MTC) for urea, creatinine, phosphate, potassium, and glucose were determined.
- Ultrafiltration (UF) volumes and transperitoneal solute removal were measured.
Main Results:
- Peritoneal equilibration for urea was significantly higher with B (0.91) vs L (0.87).
- MTC values for urea, creatinine, phosphate, and potassium were slightly higher with B, though not statistically significant (NS).
- Ultrafiltration volume was significantly lower with B (2120 mL) vs L (2443 mL).
- Higher transperitoneal calcium and sodium removal occurred with B dialysate.
- Bicarbonate loss was observed with L dialysate.
Conclusions:
- Bicarbonate dialysate appears to improve the diffusion capacity of the peritoneum.
- Bicarbonate solutions may offer enhanced peritoneal dialysis efficiency compared to lactate solutions.
- Further research is warranted to optimize dialysate composition for improved patient outcomes.