Which statement best describes the role of buffering agents in PD dialysate?

Which statement best describes the role of buffering agents in PD dialysate?

• A. They help provide energy for the dialysis process
• B. They help maintain acid-base balance
• C. They increase dialysis efficiency by osmotically drawing water
• D. They are primarily used to color-code dialysate bags

Answer: (B)

Buffering agents in PD dialysate are included to resist changes in pH and support the patient’s acid-base balance. People on dialysis often develop metabolic acidosis, so the dialysate uses buffers like bicarbonate or lactate to provide or generate bicarbonate, helping keep blood pH stable. Bicarbonate in the solution acts directly as a buffer, while lactate is converted to bicarbonate by the liver, contributing to the same goal. This function is separate from energy supply or driving water removal by osmosis, and it isn’t about color-coding bags—their job is to maintain proper acidity and bicarbonate levels in the patient.

Buffering agents in PD dialysate are included to resist changes in pH and support the patient’s acid-base balance. People on dialysis often develop metabolic acidosis, so the dialysate uses buffers like bicarbonate or lactate to provide or generate bicarbonate, helping keep blood pH stable. Bicarbonate in the solution acts directly as a buffer, while lactate is converted to bicarbonate by the liver, contributing to the same goal. This function is separate from energy supply or driving water removal by osmosis, and it isn’t about color-coding bags—their job is to maintain proper acidity and bicarbonate levels in the patient.