Dialysate must have a pH close to the patient's normal blood pH so it does not change the blood's pH.

Dialysate must have a pH close to the patient's normal blood pH so it does not change the blood's pH.

• A. Normal pH
• B. Blood temperature
• C. Blood glucose level
• D. Sodium level

Answer: (A)

Maintaining acid-base balance during dialysis is achieved by keeping the dialysate pH close to the patient’s normal blood pH. The dialyzer brings blood and dialysate into contact across a semipermeable membrane, so ions and hydrogen ions diffuse to equalize concentrations. If the dialysate is acidic, hydrogen ions would diffuse into the blood, lowering blood pH; if it’s too alkaline, bicarbonate or hydroxide would diffuse into the blood, raising pH. By using a dialysate with a pH similar to normal blood pH (around 7.35–7.45, typically near 7.4), we minimize these shifts and keep the patient’s blood pH stable while also supporting the bicarbonate-based balance used to correct metabolic acidosis. Other dialysate factors like temperature, glucose, or sodium affect different aspects of treatment and do not address maintaining pH parity with blood.

Maintaining acid-base balance during dialysis is achieved by keeping the dialysate pH close to the patient’s normal blood pH. The dialyzer brings blood and dialysate into contact across a semipermeable membrane, so ions and hydrogen ions diffuse to equalize concentrations. If the dialysate is acidic, hydrogen ions would diffuse into the blood, lowering blood pH; if it’s too alkaline, bicarbonate or hydroxide would diffuse into the blood, raising pH. By using a dialysate with a pH similar to normal blood pH (around 7.35–7.45, typically near 7.4), we minimize these shifts and keep the patient’s blood pH stable while also supporting the bicarbonate-based balance used to correct metabolic acidosis. Other dialysate factors like temperature, glucose, or sodium affect different aspects of treatment and do not address maintaining pH parity with blood.