What is the purpose of conductivity and pH testing performed with the Phoenix meter during preparation?

• A. To verify dialysate composition and pH
• B. To calibrate the blood pump
• C. To adjust UF goal
• D. To set arterial pressure

Answer: (A)

Verifying dialysate composition and pH before treatment. The Phoenix meter uses conductivity measurements to gauge the overall ionic content of the dialysate (sodium, potassium, calcium, magnesium, bicarbonate, etc.) and checks the pH to ensure the solution is within the correct acidity/alkalinity range. This ensures the dialysate has the proper electrolyte balance and buffering capacity, which is essential for safe and effective dialysis. If either value is off, patients can experience intradialytic hypotension, cramps, or electrolyte and acid–base disturbances. Detecting and correcting these issues during preparation prevents transferring an out-of-spec dialysate to the patient. The other options involve procedures not determined by this meter—calibrating the blood pump, adjusting the ultrafiltration goal, or setting arterial pressure are separate machine functions and not what the Phoenix conductivity and pH checks are for.