Dialysate Concentrates and Powder Mixing
Key Takeaways
- Dialysate is made by proportioning treated water with acid and bicarbonate concentrates according to the prescription.
- Wrong concentrate, wrong connection, incomplete mixing, or expired concentrate can create unsafe dialysate.
- Conductivity and pH checks with an independent device are key safeguards before treatment.
- Powder mixing requires exact procedure, labeling, lot control, and documentation.
Concentrate handling
Dialysate is usually made from treated water, acid concentrate, and bicarbonate concentrate. The dialysis machine proportions these streams to produce the prescribed bath. Concentrate selection matters because potassium, calcium, sodium, bicarbonate, glucose, and acid components can differ by container.
The technician should verify the prescription, the concentrate labels, the machine settings, and the concentrate connections. Color coding helps, but it does not replace reading the label. A container that looks familiar can still be the wrong bath.
Independent conductivity and pH checks confirm that the final dialysate is within the expected range before patient connection. If conductivity or pH fails, do not start treatment. Recheck using policy, confirm the correct concentrates, and notify the appropriate staff.
When mixing bicarbonate or other concentrate from powder, follow the manufacturer's directions and facility procedure. Use the correct water volume, powder amount, mixer, contact time, container, and label. The label should support traceability, including mix date, expiration or discard time, lot information, and initials as required.
Powder must fully dissolve before use. Do not top off old concentrate, mix lots casually, use an unlabeled jug, or borrow concentrate from another station without verification. Concentrate errors can cause serious patient events.
Exam Tie-In
For CCHT items, concentrate questions often hide a safety check inside routine setup. Do not rely on color, memory, or habit. Verify the prescription, labeling, conductivity, pH, expiration, and facility procedure before treatment begins.
The prescription calls for a 2 potassium bath, but the acid concentrate jug at the station is labeled 3 potassium. What should the technician do?
After concentrate setup, the independent pH check is outside the acceptable range. Which action is best?
Which practice is unsafe when mixing bicarbonate concentrate from powder?