What monitoring change helps prevent hypokalemia in PD patients?

• A. Monitor serum potassium and adjust dialysate potassium concentration.
• B. Ignore potassium and monitor calcium instead.
• C. Increase phosphate binders to raise potassium.
• D. Limit fluid intake only.

Answer: (A)

Managing potassium balance in PD hinges on watching serum potassium and tailoring the dialysate potassium level. Potassium moves between blood and the PD dialysate by diffusion, so the potassium concentration in the dialysate directly influences how much potassium is removed. If serum potassium trends low, increasing the dialysate potassium concentration reduces potassium loss and helps prevent hypokalemia. Conversely, if potassium is high, lowering dialysate potassium can help remove excess potassium. By consistently monitoring serum potassium and adjusting the dialysate potassium accordingly, you maintain safer potassium levels for the patient.

Ignoring potassium misses a key safety signal; focusing on calcium or phosphate binders doesn’t address potassium balance, and limiting fluid intake doesn’t correct potassium management.