If a PD patient has high transporter status and inadequate ultrafiltration, which changes would you consider?

• A. Increase dwell time, switch to icodextrin for long dwells, adjust dialysate concentrations, and consider APD if needed.
• B. Decrease dwell time, switch to glucose-based solutions only.
• C. Stop dialysis and start hemodialysis permanently.
• D. Ignore transporter status and maintain current regimen.

Answer: (A)

When a PD patient is a high transporter, solutes move into the blood quickly, which causes the osmotic gradient from the dialysate to dissipate sooner. That makes it hard to maintain enough ultrafiltration with standard dwell times. The best way to address this is to tailor the regimen to sustain the osmotic gradient and maximize water removal.

Increasing the dwell time gives the osmotic gradient more time to pull water into the dialysate before it collapses, improving ultrafiltration in high-transport membranes. Using icodextrin for long dwells provides a different osmotic mechanism that maintains ultrafiltration over extended periods, which is particularly effective for long daytime or nocturnal dwells. Adjusting dialysate concentrations helps fine-tune the osmotic gradient to achieve the right balance between ultrafiltration and solute clearance, without relying solely on glucose. If needed, switching to APD can offer more flexible and precisely timed dwell cycles to optimize ultrafiltration, and it can be combined with icodextrin or tailored solutions when appropriate.

In short, these approaches directly target the challenge of rapid solute transfer by extending or supplementing the osmotic driving force for ultrafiltration, rather than simply maintaining the current regimen.