Achieving euvolemia in peritoneal dialysis patients: a surprisingly difficult proposition

Area of Science:

• Nephrology
• Renal Medicine
• Dialysis Therapy

Background:

• Peritoneal dialysis (PD) is associated with preserved renal function and lower early mortality, partly due to easier euvolemia achievement.
• Concerns exist regarding fluid overload in PD patients, linked to ultrafiltration failure and poorer outcomes in anuric patients with limited fluid removal.
• The prevalence of overhydration in PD is comparable to hemodialysis, though achieving euvolemia presents distinct challenges.

Discussion:

• Challenges in PD fluid management include avoiding excessive glucose exposure and preserving residual renal function when adjusting dry weight.
• Current clinical practice faces limitations in accurately measuring and applying fluid status assessments for PD patients.
• Therapeutic constraints like membrane function, sodium sieving, and the impact of hypoalbuminemia complicate fluid balance in PD.

Key Insights:

• Despite challenges, effective fluid management is crucial for optimizing PD patient care.
• Overhydration in PD patients is a significant concern, mirroring rates seen in hemodialysis.
• Tailored strategies are essential to address the specific fluid management difficulties encountered in PD therapy.

Outlook:

• Available treatments like automated PD, icodextrin, and dietary salt restriction can improve fluid management.
• Emerging therapies, such as low sodium dialysates, offer future potential for enhanced fluid control.
• Further research is needed to guide clinical decision-making for optimal fluid management in PD patients.