Adequacy of peritoneal dialysis

Area of Science:

• Nephrology
• Renal Medicine
• Dialysis Therapy

Background:

• The National Kidney Foundation-Dialysis Outcomes Quality Initiatives (NKF-DOQI) guidelines aimed to standardize peritoneal dialysis (PD) for end-stage renal disease (ESRD) patients.
• Existing guidelines have generated controversies regarding solute clearance targets, sometimes leading to inappropriate patient transfers to hemodialysis.
• A need exists to re-evaluate guideline rationale and adapt prescriptions based on peritoneal physiology.

Purpose of the Study:

• To review the rationale behind NKF-DOQI guidelines for peritoneal dialysis.
• To discuss modifications and controversies surrounding solute clearance targets.
• To propose a rational approach for PD prescription adjustments considering patient-specific factors and overall adequacy.

Main Methods:

• Review of existing NKF-DOQI guidelines and their modifications.
• Analysis of peritoneal physiology to inform prescription adjustments.
• Comparison of international guidelines for solute clearance targets.
• Discussion of factors beyond solute clearance, such as volume and blood pressure control.

Main Results:

• Newer guidelines propose differentiated creatinine clearance targets based on patient transporter status.
• Kt/V targets remain consistent across different transporter types.
• Rationale for similar targets in continuous ambulatory peritoneal dialysis (CAPD) and cycler peritoneal dialysis (CCPD) with a mid-day exchange is examined.
• Importance of blood pressure and volume control as key components of dialysis adequacy is emphasized.

Conclusions:

• Peritoneal dialysis prescription requires a nuanced approach, considering individual patient needs and transporter characteristics.
• Solute clearance is only one facet of adequate dialysis; hemodynamic stability and euvolemia are equally critical.
• Revising PD prescriptions based on physiological principles can optimize patient outcomes and prevent unnecessary modality changes.