The peritoneal equilibration test in children

Area of Science:

• Nephrology
• Pediatric Nephrology
• Peritoneal Dialysis

Background:

• The Peritoneal Equilibration Test (PET) is a standard method for assessing solute transport in adults.
• Adult peritoneal permeability is categorized into four classes: high, high average, low average, and low.
• Pediatric data on peritoneal transport using PET is limited.

Purpose of the Study:

• To evaluate the feasibility and findings of the Peritoneal Equilibration Test (PET) in a pediatric population.
• To assess peritoneal solute transport and classify permeability in children using adult PET criteria.
• To identify predictors of ultrafiltration in children undergoing peritoneal dialysis.

Main Methods:

• A Peritoneal Equilibration Test (PET) was conducted on 32 children (aged 0.8-17.8 years).
• Standard PET protocol with a dwell volume of 32 +/- 5 ml/kg using 2.5% dialysate was employed.
• Dialysate-to-plasma (D/P) ratios for creatinine and urea, and dialysate glucose to initial dialysate glucose ratios (D/Do) were measured at 2 and 4 hours.

Main Results:

• Age and 2-hour D/Do glucose values were significant predictors of ultrafiltration in children.
• Net ultrafiltration after 4 hours could be predicted in 75% of children older than 9.3 years or with a 2-hour D/Do glucose > 0.45.
• Mean 4-hour D/Do glucose was 0.31 +/- 0.17 and mean 4-hour D/P creatinine was 0.71 +/- 0.12.
• At least 70% of children were classified as having high or high-average peritoneal permeability based on adult standards.

Conclusions:

• The PET is applicable to children, providing valuable insights into peritoneal transport.
• Pediatric patients often demonstrate higher peritoneal permeability compared to adult classifications.
• Age and glucose absorption are key factors influencing ultrafiltration in pediatric peritoneal dialysis.