Evaluation of the Peritoneal Equilibration Test in Children on Chronic Peritoneal Dialysis

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Abstract
The peritoneal equilibration test (PET) is routinely performed in adults treated with chronic peritoneal dialysis to assess the peritoneal transport rate and to optimize treatment prescription. Only a few and not well-standardized studies on the PET have been reported in children. Twenty-six PETs were performed In 16 children, mean age 10.9±4.9 years, mean body weight (BW) 26.8±11.9 kg, treated with nightly intermittent peritoneal dialysis (NIPD). The PET was performed according to Twardowski. Forty mL/kg BW of 2.27% glucose solution were Infused at a rate of 10 mL/kg BW every 2 minutes. In the simplified test, dialysate samples were taken at dwell times 0, 2 and 4 hours for glucose and creatinine. A blood sample was taken after a 2-hour dwell time for the same parameters. The standard PET (8 patients) consisted of dialysate samples at 0, 15, 30, 60, 120, and 240 minutes and blood samples at 0 and 240 minutes. Mean DIP ratio for corrected creatinine and DIDo ratio for glucose at 2 hours were 51.6±11.6 and 50.4±9, respectively; at 4 hours 69.6± 12 and 34.4±9.8, respectively. There was good correlation between DIP creatinine and DIDo glucose at 4 hours (pDIP creatinine for children were higher and DIDo glucose lower than those of adults as reported by Twardowskl. A consistent percentage of children had, nevertheless, a low-average or low transport rate. Standard PET is required in case of automated peritoneal dialysis prescription.

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