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Solute equilibration curves, crossing time for urea and glucose during peritoneal dialysis: a function of age in
M Fischbach1, L Mengus, B Birmele
1Nephrology-Dialysis-Transplantation-Children Unit, Hôpital Hautepierre, Strasbourg, France.
Insights
Younger children absorb glucose faster during peritoneal dialysis, causing quicker ultrafiltration loss. The study found this glucose absorption rate and its impact on peritoneal equilibration curves remain stable over time in children undergoing continuous ambulatory peritoneal dialysis (CAPD).
Area of Science:
- Pediatric Nephrology
- Renal Physiology
- Dialysis Therapy
Background:
- Glucose absorption from dialysate is faster in younger children on CAPD, leading to early ultrafiltration loss.
- Understanding peritoneal permeability is crucial for optimizing CAPD management in pediatric patients.
Purpose of the Study:
- To assess peritoneal permeability by analyzing urea and glucose equilibration curves (EC).
- To determine the significance of the ECs crossing time point in pediatric CAPD patients.
- To evaluate the stability of the ECs crossing time point over time.
Main Methods:
- Tested peritoneal equilibration curves (EC) for urea and glucose in 8 pediatric patients.
- Patients were divided into two age groups: Group I (mean age 1.5 years) and Group II (mean age 12.5 years).
- Measured the crossing time point of urea and glucose ECs at baseline and during follow-up (mean 20-23 months).
Main Results:
- The crossing time point of urea and glucose ECs was significantly earlier in younger children (Group I: 49 min) compared to older children (Group II: 101 min) (p < 0.001).
- The crossing time point for each patient remained stable throughout the follow-up period.
Conclusions:
- Age significantly influences peritoneal permeability, with younger children exhibiting faster glucose absorption.
- The ECs crossing time point is a stable indicator of peritoneal permeability in pediatric CAPD patients.
- Findings aid in tailoring CAPD management strategies based on age-related peritoneal transport characteristics.
Abstract:
Glucose is absorbed from the dialysate more rapidly in younger than in older children on CAPD leading to a relatively early loss of ultrafiltration during dwell time. In order to assess peritoneal permeability and in term to prescribe optimal management of CAPD, we tested peritoneal equilibration curves (EC) for urea and glucose, especially the crossing time point of these two ECs. Baseline values were obtained from 8 patients divided in two groups by age at start of CAPD: group I (N = 4) mean age 1 year 6 months, mean body weight 8.25 +/- 3.17 kg, group II (N = 4) mean age 12 years 6 months, mean body weight 33.5 +/- 1.5 kg. The crossing time point is earlier in group I (49 +/- 14 min) than in group II (101 +/- 20 min) (p less than 0.001). Followup of each patient, during a mean time of 20 months in group I and 23 months in group II, establishes that the curves crossing time point for each patient remains stable.