Peritoneal membrane transport function in children receiving long-term dialysis.

Journal of the American Society of Nephrology : JASN
B A WaradyE C Kohaut

Abstract

Accurate characterization of peritoneal solute transport capacity in children has been hampered by a lack of standardized test mechanics and small patient numbers. A standardized peritoneal equilibration test was used to study 95 pediatric patients (mean age, 9.9 +/- 5.6 yr) receiving chronic peritoneal dialysis at 14 centers. Patients were divided into four age groups (< 1, 1 to 3, 4 to 11, 12 to 19 yr) for analysis. Each patient received a 4-h peritoneal equilibration test with an exchange volume of 1100 mL/m2 per body surface area. Dialysate to plasma (D/P) ratios for creatinine (C) and urea (U) and the ratio of dialysate glucose (G) to initial dialysate glucose concentration (D/D0) were determined. Mass transfer area coefficients (MTAC) were calculated for the three solutes and potassium (P). The mean (+/- SD) 4-h D/P ratios for C and U were 0.64 +/- 0.13 and 0.82 +/- 0.09, respectively. The mean 4-h D/D0 for G was 0.33 +/- 0.10. D/P and D/D0 ratio results were similar across age groups. Normalized (for body surface area) mean MTAC (+/- SD) values were as follows: C, 10.66 +/- 3.74; G, 12.93 +/- 5.02; U, 18.43 +/- 4.02; and P, 14.02 +/- 3.94. Whereas a comparison of the normalized MTAC values across age groups with an analy...Continue Reading

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