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Revista de la Sociedad Boliviana de Pediatría

versión On-line ISSN 1024-0675


CANO SCH., Francisco et al. Behaviour of dialysis and nutritional parameters in paediatric peritoneal dialysis (PD). Rev. bol. ped. [online]. 2005, vol.44, n.3, pp.202-209. ISSN 1024-0675.

The management of children on PD requires constant monitoring of the dose of dialysis and nutritional support in order to maximise growth and development in the uraemic child. The measurement of a series of dialytic and nutritional variables allow the adjustment of treatment to the childs needs. Objectives: 1) to measure the different variables in child undergoing PD, 2) calculate the dialysis dose (Kt/V), the protein catabolic rate (PCR), the urea equivalent of nitrogen appearence (PNA), the nitrogen balance, the peritoneal equilibrium test (PET) and, 3) to determine the correlation between them. Patients and Methods: A prospective study of 15 children undergoing chronic PD, with 59 serial measurements in a 6 month period. Monthly measurements of weight/height, body surface area, urine volume, dialysis volume in 24 hrs, and the values of creatine, protein, albumin and urea in plasma, urine and dialysate, and in plasma the acid-base and electrolytes. A diet containing proteins according to RDA was given. Kt/V urea peritoneal and residual, PCR, PNA and nitrogen balance were measured monthly, PET every 6 months. Results: The mean Kt/V residual and total was 1.49 ± 1 and 3.41 ± 0.86 respectively. A positive correlation between Kt/v and residual creatine clearence was found (p < 0.05). There were no significant differences between the PET for creatinin (4th hour) or glucose D4/D0 at the beginning and end of the study, 0.78 ± 0.01 and 0.74 ± 0.13 for creatinine and 0.35 ± 0.11 and 0.34 ± 0.08 respectively. Dietary protein intake was 3.32 ± 1.05, protein catabolism 1.32 ± 0.47 gm/kg/day, with a nitrogen balance of 2 gm/kg/day and a PNAn of 0.94 ± 0.33. Total and residual Kt/V was correlated with the PNAn, and a negative correlation between protein intake and plama bicarbonate was found. Conclusions: The variables studied show a positive protein balance and a Kt/V greater than the recommended for adults, suggesting that bigger dialysis doses results in a better nutritional status. The negative correlation between plasma bicarbonate and protein intake suggests a relation between protein intake and acidosis, of which needs to be carefully monitored.

Palabras clave : peritoneal dialysis; Kt/V; PNA; nutrition.

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