Impairment of the mental status of patients on regular dialysis treatment.

The purpose of this study was to assess the mental status of 42 patients on regular dialysis treatment (RDT) by using the Wechsler Adult Intelligence Scale (WAIS) and Wechsler Memory Scale (WMS). Findings were correlated with serum aluminium levels, PTH levels, residual renal function (RRF) and duration of RDT. An impairment of neuropsychological performance related to the duration of RDT was found. However, a possible role of PTH and of absence of RRF could not be excluded. These observations suggest that standard haemodialysis strategies are not able to prevent pathological changes in the brain of uraemic patients.