Iron-deficiency is a common phenomenon in chronic renal diseases and haemodialysis patients, a treatment with iron or transfusions is always provided in an early preventive way; yet, an overload may appear. Serum ferritin, in spite of analytic variability, remains at the present time a good witness to appreciate patients' iron stores. Authors report the results obtained with four commercial reagents in healthy population and in haemodialysed children or adults. The comparison of results for this parameter shows that haemodialysed sera, with or without treatment, have the same behaviour with reagents as those of healthy subjects.
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