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[Serum ferritin in children with disorders of iron balance]
Insights
This study shows that serum ferritin (SF) assays reliably detect iron deficiency and overload in children. The assay accurately reflects iron status across various conditions, including chronic kidney disease and thalassemia.
Area of Science:
- Pediatric Hematology
- Clinical Chemistry
- Biochemical Assays
Context:
- Iron metabolism is crucial for child development and health.
- Accurate assessment of iron status is vital for diagnosing and managing various pediatric conditions.
- Existing serum ferritin assays may have limitations in sensitivity and specificity.
Purpose:
- To evaluate a heterologous antibody system for serum ferritin (SF) assay in children.
- To determine the reliability of this SF assay in discriminating iron deficiency and overload.
- To correlate SF levels with other hematologic and biochemical markers of iron status.
Summary:
- A heterologous antibody system for serum ferritin (SF) assay was used in 184 children.
- This assay provided higher SF levels than homologous systems, enabling reliable discrimination of iron deficiency and overload.
- SF levels correlated significantly with hemoglobin, MCV, MCH, and transferrin saturation, except in conservatively treated chronic renal failure patients.
Impact:
- This improved SF assay facilitates accurate diagnosis of iron-related disorders in children.
- It aids in monitoring iron status in children with chronic diseases like renal failure and thalassemia.
- Findings support the clinical utility of this assay for pediatric iron status assessment.
Abstract:
Serum ferritin (SF) was determined by an immunoradiometric assay in a heterologous antibody system in 184 children of different ages with and without hematologic or biochemical signs of disturbed iron metabolism. SF levels as determined by this assay were higher than with a homologous antibody system, allowing a reliable discrimination of iron deficiency and overload. In normal children SF increased with age. In latent iron deficiency all SF values were below the normal range, if patients with signs of infections, elevated serum transaminases or parenteral iron therapy were excluded. In anemia of chronic renal failure there was a wider range of values than in controls, especially in children on intermittent hemodialysis. Highest SF values were obtained in polytransfused children with thalassemia. Significant correlations were observed between SF on one hand and Hb, MCV, MCH and serum transferrin saturation on the other hand, except in children with chronic renal failure on conservative treatment. Under hemodialysis there was a significant relation to the number of blood transfusions given.