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Iron deficiency anaemia in Jamaican children, aged 1-5 years, with sickle cell disease / Anemia por deficiencia de hierro en los niños jamaicanos entre 1 y 5 años de edad, que padecen la enfermedad de células falciformes
King, L; Reid, M; Forrester, T. E.
  • King, L; The University of the West Indies. Tropical Medicine Research Institute. Sickle Cell Unit. Kingston. JM
  • Reid, M; s.af
  • Forrester, T. E; s.af
West Indian med. j ; 54(5): 292-296, Oct. 2005. ilus, graf
Article in English | LILACS | ID: lil-472831
ABSTRACT

OBJECTIVE:

The aim of this study was to determine, using a combination of measures, the prevalence of iron deficiency anaemia (IDA) in children under five years-of-age who have sickle cell disease (SCD) and attend the Sickle Cell Clinic (SCU) of the Tropical Medicine Research Institute. MATERIALS AND

METHODS:

Children with homozygous sickle cell anaemia (Hb SS) or doubly heterozygous for Hb S and Hb C (Hb SC) disease who had not received a blood transfusion within three months prior to the iron measurements, were enrolled. The diagnosis of IDA was made if transferrin saturation was less than 16with serum iron less than 10.7 micromol/l and a low mean corpuscular volume (MCV) for age.

RESULTS:

Twelve children (8.5), seven with Hb SS and five with Hb SC had IDA. Adjusting for genotype, children with IDA had significantly higher red blood cell (RBC) counts (4.3 x10(9)/l vs 3.0 x 10(9)/l, p < 0.001) and total iron binding capacity (TIBC) (65.6 micromol/l vs 55.2 micromol/l, p < 0.004) but significantly lower reticulocyte (retic) counts (7.8vs 12.2, p = 0.001) than children without IDA.

CONCLUSION:

Iron deficiency anaemia is a clinical problem which affects children with SCD in Jamaica. The higher RBC counts in the IDA group may be due to decreased haemolysis and increased red cell survival whilst the lower reticulocyte counts may be due to impaired erythropoiesis. These observations need to be extended by clinical studies to establish improved diagnostic measures for IDA in SCD. Additionally, clinical trials are needed to determine whether treatment of IDA in children with SCD reduces morbidity and is associated with clinical benefits such as improvements in neurocognitive function.
RESUMEN

OBJETIVO:

El objetivo de este estudio fue determinar – mediante una combinacion de medidas – la prevalencia de anemia por deficiencia de hierro (ADH) en ninos menores de cinco anos de edad que padecen la enfermedad de celulas falciformes (ECF), y asisten a la Clinica de Celulas Falciformes (CCF) del Instituto de Investigacion de Medicina Tropical. MATERIALES Y

MÉTODOS:

Se inscribieron ninos con anemia de celulas falciformes homocigoticas (Hb SS) o enfermedad doble heterocigoto por Hb S y Hb C (Hb SC), que no habian recibido transfusion de sangre por un periodo de tres meses antes de las mediciones de hierro. Se diagnosticaba ADH si la saturacion de la transferrina era menos del 16%, con hierro en suero inferior a 10.7 mol/l, y un volumen corpuscular medio (VCM) bajo para la edad.

RESULTADOS:

Doce ninos (8.5%), siete con Hb SS y cinco con Hb SC presentaban ADH. despues del ajuste de las diferencias en el genotipo, los ninos con ADH tuvieron conteos de globulos rojos (RBC) (4.3 x109/l vs 3.0 x 109/l, p < 0.001), y capacidad total de fijacion del hierro (TIBC) (65.6 mmol/l vs 55.2 mmol/l, p < 0.004) significativamente mas altos, pero conteos de reticulocitos (7.8% vs 12.2%, p = 0.001) significativamente mas bajos que los ninos sin ADH.

CONCLUSIÓN:

La anemia por deficiencia de hierro es un problema clinico que afecta a los ninos con ECF en Jamaica. El hecho de que los conteos de RBC sean mas altos en los grupos con ADH, puede deberse a una disminución de la hemólisis y un aumento de la upervivencia de glóbulos rojos, en tanto que los conteos más bajos de reticulocitos pueden deberse a problemas de eritropoyesis. Estas observaciones necesitan ser ampliadas mediante estudios clínicos para establecer las medidas de diagnóstico mejoradas para ADH en ECF. Además de ello, se requieren ensayos clínicos a fin de determinar si el tratamiento de ADH en niños con ECF reduce la morbosidad y se halla asociado con beneficios clínicos...
Subject(s)
Full text: Available Index: LILACS (Americas) Main subject: Anemia, Iron-Deficiency / Anemia, Sickle Cell Type of study: Etiology study / Incidence study / Observational study / Prevalence study / Prognostic study Limits: Female / Humans / Male Country/Region as subject: English Caribbean / Jamaica Language: English Journal: West Indian med. j Journal subject: Medicine Year: 2005 Type: Article Affiliation country: Jamaica Institution/Affiliation country: The University of the West Indies/JM

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Full text: Available Index: LILACS (Americas) Main subject: Anemia, Iron-Deficiency / Anemia, Sickle Cell Type of study: Etiology study / Incidence study / Observational study / Prevalence study / Prognostic study Limits: Female / Humans / Male Country/Region as subject: English Caribbean / Jamaica Language: English Journal: West Indian med. j Journal subject: Medicine Year: 2005 Type: Article Affiliation country: Jamaica Institution/Affiliation country: The University of the West Indies/JM