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Maintien de la protection thyroidienne par l'iode stable chez l'adulte en cas d'exposition prolongée


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Verger, P.; Piechowski, J. Radioprotection (Apr-Jun 2000) v. 35(2) p. 246-247

Type de document > *Article de revue

Mots clés > évaluation/gestion des risques, accident, contre-mesures, iode

Unité de recherche > Laboratoire d'épidémiologie et d'analyse du détriment sanitaire (LEADS)

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Résumé

Ingestion of stable iodine (potassium iodide) offers an efficient protection against the irradiation of the thyroid when an accidental exposure to radioiodine occurs. This prophylaxis aims at obtaining a rapid and maximum thyroid protection without anti thyroid effects. The recommended posology is 100 mg of iodine in one time ( that is to say a tablet of 130 mg potassium iodide). After this single dose of iodine, the percentage of avoided radiation dose after 48 hours is near 75%, then decreases until 50% at 72 hours. It is possible to keep an efficient thyroid protection by taking a stable tablet of iodine on the first day, then a fourth of tablet the following days. This approach is an optimization allowing an efficient protection while reducing the eventual side effects linked to an excess of iodine. This protocol can be applied to adults, fifteen years or more adolescents, young adults and pregnant women. For children and babies there are not data to confirm the thyroid protection. The children constitute the most sensitize age group and this question should deserve to be thoroughly discussed.