Abstract

URQUIETA-MARQUEZ, Miguel Ángel; ROCHA-RIVEROS, Daysee Rita; MAMANI-ESCOBAR, Nancy  and  URQUIETA-MALDONADO, Miguel Ángel. Thyroid uptake of radioactive iodine 131 in 24 hours in eutiroid young adults residents at high altitude. Cuad. - Hosp. Clín. [online]. 2021, vol.62, n.1, pp.33-37. ISSN 1562-6776.

ABSTRACT INTRODUCTION: The thyroidexhibits a greatavidity forradioactive iodine (I¹³¹) which, when fixed by this gland, can be determined from the outside, taking advantage of the fact that gamma radiation passes through the soft tissues ofthe neckand can be registered (scintigraphy) at appreciable distances. Since 1962, Bolivia has had this technology, however, it does not have similar studies since the declaration of a country free of diseases secondary to iodine deficiency in 1997. The objective was to determine valúes of the thyroid uptake of I¹³¹ at 24 hours in euthyroid young adults, high altitude residents. METHOD: A descriptive cross-sectional study was carried out in 76 subjects obtained by intention and selected by means of a clinical interview, directed physical examination and informed consent. The procedure was carried out by qualified personnel at INAMEN, following IAEA recommendations. RESULTS: The valué ofthe thyroid uptake ofl¹³¹ in 24 hours was 18.23 + 5.79% (range 7.70 - 39.70). DISCUSSION: Experts recommend establishing up-to-date reference valúes in each región. Variations in normal valúes influenced by sex and age have been described; the latter, apparently due to a thyroid hypofunction inversely proportional to age. CONCLUSIÓN: The reference valué found in our study is consistent with those established abroad, however, with an increased trend. It could be due to the chronological sequence of comparative studies in countries that had already established iodination policies earlier.

Keywords : Radioactive iodine; uptake; adult; euthyroid; height.

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