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Synthesis and Regulation of Thyroid Hormones01:20

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Low blood levels of the thyroid hormones — triiodothyronine (T3) and thyroxine (T4) — signal the hypothalamus to release the thyrotropin-releasing hormone (TRH). TRH then reaches the pituitary gland and stimulates the release of thyroid-stimulating hormone(TSH) into the bloodstream.
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Iodometry and iodimetry are analytical methods used to determine the concentration of oxidizing or reducing agents using iodine. In iodometric titrations, the oxidizing analyte solution is usually acidified and treated with an excess of iodide ions, which generates an equivalent amount of iodine in equilibrium with triiodide. The released iodine is subsequently titrated directly against a standardized reducing agent. As the dilute iodine color becomes pale yellow, a few drops of freshly...
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The thyroid hormone (TH) plays a pivotal role in the intricate orchestration of physiological processes, exerting profound effects on development, metabolism, and homeostasis throughout different life stages.
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The Thyroid Gland01:23

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The thyroid gland is a small, butterfly-shaped gland located in the neck and covers the anterior surface of the trachea. The gland has two lateral lobes connected by a thin tissue mass called the isthmus. Internally, each lobe comprises many small spherical structures known as thyroid follicles, surrounded by a network of blood vessels.
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Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model
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[Iodine-induced thyroid dysfunction].

F Eilsberger1, M Luster2, J Feldkamp3

  • 1Klinik für Nuklearmedizin, Universitätsklinikum Marburg, Baldingerstraße, 35043, Marburg, Deutschland. friederike.mueller@staff.uni-marburg.de.

Medizinische Klinik, Intensivmedizin Und Notfallmedizin
|June 26, 2020
PubMed
Summary
This summary is machine-generated.

Iodine-induced thyroid dysfunction, though rare, requires prompt recognition. Treatment for iodine-induced hyperthyroidism involves antithyroid drugs and perchlorate, with prophylaxis recommended for high-risk individuals.

Keywords:
AmiodaroneContrast agentsHyperthyroidismThiamazoleThyroid storm

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Area of Science:

  • Endocrinology
  • Thyroidology

Background:

  • Iodine-induced thyroid dysfunction, while uncommon, presents significant clinical challenges.
  • Key triggers include iodine-containing contrast agents, amiodarone, and disinfectants.
  • Distinguishing between hypothyroidism and hyperthyroidism is crucial, as hypothyroidism is typically self-limiting.

Purpose of the Study:

  • To review current knowledge on the pathogenesis of iodine-induced thyroid dysfunction.
  • To outline therapeutic strategies for managing iodine-induced thyroid dysfunction.
  • To discuss methods for preventing iodine-induced thyroid dysfunction.

Main Methods:

  • A comprehensive literature search of recent publications was conducted.
  • Findings were integrated with practical clinical experience.

Main Results:

  • Iodine-induced hyperthyroidism management focuses on reducing thyroid hormone synthesis and iodine uptake.
  • Antithyroid drugs and perchlorate are primary therapeutic agents for hyperthyroidism.
  • Prophylaxis for contrast agent-induced hyperthyroidism may involve perchlorate and antithyroid drugs.

Conclusions:

  • Prompt diagnosis and management of iodine-induced thyroid dysfunction are essential.
  • Therapeutic strategies aim to mitigate thyroid hormone overproduction and iodine accumulation.
  • Prophylactic measures are vital for high-risk patients undergoing procedures involving iodine exposure.