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Related Concept Videos

Functions of Thyroid Hormones01:18

Functions of Thyroid Hormones

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.
TH is indispensable for the normal development and maturation of the skeletal, muscular, and nervous systems during fetal and childhood growth. It facilitates bone mineral turnover and regulates protein synthesis in developing tissues, contributing significantly to overall growth and...
Hyperthyroidism I: Introduction01:25

Hyperthyroidism I: Introduction

Hyperthyroidism is a type of thyrotoxicosis characterized by the thyroid gland's overproduction of the thyroid hormones triiodothyronine (T3) and thyroxine (T4). This hormone excess increases the basal metabolic rate and enhances sensitivity to catecholamines.DiagnosisDiagnosis is based on clinical features and biochemical testing. It typically shows suppressed thyroid-stimulating hormone (TSH) levels below 0.4 mIU/L, with elevated free T3 and/or T4. Additional tests, including thyroid...
Synthesis and Regulation of Thyroid Hormones01:20

Synthesis and Regulation of Thyroid Hormones

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.
Upon reaching the thyroid gland, TSH stimulates the follicular cells' active uptake of iodide ions from the blood. The ions diffuse to the apical surface of the cells and are oxidized to iodine. The iodine is then...
Hyperthyroidism II: Pathophysiology01:27

Hyperthyroidism II: Pathophysiology

Hyperthyroidism is a hypermetabolic state caused by elevated levels of thyroid hormones, triiodothyronine (T3) and thyroxine (T4). It results from dysregulation at the thyroid, pituitary, or immune system level and affects multiple organ systems.PathophysiologyThe most common cause of hyperthyroidism is Graves’ disease, an autoimmune disorder in which antibodies, specifically thyroid-stimulating antibodies (TSAb), a subtype of TSH receptor antibodies (TRAb), bind to and activate TSH receptors...
Clinical Trials01:16

Clinical Trials

Clinical trials are prospective experimental studies conducted on humans to determine the safety and efficacy of treatments, drugs, diet methods, and medical devices. Using statistics in clinical trials enables researchers to derive reasonable and accurate conclusions from the collected data, allowing them to make wise decisions in uncertain situations. In medical research, statistical methods are crucial for preventing errors and bias.
There are four phases in a clinical trial. A phase one...
Hypothyroidism II: Pathophysiology01:23

Hypothyroidism II: Pathophysiology

Hypothyroidism is a disorder characterized by insufficient production of thyroid hormones, which regulate metabolism, energy balance, and multiple organ systems.TypesHypothyroidism is classified based on the level of dysfunction. Primary hypothyroidism results from intrinsic thyroid gland dysfunction, causing reduced hormone production despite normal or increased stimulation. Secondary hypothyroidism arises from inadequate thyroid-stimulating hormone (TSH) secretion by the pituitary. Tertiary...

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Related Experiment Video

Updated: May 11, 2026

Synchronous Triplanar Reconstruction Integrated with Color Doppler Mapping for Precise and Rapid Localization of Thyroid Lesions
05:41

Synchronous Triplanar Reconstruction Integrated with Color Doppler Mapping for Precise and Rapid Localization of Thyroid Lesions

Published on: February 9, 2024

The clinical use of thyroid function tests.

Gisah Amaral de Carvalho1, Camila Luhm Silva Perez, Laura Sterian Ward

  • 1Serviço de Endocrinologia e Metabologia, Hospital de Clínicas, Universidade Federal do Paraná, Curitiba, PR, Brasil. carvalho.gisah@gmail.com

Arquivos Brasileiros De Endocrinologia E Metabologia
|May 18, 2013
PubMed
Summary

Accurate diagnosis of thyroid disorders relies on laboratory tests like thyrotropin (TSH) and thyroid hormone levels. This analysis reviews key thyroid function tests, highlighting pitfalls for optimal clinical use.

Related Experiment Videos

Last Updated: May 11, 2026

Synchronous Triplanar Reconstruction Integrated with Color Doppler Mapping for Precise and Rapid Localization of Thyroid Lesions
05:41

Synchronous Triplanar Reconstruction Integrated with Color Doppler Mapping for Precise and Rapid Localization of Thyroid Lesions

Published on: February 9, 2024

Area of Science:

  • Endocrinology
  • Clinical Chemistry
  • Laboratory Medicine

Background:

  • Thyroid disorders affect numerous individuals, often presenting with subtle or nonspecific symptoms.
  • Accurate diagnosis and cost-effective management depend heavily on laboratory testing.
  • Biochemical tests are crucial for detecting thyroid dysfunction when clinical signs are ambiguous.

Purpose of the Study:

  • To critically analyze the appropriate utilization of essential thyroid function tests.
  • To review serum concentrations of thyrotropin (TSH), thyroid hormones, and antithyroid antibodies.
  • To provide recommendations for optimizing the use of these diagnostic tools.

Main Methods:

  • A comprehensive survey of the MedLine database was conducted.
  • Analysis focused on the appropriate use of key thyroid function tests.
  • Discussion includes common pitfalls and interferences encountered in daily practice.

Main Results:

  • Thyroid function tests, including TSH, thyroid hormones, and antibodies, are vital for diagnosis.
  • Subtle and unspecific symptoms necessitate reliable biochemical testing.
  • Identified pitfalls and interferences can impact test accuracy.

Conclusions:

  • Appropriate use of thyroid function tests is essential for accurate diagnosis.
  • Understanding potential pitfalls improves the reliability of diagnostic results.
  • Recommendations are provided to enhance the clinical application of thyroid testing.