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Hyperthyroidism II: Pathophysiology

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...

Graves Disease II: Pathophysiology

Graves Disease II: Pathophysiology

Graves’ disease is an autoimmune disorder characterized by the production of thyroid-stimulating immunoglobulins (TSI) that activate TSH receptors, leading to excessive synthesis and release of thyroid hormones (T3 and T4) and resulting in hyperthyroidism.Among all causes of hyperthyroidism, Graves’ disease is the most common and can happen at any age, though it is more frequent in women. It produces a hypermetabolic state with features such as weight loss, tachycardia, tremor, and heat...

Hyperthyroidism I: Introduction

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 Hormones

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...

The Thyroid Gland

The Thyroid Gland

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.
The follicles have a central cavity lined by simple cuboidal to squamous epithelial cells called follicular cells. These cells produce the glycoprotein...

Graves' Disease I: Introduction

Graves' Disease I: Introduction

Graves' disease is an autoimmune disorder that causes hyperthyroidism, or overactivity of the thyroid gland. It results from autoantibodies called thyroid-stimulating immunoglobulins (TSIs), which bind to thyroid-stimulating hormone (TSH) receptors, leading to overstimulation of hormone production and a hypermetabolic state.EtiologyAlthough considered idiopathic, Graves’ disease has well-established contributing factors. There is a strong genetic component, with increased prevalence in...

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Related Experiment Video

Updated: May 7, 2026

Mixed Reality Assisted Radical Endoscopic Thyroidectomy

Mixed Reality Assisted Radical Endoscopic Thyroidectomy

Published on: January 31, 2025

Health technology assessment and thyroid surgery.

R Lucchini, A Sanguinetti, M Monacelli

Il Giornale Di Chirurgia

|October 5, 2013

Summary

Health Technology Assessment (HTA) evaluates new medical technologies. This study used HTA to compare the cost-effectiveness of ultrasonic dissectors in thyroid surgery, analyzing 440 thyroidectomy patients.

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Investigation of the Electrophysiological and Thermographic Safety Parameters of Surgical Energy Devices During Thyroid and Parathyroid Surgery in a Porcine Model

Investigation of the Electrophysiological and Thermographic Safety Parameters of Surgical Energy Devices During Thyroid and Parathyroid Surgery in a Porcine Model

Published on: October 13, 2022

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Last Updated: May 7, 2026

Mixed Reality Assisted Radical Endoscopic Thyroidectomy

Mixed Reality Assisted Radical Endoscopic Thyroidectomy

Published on: January 31, 2025

Investigation of the Electrophysiological and Thermographic Safety Parameters of Surgical Energy Devices During Thyroid and Parathyroid Surgery in a Porcine Model

Investigation of the Electrophysiological and Thermographic Safety Parameters of Surgical Energy Devices During Thyroid and Parathyroid Surgery in a Porcine Model

Published on: October 13, 2022

Area of Science:

Health Economics
Surgical Technology
Health Technology Assessment

Background:

Rising healthcare costs driven by technological innovation and increased patient expectations necessitate strategic management of new medical technologies.
The National Health System plays a crucial role in guiding the adoption and development of new health technologies by setting priorities.
Health Technology Assessment (HTA) offers a multidisciplinary framework to evaluate the multifaceted implications of medical technologies.

Purpose of the Study:

To apply the Health Technology Assessment (HTA) method to analyze the ultrasonic focus dissector in thyroid surgery.
To compare the economic impact of using an ultrasonic dissector versus conventional methods in thyroidectomy procedures.

Main Methods:

Utilized the Health Technology Assessment (HTA) framework, focusing on technology, patient, organization, and economic factors.
Conducted a comparative cost analysis of thyroidectomy procedures with and without the ultrasonic dissector.
Analyzed a case study involving 440 patients who underwent thyroidectomy.

Main Results:

The study evaluated the cost-effectiveness of ultrasonic dissectors in thyroid surgery.
A detailed comparison of surgical procedure costs was performed for patients who underwent thyroidectomy with and without the ultrasonic dissector.

Conclusions:

The application of Health Technology Assessment (HTA) provides a systematic approach to evaluating new surgical technologies.
Cost-effectiveness analysis is essential for informed decision-making regarding the adoption of innovative medical devices like ultrasonic dissectors in thyroid surgery.