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Related Concept Videos

Graves' Disease I: Introduction01:28

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...
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...
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...
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...
Errors occurring during blood pressure monitoring01:25

Errors occurring during blood pressure monitoring

Blood pressure monitoring is a crucial clinical procedure in diagnosing and managing various cardiovascular conditions. Despite its significance, the accuracy of blood pressure measurements can be compromised by multiple factors, potentially leading to either falsely high or low readings. These inaccuracies are critical as they can significantly impact patient care. So, it is vital to understand these challenges deeply and adopt strategic approaches to minimize errors.
Several factors...
Graves Disease II: Pathophysiology01:24

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...

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A Versatile, Behavioral Method to Investigate Thyroid Hormone Effects on Cerebellar Function
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Published on: October 6, 2023

Finding blunders in thyroid testing: experience in newborns.

Laurel J Zilka1, John A Lott, Lula C Baker

  • 1The Ohio Department of Health Newborn Screening Laboratory, Reynoldsburg, Ohio 43210, USA.

Journal of Clinical Laboratory Analysis
|July 16, 2008
PubMed
Summary

This study analyzed newborn screening data for thyroxin (T4) and thyroid-stimulating hormone (TSH), identifying 18 potential errors in 600,000 screenings. The findings highlight the importance of rigorous data monitoring to prevent misdiagnoses of congenital hypothyroidism.

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Published on: April 7, 2023

Area of Science:

  • Neonatal screening
  • Endocrinology
  • Clinical laboratory science

Background:

  • Newborn screening programs are crucial for early detection of congenital disorders.
  • Thyroid disorders, such as primary congenital hypothyroidism (PCH), require timely diagnosis and treatment.
  • Accurate laboratory testing and data interpretation are essential for effective newborn screening.

Purpose of the Study:

  • To evaluate the accuracy of newborn screening data for thyroxin (T4) and thyroid-stimulating hormone (TSH).
  • To identify potential errors, including missing values and misinterpretations, in a large cohort of newborn screening results.
  • To assess the rate of errors in T4 and TSH testing and its implications for diagnosing primary congenital hypothyroidism (PCH).

Main Methods:

  • Analysis of thyroxin (T4) and thyroid-stimulating hormone (TSH) data from 600,000 newborns.
  • Utilized standard blood-spot-on-filter paper methods and time-resolved fluoroimmunoassay for T4 and TSH quantitation.
  • Applied pattern recognition techniques to identify questionable test result combinations, missing values, and potential data misinterpretations.

Main Results:

  • Identified 56 cases of confirmed primary congenital hypothyroidism (PCH) among 600,000 newborns.
  • Detected 18 sets of inconsistent or erroneous results, including missing values, within the same cohort.
  • Found that missing test results were often due to oversight, suggesting a need for improved data handling protocols.

Conclusions:

  • The error rate of approximately 18 mistakes per 600,000 babies may be considered low but necessitates continuous monitoring.
  • All errors in newborn screening are unacceptable due to the severe consequences of misdiagnosed thyroid disorders.
  • Intense data monitoring and efforts to progressively reduce error rates are recommended to ensure the reliability of newborn screening for PCH.