733 results
Thyroid Function Tests (TFTs) and Interpretation

 • TSH, Free T4, Free T3
 • T3 Uptake
 •
Thyroid Function Tests ... Free T4, Free T3 ... • T3 Uptake ... FTI) • Reverse T3 ... Thyroid #Function #Tests
Thyroid Function Test Interpretation Table

TSH, Free T4, Free T3 and Associated Condition
#Diagnosis #Endocrinology #Hyperthyroid #Hypothyroid #Function
Thyroid Function Test ... Free T4, Free T3 ... Hypothyroid #Function #Tests
Approach to Thyroid Function Tests in the Evaluation of Hyperthyroidism
 • Low TSH, Low normal T4
Thyroid Function Tests ... normal T4 +/- T3 ... TSH, high T4 +/- T3 ... TSH, high T4 +/- T3
Hyperthyroidism (low TSH, High T4/T3) - Diagnostic Algorithm

Radioactive iodine scan – get if concern for nodular
low TSH, High T4/T3 ... Check pregnancy test
Laboratory Evaluation of Patients for Thyroid Disease 
Hyperthyroidism:
 • Graves disease - TSH low; free T4
in some cases, T3 ... low; free T4 and T3 ... low; free T4 and T3 ... low; free T4 and T3 ... low; free T4 and T3
Approach to the Diagnosis of Hyperthyroidism - Differential Diagnosis and Workup Algorithm

 • Secondary Hyperthyroidism (↑↔TSH,
↑↔TSH, ↑Total T3 ... (↓TSH, ↔Total T3 ... (↓TSH, ↑Total T3 ... (↔TSH, ↔Total T3
Pharmaceutical Management of Hyperthyroidism / Thyroid Storm
Beta-Blockers 
• Decreases sympathetic hyperactivity 
• Partially blocks peripheral conversion
conversion of T4 to T3 ... conversion of T4 to T3 ... conversion ofT4 to T3
Algorithm for the diagnostic workup of hyperthyroidism. (T3 = triiodothyronine; T4 = thyroxine; TSH = thyroid-stimulating
(T3 = triiodothyronine
Hyperthyroidism Overview

Clinical Manifestation of Hyperthyroidism:
 • Fatigue
 • Weight loss
 • Heat intolerance
 • Depression, nervousness
thyrotoxicosis • T3 ... TSH • ↑ Total T3 ... ↑ FT4 and/or ↑ T3 ... : Reduce T4 -> T3
The following graph was prepared based on the latest information on Testing for the Diagnosis of
bother doing any tests ... There are NO tests ... that the RNA PCR test ... If the RNA PCR test ... (aka Combo tests