The thyroid gland, a tiny, butterfly-shaped organ located at the front of our neck, is the master switch of our metabolism. By secreting thyroid hormones, it regulates energy expenditure, heart rate, body temperature, and even mood. Total thyroxine (TT4) is a crucial and widely used indicator for assessing thyroid function. As a professional medical testing company, we understand the profound significance of accurate TT4 testing for clinical diagnosis.
What is Total Thyroxine (TT4)?
Thyroxine (T4) is one of the primary hormones secreted by the thyroid gland, accounting for approximately 90% of its total production. In the blood, the vast majority of T4 is bound to specific proteins (primarily thyroxine-binding globulin (TBG)) and exists in a “bound” form. Only a very small amount (approximately 0.03%) is free, referred to as free T4 (FT4). The total thyroxine (TT4) test measures the sum of bound and free T4 in the blood.
Although direct measurement of free T4 (FT4) better reflects the immediate functional status of the thyroid gland, TT4 testing remains an important component of thyroid function screening and monitoring due to its high stability and mature technology. It can provide a macroscopic view of the total amount of thyroid hormone “reservoir”.
Why is a TT4 Test Performed?
TT4 test is one of the core items of thyroid function test (thyroid function), usually combined with TSH (thyroid stimulating hormone), T3 and other indicators, mainly used for:
- Assess Thyroid Status: Help diagnose hyperthyroidism (overactive thyroid) or hypothyroidism (underactive thyroid). TT4 levels are typically elevated in hyperthyroidism and decreased in hypothyroidism.
- Monitor Treatment Efficacy:For patients undergoing treatment for hyper- or hypothyroidism, regular TT4 testing helps assess whether medication dosage is appropriate and guides treatment adjustments.
- Aid in Diagnosing Thyroid-Related Disorders:Such as thyroiditis or thyroid nodules.
- Manage Thyroid Health During Pregnancy:Thyroid health is crucial for both mother and baby during pregnancy, and TT4 is a standard indicator in prenatal thyroid function monitoring.
Accurate testing, trusted expertise: our total thyroxine test kit
An accurate test report is the foundation for clinicians to make correct diagnoses and formulate treatment plans. Therefore, the quality and performance of test reagents are of paramount importance. Our company is committed to the research, development, and production of high-standard, highly sensitive in vitro diagnostic reagents.
Our total thyroxine test reagents use advanced detection principles and have the following outstanding advantages:
- High Precision and Sensitivity: Capable of accurately distinguishing minute concentration changes, ensuring reliable results and effectively avoiding false positives or negatives.
- Excellent Stability: Low intra-assay and inter-assay variation ensures consistency and comparability of results across different runs and over time.
- High Testing Throughput:Compatible with Immunoassay analzyer WIZ-A101, enabling rapid reporting to meet the needs of efficient clinical diagnosis.
- Comprehensive Quality Control System:Every batch of reagent undergoes strict quality control from raw materials to finished product, ensuring that every test result is trustworthy.
This reagent embodies our commitment to “Precision Medicine,” aiming to provide stable and reliable testing tools for healthcare institutions at all levels, working together to safeguard public thyroid health.
Conclusion
As a barometer of thyroid function, total thyroxine (TT4) holds undeniable clinical value. When you or your patients require a thyroid function assessment, please pay attention to this key indicator. We, with our precise and reliable total thyroxine testing reagents, are always working behind the scenes to safeguard every health report and provide a solid scientific basis for clinical diagnosis.
Post time: Oct-22-2025