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Anti-Tg Antikoru
Tiroglobulin (Tg), tiroid foliküler hücrelerinde bulunan ve temel tiroid hormonlarının biyosentezinde kritik bir rol oynayan bir glikoproteindir. Anti-Tg antikorunun ölçümünün Hashimoto tiroiditi ve Graves hastalığının teşhisine yardımcı olduğu gösterilmiştir. Siemens anti-Tg antikor testi, serum veya plazmada anti-Tg antikorunun kesin, nicel bir belirlemesini sağlar.
Anti-TPO Antikoru
Tiroid foliküler hücrelerinde bulunan bir protein olan anti-tiroid peroksidaz antikoru (anti-TPO antikoru), temel tiroid hormonlarının sentezinde bir katalizördür. Otoimmün tiroid hastalıkları, anti-TPO antikorunun varlığı ile karakterize edilir.
Yüksek anti-TPO antikor seviyeleri aşağıdakiler için bir risk faktörüdür:
Hashimoto tiroiditi, Graves hastalığı, atrofik tiroidit ve primer miksödem dahil olmak üzere otoimmün tiroid hastalığı
Kadınlarda doğum sonrası tiroidit
Siemens anti-TPO antikor testi, kemilüminesan teknolojisini kullanan rekabetçi bir immünolojik testtir. Anti-TPO Ab2'nin tespiti için oldukça hassas bir testtir ve laboratuvarcılara serum veya plazmada doğru, kantitatif anti-TPO antikoru tayini sağlar.
Ücretsiz T3
Triiyodotironin (T3), tiroid bezinden sentezlenip salgılanan ve T4'ün periferik deiyodinasyonu ile oluşan bir hormondur. T3 metabolizmanın düzenlenmesinde önemli bir rol oynar.
Dolaşımda, T3'ün %99,7'si geri dönüşümlü olarak taşıyıcı proteinlere bağlanır. Bağlanmamış T3 (Serbest T3) metabolik olarak aktiftir.
Free T3 testi, tiroidin düzgün çalışıp çalışmadığını belirlemeye yardımcı olur. Öncelikle hipertiroidizmin teşhisine yardımcı olmak için istenir ve bilinen bir tiroid bozukluğu olan bir hastanın ilerlemesini izlemeye yardımcı olmak için de istenebilir.
Serbest T3 testi genellikle anormal bir TSH ve T4 testinin ardından istenir. Hipertiroidizmin en yaygın nedeni olan bir otoimmün bozukluk olan Graves hastalığının teşhisine yardımcı olmak için tiroid antikorları ile birlikte ücretsiz T3 testi istenebilir.
Free T4
Thyroxine (T4) is a hormone synthesized and secreted by the thyroid gland and plays an important role in regulating metabolism. In the circulation, 99.95% of T4 is reversibly bound to transport proteins. The remaining T4 is not bound to transport proteins, but is free in the circulation. This unbound fraction, free T4, is metabolically active. An appropriate FT4 assay used in combination with TSH is considered by the American Thyroid Association to be “…the best and most efficient combination of blood tests for the diagnosis and follow-up of most patients with thyroid disorders.” (http://jama.ama-assn.org)
Intact PTH
Intact PTH is intended as an aid in the differential diagnosis of hyperparathyroidism, hypoparathyroidism, or hypercalcemia of malignancy. Siemens' Intact PTH assay provides the quality and specificity necessary in the management of patients with diseases of the parathyroid gland.
T Uptake
Also known as T3 Resin Uptake (T3RU) or Thyroid Uptake, this test estimates how much thyroid hormone-binding proteins are available in the blood through a calculation based on levels of T3 or T4 added to a patient’s blood sample.
TBG
Thyroxine-binding globulin (TBG) binds thyroid hormones in circulation. It is one of three proteins responsible for carrying T3 and T4 into the bloodstream. TBG tests are sometimes used in finding the reason for elevated or diminished levels of thyroid hormone.
Thyroglobulin
The most important characteristic of a Thyroglobulin assay is how reliably the assay discriminates between the assay’s functional sensitivity and the lower limit of the normal reference range – signaling residual thyroid tissue after thyroid ablation.
Thyroglobulin aids in monitoring patients who have undergone thyroidectomy. Siemens offers an automated and reliable Thyroglobulin test that exceeds the high-performance characteristics necessary for identifying the presence or absence of functioning thyroid tissue.
Total T3
For quantitative measurement of total triiodothyronine (T3) hormone in human serum and plasma. Measurements of T3 are used in the diagnosis and treatment of thyroid diseases such as hyperthyroidism and T3-thyrotoxicosis.
Total T4
Total T4 is a hormone used to help diagnose hyper- and hypothyroidism. The Total T4 test is usually ordered with a TSH test to help determine whether the thyroid hormone feedback system is functioning properly, and the results help to distinguish between causes of hyper- and hypothyroidism.
TSH
Thyroid-stimulating hormone (TSH) stimulates the thyroid gland to synthesize and secrete thyroid hormone. TSH serum measurements are used to detect primary hypo- and hyperthyroidism. The capability of a TSH assay to distinguish between normal and subnormal concentrations is essential for thyroid testing strategy. Quantification of TSH at a lower value of 0.01 mlU/L yields information that is useful to clinicians referring patients with subnormal TSH concentrations. Siemens’ TSH assays consistently deliver sensitive, highly specific results, across multiple platforms.
3rd Generation TSH
Improvements in the sensitivity of TSH assays allow it to be used for detecting both hyper- and hypothyroidism. Assays with a functional sensitivity of <0.02 mIU/L are classified as “third generation” assays. The 3rd Generation TSH assay from Siemens is sensitive and precise, with imprecision performance that exceeds the criteria recommended by the NACB for TSH methods.
TSI
TSI measurements are also used to monitor the response to Graves' disease therapy and prediction of remission or relapse, confirming Graves' ophthalmopathy, and for predicting neonatal thyroid hyperthyroidism.1,2 Incorporating the TSI assay into existing diagnostic algorithms has been shown to reduce overall direct costs of GD diagnosis by up to 43%, with the net cost of avoiding misdiagnosis reduced by up to 85%.3
The IMMULITE® 2000/2000 XPi TSI assay is the first automated and quantitative TSI assay available today. TSH receptor antibody (TRAb) assays detect both thyroid blocking and stimulating antibodies. However, blocking antibodies inhibit TSH stimulation of thyroid cells and lead to hypothyroidism. The IMMULITE 2000/2000 XPi TSI assay detects thyroid stimulating antibodies, the specific cause of GD pathology, with a clinical sensitivity and specificity of 98.6% and 98.5% respectively. With a 65-minute total assay time and ready-to-use, stable reagents, the use of this assay can make the differential diagnosis of GD faster and easier, allowing patients to be diagnosed and treated sooner.