Qaytarish

Triyodtironin (T3), umumiy

Kod:9003|CPT:84480|LOINC:3053-6

Sinonimlar
Т3 общийгормон щитовидной железыпроверка функции щитовидной железыфункция щитовидной железыThyroid function testThyroid hormoneTotal T3Total triiodothyronineTT3
KabiTriyodtironin (T3)

Tahlil ma'lumotlari

Tadqiqot usuli

  • Elektrokimyoluminessent immunoanaliz (ECLIA)

Kutilayotgan natija topshirish vaqti

1 kun

Maxsus tayyorlik

  • Avoid high‑dose biotin for at least 72 hours before the blood draw; document biotin use prior to testing.
  • For infants younger than 1 year, withhold feeding for 30–40 minutes before collection.
  • Do not eat for 2–3 hours before collection; water is allowed.
  • With clinician approval, hold steroid and thyroid hormone medications for 48 hours before testing.
  • Refrain from strenuous physical activity and significant emotional stress during the 24 hours before testing.
  • Do not smoke for 3 hours before collection.

Qanday foydalanish

Triyodtironin (T3), umumiy testi (umumiy triyodtironin yoki TT3) tireotoksikoz gumon qilinganda qalqonsimon bez funksiyasini baholash uchun qo'llanadi; T3-tireotoksikozda, T3 yuqori, T4 esa normal bo'lganda, ayniqsa foydali. U Grevs kasalligi va toksik tugunlar kabi sabablar bo'yicha gipertireozni diagnostik baholashni qo'llab-quvvatlaydi va TSH past (supressiyalangan), biroq standart qalqonsimon bez profili normal yoki chegaradosh bo'lganda ham ma'lumotlidir. T3 (liotironin) terapiyasini olayotgan bemorlarni monitoring qilishda qo'llanishi mumkin. Ayrim taqdimotlarda — izohlanmagan vazn yo'qotish, taxiaritmiyalar yoki T4 oshmagan fonida proksimal miopatiya — umumiy T3 qo'shimcha diagnostik kontekst bera oladi.

Cheklovlar

T3 to'qima darajasida kuchliroq qalqonsimon bez gormoni bo'lib, asosan T4 ning periferik deyodlanishi natijasida hosil bo'ladi. Qon aylanishida T3 ning katta qismi tiroksin-bog'lovchi globulin, transtiretin va albuminga bog'langan bo'ladi; 1% dan kam qismi erkin, biologik faol fraksiya ko'rinishida mavjud. Umumiy T3 bog'langan va erkin gormonni birgalikda aks ettirgani bois, bog'lovchi oqsillar darajasidagi o'zgarishlar o'lchanadigan konsentratsiyaga ta'sir qiladi. Umumiy T3 homiladorlikda va og'iz orqali qabul qilinadigan kontratseptivlar qo'llanganda oshadi; bog'lovchi oqsillar bilan bog'liq boshqa buzilishlar ham natijalarni o'zgartirishi mumkin. T3 konsentratsiyalari qalqonsimondan tashqari kasalliklarda va ochlikda kamayishi mumkin, va tiroksin vositachiligidagi tireotoksikozda zardob T3 darajasi normal bo'lib qolishi mumkin. Talqin klinik kontekst bilan korrelyatsiyani va bog'lovchi oqsillar darajasini o'zgartiradigan holatlar hamda terapiyalar haqida xabardorlikni talab qiladi.

O'lchov birliging/dL
Referens oraliq
YoshMinMaks
≤12mo0.82
Ko'rsatmalarLow (suppressed) TSH with a normal free T4, raising concern for T3 thyrotoxicosis., Symptoms and signs suggestive of thyrotoxicosis despite a normal free T4 (eg, tachycardia, weight loss, tremor, insomnia, ophthalmopathy)., Clinical features consistent with hypothyroidism (eg, weight gain, xerosis, constipation, cold intolerance, edema, alopecia, menstrual irregularity)., Isolated high total T4 in a clinically euthyroid individual, suggesting altered thyroxine‑binding globulin concentration.

Natija og'ishlarining mumkin sabablari

Oshgan daraja

  • amiodarone
  • antithyroid drugs
  • clofibrate
  • estrogens
  • lithium
  • methadone
  • multiple myeloma
  • oral contraceptives
  • phenothiazines
  • pregnancy
  • rifampin
  • severe liver disease
  • tamoxifen
  • terbutaline
  • valproic acid

Pasaygan daraja

  • amiodarone
  • anabolic steroids
  • androgens
  • antithyroid drugs
  • atenolol
  • carbamazepine
  • cimetidine
  • coumarin derivatives
  • dexamethasone
  • fasting
  • furosemide
  • lithium
  • nonthyroidal illness
  • propranolol
  • salicylates
  • theophylline

Namunangiz talablari

NamunangizZardob
ContainerOltin/yo'lbars qopqoqli probirka (SST, gel ajratgich)
Hajm1 mL (min 0.7 mL)
Saqlash tayyorlikXona harorati, Sovutilgan, Muzlatilgan

References

Greenspan FS, Rapoport B. Thyroid gland. In: Greenspan FS, Forsham PH, eds. Basic and Clinical Endocrinology. Los Altos, Calif: Lange Medical Publications;1983:153.

Ingbar SH. Diseases of the thyroid. In: Braunwald E, Isselbacher KJ, Petersdorf RG, et al, eds. Harrison's Principles of Internal Medicine. 11th ed. New York, NY: McGraw-Hill; 1987:1732-1752.

Takamatsu J, Kuma K, Mozai T. Serum tri-iodothyronine to thyroxine ratio: A newly recognized predictor of the outcome of hyperthyroidism due to Graves' disease. J Clin Endocrinol Metab. 1986 May; 62(5):980-983. PubMed 3754263

Watts NB, Keffer JH. Practical Endocrine Diagnosis. 4th ed. Philadelphia, Pa: Lea & Febiger;1989.

Лифшиц В.М. Биохимические анализы в клинике : справочник / В.М. Лифшиц, В.И. Сидельникова ; 2-е изд. – М. : Медицинское информационное агентство, 2001. – 303 с.

Назаренко Г.И. Клиническая оценка результатов лабораторных исследований / Г.И. Назаренко, А.А. Кишкун – М. : Медицина, 2006 – 543 с.

Wallach J. Interpretation of Diagnostic Tests / J. Wallach ; 7th ed. – Philadelphia,PA: Lippincott Williams & Wilkins, 2000. – 1026 pp.

McGraw-Hill Manual of laboratory & diagnostic tests / D.D. Wilson ; 1 ed. – McGraw-Hill Professional, 2007. – 608 pp.

Chernecky C.C. Laboratory tests and diagnostic procedures / C.C. Chernecky, B.J. Berger; 5th ed. – Saunder Elsevier, 2008. – 1232 pp.