Triyodtironin (T3), erkin
Kod:9004|CPT:84481|LOINC:3051-0
| Kabi | Triyodtironin (T3), erkin |
|---|
Tahlil ma'lumotlari
Tadqiqot usuli
- Elektrokimyoluminessent immunoanaliz (ECLIA)
Kutilayotgan natija topshirish vaqti
1 kun
Maxsus tayyorlik
- Report any use of biotin (vitamin B7/B8, vitamin H, coenzyme R) and stop biotin for at least 72 hours before the blood draw.
- Infants younger than 1 year: hold feeds for 30–40 minutes before specimen collection.
- Do not eat for 2–3 hours before collection; drinking water is allowed.
- With clinician guidance, discontinue thyroid hormones and iodine-containing products for 72 hours prior to testing.
- With clinician guidance, avoid steroid hormones for 48 hours before testing.
- Minimize vigorous physical activity and emotional stress for 24 hours prior to collection.
- Do not smoke during the 3 hours before the sample is obtained.
Qanday foydalanish
Triyodtironin (T3), erkin (Erkin T3; erkin triyodtironin) qalqonsimon bez funksiyasini baholash va gumon qilingan qalqonsimon bez kasalliklarini TSH va boshqa qalqonsimon bez testlari bilan birga talqin qilish uchun qo‘llaniladi. Oqsillarga bog‘lanmagan erkin gormonni o‘lchash, bog‘lovchi oqsillardagi o‘zgarishlar umumiy T3 konsentratsiyalarini o‘zgartirganida ayniqsa foydalidir. Ushbu test odatiy qalqonsimon bez baholashida, TSH bilan birga qalqonsimon bez kasalligi uchun terapiyani kuzatishda, shuningdek homiladorlikda va qalqonsimon bez kasalligi bo‘lgan onalardan tug‘ilgan neonatlarda qalqonsimon bez holatini tekshirishda qo‘llab-quvvatlaydi.
Cheklovlar
Erkin triyodtironin — T3 ning oz miqdordagi, qalqonsimon gormonlarni bog‘lovchi globulin, transtiretin yoki albumin tomonidan tashilmaydigan bog‘lanmagan qismi. Faqat erkin fraksiya hujayralarga kira olishi va qalqonsimon gormon retseptorlarini faollashtirishi mumkin bo‘lgani sababli, bog‘lovchi oqsillar konsentratsiyalari o‘zgargan sharoitlarda Erkin T3 umumiy T3 ga nisbatan biologik faollikni yaxshiroq aks ettiradi. Fiziologik va klinik holatlar, masalan homiladorlik, bog‘lovchi oqsillar darajasini o‘zgartirib, erkin gormon bilan parallel bo‘lmagan holda umumiy T3 ni oshirishi yoki pasaytirishi mumkin. Bunday vaziyatlarda va mavjud qalqonsimon bez kasalligi boshqaruvi davomida Triyodtironin (T3), erkin ni TSH va boshqa qalqonsimon bez testlari bilan birga talqin qilish qalqonsimon bez holatini baholashni yaxshilaydi. Streptavidin–biotin kapture usulidan foydalanuvchi immunoanalizlar yaqinda biotinni yuqori dozalarda qabul qilishdan ta’sirlanishi mumkin; testdan oldingi biotin cheklovlariga rioya qilish noto‘g‘ri natijalar xavfini kamaytiradi.
| O'lchov birligi | pg/mL | ||||
|---|---|---|---|---|---|
| Referens oraliq |
| ||||
| Ko'rsatmalar | Assessment of possible thyrotoxicosis in patients with symptoms such as tachycardia, weight loss, insomnia, tremor, irritability, diarrhea, or ophthalmopathy., Evaluation of possible hypothyroidism in those with weight gain, xerosis, constipation, cold intolerance, edema, alopecia, or menstrual irregularity; in children, assessment of developmental delay., Thyroid function testing as part of periodic health evaluation in combination with TSH and related laboratory studies., Monitoring response to treatment for thyroid disease together with TSH., Pregnancy with known or suspected thyroid disease to identify abnormal thyroid hormone secretion., Early evaluation of thyroid status in neonates born to mothers with thyroid disease. |
Namunangiz talablari
| Namunangiz | Zardob |
|---|---|
| Container | Oltin/yo'lbars qopqoqli probirka (SST, gel ajratgich) |
| Hajm | 1 mL (min 0.7 mL) |
| Saqlash tayyorlik | Xona harorati, Sovutilgan, Muzlatilgan |
References
Albertini A, Ekins RP, eds. Free Hormones in Blood. Amsterdam, Holland: Elsevier Biomedical Press; 1982.
Parslow ME, Oddie TH, Fisher DA, et al. Evaluation of serum tri-iodothyronine and adjusted tri-iodothyronine (free tri-iodothyronine index) in pregnancy. Clin Chem. 1977 Mar;23(3):490-492. PubMed 402243