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    AI Overview
    Free T3 (FT3) Rapid Test Kit - Vitrosens Biotechnology
    The Free T3 (fT3/FT3) rapid test is a fluorescence-based immunoassay designed for the quick, quantitative measurement of unbound triiodothyronine in human serum, plasma, or whole blood. It serves as a rapid diagnostic tool, providing accurate results in roughly 15 minutes to aid in the assessment of thyroid function, particularly for detecting hyperthyroidism, thyrotoxicosis, and monitoring thyroid medication dosages. 
    Key Aspects of the FT3 Rapid Test 
    • Purpose: Measures the biologically active form of T3, which acts directly on tissues and is around four times more potent than T4. 
    • Clinical Utility: Used to diagnose thyroid disorders, specifically in cases where free T3 levels are needed because total T3 is affected by binding protein variations. 
    • Time-Sensitive: Results are available in 15 minutes, making it suitable for rapid clinical evaluation. 
    • Procedure: A small sample (e.g.,
      75
      𝜇
      L
      ) of blood, serum, or plasma is applied to a test cartridge, which is then read by a fluorescence immunoassay (FIA) analyzer to provide quantitative results.       
    • Reference Range: Common reference ranges are roughly
      2.82.8
      2.8
      –
      7.1
      pmol/L
       (
      1.81.8
      1.8
      –
      4.6
      pg/mL
      ), though these can vary by manufacturer.       
    Advantages and Limitations 
    • Advantages: Rapid, user-friendly, and independent of fluctuations in binding proteins (unlike Total T3 tests).
    • Limitations: Primarily for professional use in clinics; cannot independently determine the exact cause of an underlying condition without further testing.
    • Storage: Most test kits allow for room temperature storage (4–30°C) for up to 24 months. 
    Indications for Testing 
    • Hyperthyroidism/Graves' Disease: High levels of FT3 are key indicators.
    • Monitoring Treatment: Used for managing thyroid hormone therapy.
    • Symptoms: Used when a patient presents with symptoms such as unexplained weight changes, rapid heart rate, or fatigue. 
    • Xiamen Biotime Biotechnology Co., Ltd.https://www.xiamenbiotime.com
      FT3 Rapid Quantitative Test (Chemiluminescence Immunoassay)
      FT3 Rapid Quantitative Test (Chemiluminescence Immunoassay) * The results of free T3 (FT3) measurement are important indicators fo...
    • MedlinePlus (.gov)https://medlineplus.gov
      Triiodothyronine (T3) Tests: MedlinePlus Medical Test
      Jan 10, 2024 — What is a triiodothyronine (T3) test? A triiodothyronine (T3) test measures the level of T3 in a sample of your blood. It's used t...
    • Vitrosens Biotechnologyhttps://vitrosens.com
      Free T3 (FT3) Rapid Test Kit - Vitrosens Biotechnology
      This kit is designed for in vitro quantitative measurement of the concentration of free triiodothyronine (FT3) in human serum, pla...
    Show all
    • Xiamen Biotime Biotechnology Co., Ltd.https://www.xiamenbiotime.com
      FT3 Rapid Quantitative Test (Chemiluminescence Immunoassay)
      FT3 Rapid Quantitative Test (Chemiluminescence Immunoassay) * The results of free T3 (FT3) measurement are important indicators fo...
    • MedlinePlus (.gov)https://medlineplus.gov
      Triiodothyronine (T3) Tests: MedlinePlus Medical Test
      Jan 10, 2024 — What is a triiodothyronine (T3) test? A triiodothyronine (T3) test measures the level of T3 in a sample of your blood. It's used t...
    • Vitrosens Biotechnologyhttps://vitrosens.com
      Free T3 (FT3) Rapid Test Kit - Vitrosens Biotechnology
      This kit is designed for in vitro quantitative measurement of the concentration of free triiodothyronine (FT3) in human serum, pla...
    • Xiamen Wiz Biotech Co., Ltdhttps://www.wizbiotech.net
      Supply Sensitive T3 Hyperthyroidism Diagnostic Marker FT3 Free ...
      Sensitive T3 Hyperthyroidism Diagnostic Marker FT3 Free Triiodothyronine Blood Test. ... This ft3 test kit is suitable for quantit...
    • Cleveland Clinichttps://my.clevelandclinic.org
      Triiodothyronine (T3) Test: What It Is, Function & Levels
      Feb 14, 2022 — T3 (Triiodothyronine) Test. Medically Reviewed. Last updated on 02/14/2022. A T3 (triiodothyronine) test is a blood test that help...
    • Xiamen Biotime Biotechnology Co., Ltd.https://www.xiamenbiotime.com
      FT3 test - Xiamen Biotime Biotechnology Co., Ltd.
      The Biotime FT3 Rapid Quantitative Test is intended to quantify the concentration of FT3 in human serum on the Biotime FIA Analyze...
    • Anbio Biotechnologyhttps://www.anbio.com
      FT3 Rapid Test Kit
      The FT3 Rapid Test Kit along with Anbio FIA Meter is a fluorescence immunoassay for quantitative measurement of Free Triiodothyron...
    • Humanitas.nethttps://www.humanitas.net
      Free triiodothyronine (FT3) - Humanitas.net
      How is the exam performed? The exam is performed through a simple blood sample test. Whether the FT3 hormones are increased or dec...
    • Rite Aidhttps://riteaid.com
      Thyroid Health | T3, Free Blood Test - Rite Aid
      Apr 25, 2026 — Low free T3 often causes persistent fatigue, unexplained weight gain, difficulty losing weight, brain fog, poor concentration, dep...
    • Wondfohttps://en.wondfo.com
      Finecare™ Thyroid Function Rapid Quantitative Test - Wondfo
      Mar 13, 2023 — 75. µL. Reaction. Time. 15. minutes. 0.61~9.22 nmol/L. (0.4~6.0 ng/mL) 0.40-50.00 pmol/L. or 0.26-32.55 pg/mL. 1.00-100 pmol/L. or...
    • YouTubehttps://www.youtube.com
      Wondfo Finecare™ fT3 Rapid Quantitative Test | UNBOXING
      The Finecare™ fT3 Rapid Quantitative Test is a fluorescence immunoassay used along with Finecare™ FIA Meters for quantitative dete...
    • Labcorp OnDemandhttps://www.ondemand.labcorp.com
      Free T3 Blood Test for Thyroid Function
      You may want to consider testing your free T3 level if you are experiencing symptoms of hyperthyroidism such as fatigue, trouble s...
    This is for informational purposes only. For medical advice or diagnosis, consult a professional. AI responses may include mistakes. Learn more
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    Web results

    thyroid function cFT3 fFT3 rapid test


    Nanjing Poclight Biotechnology Co., Ltd
    https://www.poclightbio.com › thyroid-function-cft3-fft3...
    Nanjing Poclight Biotechnology Co., Ltd
    https://www.poclightbio.com › thyroid-function-cft3-fft3...
    Veterinary free Triiodothyronine (cFT3/fFT3) Test Kit, this kit is designed for the quantitative determination of free triiodothyronine (FT3) in canine/feline ...Read more

    FT3 Rapid Test Kit


    Anbio Biotechnology
    https://www.anbio.com › product › fia › Hormone › FT3...
    Anbio Biotechnology
    https://www.anbio.com › product › fia › Hormone › FT3...
    The FT3 Rapid Test Kit along with Anbio FIA Meter is a fluorescence immunoassay for quantitative measurement of Free Triiodothyronine (FT3) in human serum ...Read more
    Missing: cFT3 ‎fFT3

    Triiodothyronine (T3) Test: What It Is, Function & Levels


    Cleveland Clinic
    https://my.clevelandclinic.org › health › diagnostics › 2...
    Cleveland Clinic
    https://my.clevelandclinic.org › health › diagnostics › 2...
    Feb 14, 2022 — A T3 (triiodothyronine) test is a blood test that helps diagnose thyroid conditions, specifically hyperthyroidism.Read more
    Missing: cFT3 ‎fFT3
    People also ask
    What is the difference between free T3 T4 and T3 T4 TSH test?
    Key Differences Between TSH, Free T4, and Free T3 Tests

    TSH measures the level of thyroid-stimulating hormone from the pituitary gland, indicating how well it regulates the thyroid. Free T4 and Free T3 measure the actual levels of thyroid hormones in the blood, providing insight into the thyroid's hormone production.

    Understanding Thyroid Function Tests: TSH, Free T4, and Free T3


    Orange Health Labs
    https://www.orangehealth.in › blog › understanding-thyr...
    Orange Health Labs
    https://www.orangehealth.in › blog › understanding-thyr...
    How do you feel when your T3 is low?
    An error has occurred. Please try again later.
    Why don't doctors test T3?
    An error has occurred. Please try again later.

    Ask anything in AI Mode

    Explain TSH's role in thyroid function
    Tell me about hyperthyroidism symptoms
    List specific situations for T3 testing
    Which test is better, FT3 or T3?
    FT3 is generally considered more clinically relevant for assessing thyroid function because it specifically measures the biologically active, unbound form of T3. It is often the preferred test for diagnosing and managing thyroid disorders, especially when symptoms or clinical indications suggest thyroid dysfunction.Nov 1, 2023

    Which is better TT3 or FT3 – An analysis - Agappe


    Blogs Detail page
    https://www.agappe.com › blog-details › which-is-better-...
    Blogs Detail page
    https://www.agappe.com › blog-details › which-is-better-...

    Web results

    How reliable are free thyroid and total T3 hormone assays?


    PubMed Central (PMC) (.gov)
    https://pmc.ncbi.nlm.nih.gov › articles › PMC5113291
    PubMed Central (PMC) (.gov)
    https://pmc.ncbi.nlm.nih.gov › articles › PMC5113291
    by KJ Welsh · 2016 · Cited by 158 — Multiple studies show falsely normal values for T3, FT3, and FT4 by immunoassay that are below the reference interval when measured by (ultrafiltration) LC- ...Read more
    Missing: cFT3 ‎fFT3

    Triiodothyronine (T3) Tests


    MedlinePlus (.gov)
    https://medlineplus.gov › Medical Tests
    MedlinePlus (.gov)
    https://medlineplus.gov › Medical Tests
    Jan 10, 2024 — This test measures triiodothyronine (T3) in your blood. Your thyroid gland makes T3. The test is mainly used to diagnose hyperthyroidism.
    Missing: rapid ‎| Show results with: rapid

    Finecare™ Thyroid Function Rapid Quantitative Test


    Wondfo
    https://en.wondfo.com › vancheerfile › files
    Wondfo
    https://en.wondfo.com › vancheerfile › files
    PDF
    Mar 13, 2023 — Regular screening of thyroid function！ Thyroid. Function. Page 2. TEST PROCEDURE. ADAPTATION INSTRUMENTS. ITEMS ...Read more
    Missing: cFT3 ‎fFT3

    Free T3 (FT3) Rapid Test Kit


    Vitrosens Biotechnology
    https://vitrosens.com › free-t3-ft3-rapid-test-kit
    Vitrosens Biotechnology
    https://vitrosens.com › free-t3-ft3-rapid-test-kit
    This kit is designed for in vitro quantitative measurement of the concentration of free triiodothyronine (FT3) in human serum, plasma, and whole blood samples.Read more
    thyroid function cFT3 fFT3 rapid test from vitrosens.com
    Missing: cFT3 ‎fFT3

    FT3 test


    Xiamen Biotime Biotechnology Co., Ltd.
    https://www.xiamenbiotime.com › ft3-test_sp
    Xiamen Biotime Biotechnology Co., Ltd.
    https://www.xiamenbiotime.com › ft3-test_sp
    The BiotimeTSH/FT3/FT4Rapid Quantitative Test is intended to quantitatively detect the concentration of thyroid-stimulating hormone (TSH), free triiodothyronine ...Read more
    thyroid function cFT3 fFT3 rapid test from www.xiamenbiotime.com
    Missing: cFT3 ‎fFT3

    Thyroid Function Tests


    American Thyroid Association
    https://www.thyroid.org › thyroid-function-tests
    American Thyroid Association
    https://www.thyroid.org › thyroid-function-tests
    The best way to initially test thyroid function is to measure the TSH level in a blood sample. Changes in TSH can serve as an “early warning system.”Read more
    Missing: cFT3 ‎fFT3

    Wondfo Finecare™ fT3 Rapid Quantitative Test | UNBOXING


    YouTube · Saaskin Corporation
    810+ views · 2 years ago
    YouTube · Saaskin Corporation
    810+ views · 2 years ago
    The Finecare™ fT3 Rapid Quantitative Test is a fluorescence immunoassay used along with Finecare™ FIA Meters for quantitative determination ...
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