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fT4 Fast Test Kit (Immunofluorescence Assay)

Getein fT4 Fast Test Kit is used as an aid in the assessment of the thyroid status.
  • Test Item:         fT4
  • Sample Type:   Serum/Plasma/Whole Blood
  • Test Time:        15 min
  • Methodology:   Immunofluorescence Assay
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fT4 Fast Test Kit

(Immunofluorescence Assay)

Intended Use

fT4 Fast Test Kit (Immunofluorescence Assay) is intended for in vitro quantitative determination of free T4 in human serum, plasma and whole blood. This test can be used as an aid in the assessment of the thyroid status.

About fT4

Thyroxine (T4) is the main thyroid hormone secreted into the bloodstream by the thyroid gland. Together with triiodothyronine (T3), it plays a vital role in regulating the body’s metabolic rate, influences the cardiovascular system, growth and bone metabolism, and is important for normal development of gonadal functions and nervous system.

T4 circulates in the bloodstream as an equilibrium mixture of free and serum bound hormone. Free T4 (fT4) is the unbound and biologically active form, which represents only 0.03 % of the total T4. The remaining T4 is inactive and bound to serum proteins such as thyroxine binding globulin (TBG,75%), pre-albumin (15%), and albumin (10%). The determination of free T4 has the advantage of being independent of changes in the concentrations and binding properties of these binding proteins; additional determination of a binding parameter (T uptake, TBG) is therefore unnecessary. Therefore, free T4 is a useful tool in clinical routine diagnostics for the assessment of the thyroid status.


1. For Getein1100/ Getein1180

Package specifications: 25 tests/box, 10 tests/box

1) Getein fT4 test card in a sealed pouch with desiccant

2) Disposable pipet

3) Sample diluent 1

4) User manual: 1 piece/box

5) SD card: 1 piece/box

2. For Getein1600:

Package specifications: 2×24 tests/box, 2×48 tests/box

1) Sealed cartridge with 24/48 Getein fT4 test cards

2) User manual: 1 piece/box

Materials required for Getein1600:

1) Sample diluent: 1 bottle/box

2) Box with pipette tips: 96 tips/box

3) Mixing plate: 1 piece/box

Note: Do not mix or interchange different batches of kits.


Test Item Sample Method Storage Condition
fT4 S/P/WB Immunofluorescence


Detection Range Test Time Cut-off Value Shelf Life
0.30-100.00 pmol/L 15 min 12.00-22.00 pmol/L 24 months

Applicable Device

Getein1100 Immunofluorescence Quantitative Analyzer

Getein1180 Immunofluorescence Quantitative Analyzer

Getein1600 Immunofluorescence Quantitative Analyzer

Clinical Application

1. As an aid in the assessment of the thyroid status.

2. lt should be measured together with TSH if thyroid disorders are suspected and is also suitable for monitoring thyrosuppressive therapy.

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