T4, Free

₹400.00

A free T 4 test is used to find out how well your thyroid gland is working. T 4 is 1 of 2 hormones produced by the thyroid, a butterfly-shaped gland in your neck. There are 2 forms of T 4. Some T 4 in your blood is bound to proteins, and some T 4 circulates freely, or unbound from proteins.

SPECIMEN: 2 mL (1 mL min.) serum from 1 SST. Ship refrigerated or frozen.
STABILITY: Room: 2 hrs; Refrigerated: 1 week; Frozen: 4 weeks
REPORT: Daily
INSTRUCTIONS: No special preparation required
USAGE: Free T4 is the metabolically active fraction of thyroxine. FT4 along with TSH gives an accurate picture of thyroid status in patients with abnormal thyroid binding globulin (TBG) like in pregnancy and individuals on treatment with estrogens, androgens, phenytoin or salicylates. This assay is useful for diagnosing both Hypo / Hyperthyroidism.

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