T4 Total (Thyroxine)
T4 Total (Thyroxine)
T4 Total (Thyroxine)
T4 Total (Thyroxine)
T4 Total (Thyroxine)
T4 Total (Thyroxine)
On Sale

T4 Total (Thyroxine)

T4 Total (Thyroxine)

Thyroid function test. Decreased in hypothyroidism and in the third stage of (painful) subacute thyroiditis; increased with hyperthyroidism, with subacute thyroiditis in its first stage and with thyrotoxicosis due to Hashimoto disease.3 Used to diagnose T4 toxicosis.
Methodology
    Immunoassay
Clinical Significance
    Thyroxine (T4) is the major secretory hormone of the thyroid. Only 0.03% of T4 is unbound and free for exchange with tissues. Thyroid function may be assessed with thyroid stimulating hormone (TSH) and free T4 measurements.
Limitations
    T4 may be increased with excess intake of iodine or with surreptitious use of thyroxine.3 T4 levels may be abnormal in the presence of systemic nonthyroidal disease.
Reference Range(s)
Adult
    4.8-10.4 µg/dL
Pediatric
    1-8 Years 5.9-11.5 µg/dL
    9-13 Years 4.7-10.4 µg/dL
    14-17 Years 5.0-9.8 µg/dL
Pregnancy
    1st Trimester 6.4-15.2 µg/dL
    2nd Trimester 7.4-15.2 µg/dL
    3rd Trimester 7.7-13.8 µg/dL
    All Trimesters Together 7.0-14.7 µg/dL
Regular price $ 59.00