Product Specification
| Specimen Types | Plasma/Serum |
| Specimen Capacity | 40μL |
| Reaction Time | 15 min |
| Sample Capacity | 80μL |
| Detection Range | 10-320nmol/L |
Clinical Significance
✔ Abnormally high test results Elevated T4 levels may indicate hyperthyroidism. They may also indicate other thyroid problems, such as thyroiditis or toxic multinodular goiter Other reasons for abnormal results may include: high levels of protein in the blood
- too much iodine
- too much thyroid replacement medication
- trophoblastic disease, a group of rare pregnancy related tumors
- germ cell tumors
Too much iodine can raise your T4 levels. Because X-ray dyes can include iodine, a recent X-ray involving dye may also raise your T4 test results
✔ Abnormally low test results Abnormally low levels of T4 may indicate:
- dietary issues, such as fasting, malnutrition, or an iodine deficiency
- medications that affect protein levels
- Hypothyroidism
- Illness
- a pituitary problem
Intent Use
A T4 test is used to evaluate thyroid function and diagnose thyroid disease.
