1. Measurement of plasma TSH concentration.
TSH
|
Condition
|
High
|
Primary
hypothyroidism
|
Low
|
Secondary
hypothyroidism
|
Very low
|
hyperthyroidism
|
2. Measurement of plasma thyroid hormone concentration.
Generally thyroid hormone decreases in hypothyroid and increases
in hyperthyroid state.
3. Radioactive iodine uptake test.
RAIU test
status
|
Thyroid
status
|
Low uptake
|
Hypothyroid
|
High uptake
|
Hyperthyroid
|
5-15% uptake
at 6th hours
8-30% uptake
at 24th hours
|
Euthyroid
|
4. Measurement of thyroid autoantibody (eg. Anti-TPO
antibody, anti-thyroglobulin antibody, TSH receptor blocking antibody)
5. TSH stimulation test.
6. T3 suppression test.
7. Thyroid scanning
8. Ultra sonogram of thyroid gland.
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