Thyroid Tests
The thyroid is the bodies thermostat, controlling body temperature, growth rate and energy use. It controls the rate at which the body uses food and affects the operation of almost all bodily processes and organs. An under-functioning of the thyroid gland can result in a condition known as hypothyroidism.
Hypothroidism is thought to be one of the most under-diagnosed conditions in the world today, affecting children, adolescents and adults.
This disorder can produce many diverse symptoms including fatigue, weight gain, depression and constipation. The thyroid gland can also over-secrete thyroid hormones, resulting in
hyperthyroidism with symptoms ranging from weight loss and palpitations to anxiety and diarrhoea.
Signs and symptoms of Hypothyroidism
- Constipation
- Cold intolerance/ low body temperature
- Depression
- Dry, coarse or thick skin
- Excessive fatigue
- Goitre – enlarged, swollen and lumpy thyroid
- Hair loss
- Headaches (including migraines)
- Infertility and impotence
- Low sex drive
- Menstrual/ menopausal problems
- Unexplained weight gain or difficulty losing weight
Signs and symptoms of Hyperthyroidism
- Anxiety
- Breathlessness
- Diarrhoea
- Hair loss
- Hyperactivity
- Insomnia
- Increased perspiration, intolerance to heat
- Menstrual irregularities
- Palpitations
- Protruding eyes
- Vitiligo
- Weight loss
Thyroid tests available
Total thyroid screen
The Total Thyroid Screen measures the levels of all the different thyroid hormones in the blood. This includes Free T3 and T4, Total
T4 and Thyroid Stimulating Hormone (TSH). Thyroid antibodies are also evaluated, providing vital information necessary to detect underlying autoimmune conditions.
Type of test
Blood
Before taking the test
No special requirements
Turnaround time
9 days
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Urine thyroid hormones
This sensitive test measures urine levels of the two thyroid hormones T3 and T4 over 24 hours. As this is a more sensitive test it can be useful in picking up cases that are classed as subclinical hypothyroidism and may be missed.
Type of test
Urine collected over 24 hours
Before taking the test
No special requirements
Turnaround time
14 days
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Reverse T3
The thyroid hormones are converted into their most active form T3 via a number of different reactions. Certain circumstances can impair this conversion resulting in increased levels of Reverse T3 (rT3) Although chemically similar to T3, reverse T3 is completely inactive and lowers the amount of the active thyroid hormones available to do their job.
Reverse T3 can be included in the total thyroid screen on request
Type of test
Blood
Before taking the test
No special requirements
Turnaround time
18 days
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Adrenal thyroid profile
This test is useful to assess the affect of stress levels and the impact they are having on your thyroid hormones as many of the symptoms of excessive stress can be equally due to thyroid dysfunction and stress itself can also have a
For more information about this test Click Here
Specimen requirements
4 saliva samples collected throughout the day
1 first thing in the morning urine sample
Before taking the test
No special requirements
Turnaround time
18 days
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