
Although a diagnosis from this test is typically not received, it does provide added information for a medical provider to further investigate a thyroid condition. This indicates the range where specific results compare against average results. In general terms, test results for the T3 T4 blood test may be high, normal, or low. Thyroid screening is also a common blood test that is ordered for newborns. Women who are pregnant may have the T3 T4 blood test at the beginning and end of their pregnancy if a thyroid disorder is suspected to help monitor for complications. The thyroid gland may become enlarged, constipation may occur, and there may be an intolerance developed toward cold temperatures. Weight gain, dry and puffy skin, and unusual levels of fatigue are commonly seen with this condition. This test, along with certain physical signs and symptoms, may indicate the presence of hypothyroidism instead. The T3 T4 blood test results may also be out of range with a low positive result. Some people may also notice frequent issues with diarrhea.

There may also be a sensitivity to light, visual disturbances such as “floaters,” puffiness around the eyes, the feeling of weakness, and weight loss present. Anxiety, trouble sleeping, and tremors in the hands are all commonly present. Hyperthyroidism would be associated with a high positive test result and could exhibit itself with numerous symptoms that may seem non-specific. If an individual is suffering from the signs and symptoms of a thyroid disorder, then the T3 T4 blood test will be requested to determine if the hormone results are outside of a normal range. Based on the findings of this blood test, movement toward a diagnosis when there are bothersome symptoms being experienced can be had. Total levels can also be measured, but the results can be somewhat misleading at times because having high protein levels in the blood can create false results.

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The T3 T4 blood test typically measures the amount of free hormones that are available. There are free hormones and there are bound hormones thanks to the proteins that circulate. The thyroid is stimulated to produce the hormones, which then get bound to proteins, and this helps people make it through their day. These hormones are produced by the gland and control the rate at which a person uses energy throughout the day. The T3 T4 blood test is used to help determine how well a person’s thyroid happens to be functioning.
