What Are Normal Blood Test Results For Thyroid

Thyroid function tests are one of the most common lab tests most of the time they will clearly show if your thyroid is underactive. Rarely patients with thyroid nodules may complain of pain in the neck jaw or ear.

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T4 TESTS T4 is the main form of thyroid hormone circulating in the blood.

What are normal blood test results for thyroid. The normal range of TSH levels in adults is between 04 to 40 mIUL milli-international units per liter. Pregnancy a history of thyroid cancer history of pituitary gland disease and older age are some situations when TSH is optimally maintained in different range as guided by an endocrinologist. A TSH reading in this range indicates the thyroid gland is functioning normally.

The T3 and T4. Reference ranges remain controversial but for most people the normal range falls between 04 and 40 mUl. TSH normal values are 05 to 50 mIUL.

Noting that it had enlarged in the face of normal thyroid function tests the endocrinologist ordered a fine-needle aspiration biopsy which showed a cellular follicular lesion. Therefore it is generally advisable only to check thyroid function in those patients in whom primary disturbance of one or other part of the HPT axis is suspected. In the authors hospital the normal or reference range for free thyroxine fT4 in the blood is 1025 picomoles per litre pmoll although this will vary slightly from laboratory to laboratory.

Intercurrent illness can affect thyroid function in several different ways Fig 1. However doctors do not all agree on the precise TSH range of a normal-functioning thyroid gland. 040 - 450 mIUmL milli-international units per liter of blood.

However most thyroid nodules including those that cancerous are actually non-functioning meaning tests like TSH are normal. If TSH is abnormal measurement of thyroid hormones directly including thyroxine T4 and triiodothyronine T3 may be done to further evaluate the problem. In most healthy individuals a normal TSH value means that the thyroid is functioning properly.

Some research suggests that this range should actually be more like 045 to 25 mIUL. To manage decreased TBG insulin sensitivity and blood sugar tests like fasting blood glucose fasting insulin levels glucose tolerance test and hbA1C are also helpful. A 41-year-old woman had a 1-to 2-cm asymptomatic thyroid mass which had been monitored by an endocrinologist for several years with serial sonography.

These are the main hormones made by the thyroid gland. Thyroid nodules may produce excess amounts of thyroid hormone causing hyperthyroidism see Hyperthyroidism brochure. FT4 normal values are 07 to 19ngdL.

However sometimes the test results can be confusing. Normal test range for an adult. In general the normal reference range for TSH levels is 05 to 50 milli-international units per liter mIUL of blood.

Levels of these hormones may also be measured to get a sense of thyroid gland function. Patients with decreased TBG levels will have normal TSH normal T4 high T3 levels low T3 uptake and low thyroid-binding globulin show up on their blood test results. Normal TSH ranges can vary widely depending on a persons age sex and body weight.

Occasionally a low TSH may result from an abnormality in the pituitary gland which prevents it from making enough TSH to stimulate the thyroid secondary hypothyroidism. While you may be told that TSH levels of 1 to 2 mUL are fine if you have mild hypothyroidism it is possible to still have symptoms especially if your levels tend to fluctuate. To this end some endocrinologists have lowered the TSH threshold from the standard normal range of 05 to 5 mUL to a revised normal range of 03 to 30 mUL.

Commonly TSH is low normal or partially suppressed with low or normal free TH. TSH levels are measured in ranges.

Factors That Affect Your Thyroid Test Results