Under.1 to.5 IU/mL is considered evidence of subclinical hyperthyroidism, less than.1 may be overt hyperthyroidism. "Normal" TSH levels are considered to exclude hypothyroidism or hyperthyroidism. Integrative Interpretation: Levels above 1.5 to 2.0 IU/mL may be indicative of thyroid dysfunction.It is increased in hyperthyroidism and in euthyroid states characterized by increased TBG. Occasionally, hyperthyroidism will not be manifested by elevation of T4 (free or total but only by elevation of T3 (triiodothyronine).
TSH - Thyroid Stimulating Hormone / Serum Thyrotropin. Measures: A pituitary hormone that responds to levels of circulating thyroid hormone. Reference Range: 0.5 - 4.70 IU/mL. (Some laboratories are.3 to 4.5, or other similar ranges.) Conventional Interpretation: Above range, and under 10 IU/mL is "subclinical" hypothyroidism, over 10 IU/mL is overt hypothyroidism.Low levels can be found in Cretinism, hypothyroidism, cirrhosis, malnutrition, and chronic thyroiditis. This is a measurement of the total thyroxine in the serum, including both the physiologically active (free) form, and the inactive form bound to thyroxine-binding globulin (TBG).
Drugs producing increased TBG include clofibrate, lithium, methimazole, phenothiazines, and propylthiouracil. Decreased T3 uptake may occur in hypothyroidism Normal Adult Range: 10 - 26 mcg/dL back to top FREE T4 INDEX (T7) Normal Adult Range: 0.8 1.8 ng/dL back to top TRIIODOTHYRONINE - T3 TOTAL Normal Adult Range: ng/dL back to top THYROID -STIMULATING HORMONE.It's important to know how conventional and integrative physicians interpret your thyroid tests. David Silverman Getty Images News By Mary Shomon. Updated September 22, 2015. If you want to understand key thyroid function tests and lab values, and what they mean, here is a summary of the key tests, what they measure, the reference range.
THYROID LAB VALUESH (Thyroid Stimulating Hormoone) Test is performed to assess the activity of the thyroid gland. It involves measuring the concentration of thyroid-stimulating hormone (TSH) in the blood serum. TSH is secreted by the pituitary gland and stimulates the thyroid gland to produce hormones.Integrative Interpretation: For diagnosis and treatment of hypothyroidism, levels in the top half of the reference range are considered evidence of sufficient thyroid function, and levels in the top 25th percentile of the reference range are considered optimal.
The rest is the result of conversion of thyroxine into triiodothyronine. Reference Range: Free T3: (Triiodothyronine 2.3- 4.2 pg/mL, Total T3: 80 -200 ng/dL Conventional Interpretation: Many conventional physicians do not test Total T3 or Free T3.Test Abbreviation Typical Ranges Serum thyroxine T4 ug/dl. Free thyroxine fraction FT4F Free Thyroxine FT4 ng/dl. Thyroid hormone binding ratio THBR Free Thyroxine index FT4I 4-11. Serum Triiodothyronine T3 80-180 ng/dl Free Triiodothyronine l FT pg/d.
More Information: Read What Your Thyroid Test Results Really Mean Your Next Step? Read Challenges to Getting a Thyroid Diagnosis for guidance on how to get properly diagnosed).COMMON LAB VALUES IN THE THYROID Click here to contact me with questions about your laboratory results - I do not volley e-mails back and forth because it is just too time consuming to keep track of who is responding to what e-mail.
A change in the level of TSH in the blood may signify a malfunctioning of the thyroid gland. THYROXINE (T4) - Increased levels are found in hyperthyroidism, acute thyroiditis, and hepatitis.Free T3 Index FT3I 80-180 Radioactive iodine uptake RAIU 10-30. Serum thyrotropin TSH uU/ml Thyroxine-binding globulin TBG 12-20 ug/dl T4 1.8 ugm. TRH stimulation test Peak TSH 9-30 uIU/ml at 20-30 min Serum thyroglobulin l.
Integrative Interpretation: Some endocrinologists and many integrative physicians feel that TPO antibodies above the reference range not only indicate Hashimoto's Thyroiditis, but that treatment - even when other thyroid levels are normal - may be warranted to resolve symptoms, prevent increase in antibody levels, and/or prevent progression to overt hypothyroidism.Reference Range: Less than 35 IU/mL Conventional Interpretation: Levels above the reference range are indicative of Hashimoto's Thyroiditis, an autoimmune disease. In the conventional view, however, Hashimoto's requires no treatment unless accompanied by overt hypothyroidism, as reflected by a significantly elevated TSH level.
They believe that the reverse T3 should fall in the lower half of the normal range. More Information: Read What Your Thyroid Test Results Really Mean TPO - Thyroid Peroxidase Antibodies / Antithyroid Peroxidase Antibodies Measures: Antibodies that attack the thyroid gland, typically causing destruction of the gland's ability to produce thyroid hormone.Reference Range: Typically 10-24 ng/dL Conventional Interpretation: This test is rarely performed by conventional physicians, who see no value in this measurement. Integrative Interpretation: Integrative physicians and those who some doctors who focus on optimal hormone balance consider elevated RT3 or a RT3/T3 ratio imbalance to be an key sign of an underactive or dysfunctional.
Tg 0-30 ng/m Thyroid microsomal antibody titer TMAb. Varies with method Thyroglobulin antibody titer TgAb. Varies with method Updated on.Along with low/suppressed levels of TSH, Total T4 or Free T4 levels that are above the reference range are considered evidence of hyperthyroidism. Integrative Interpretation: For diagnosis and treatment of hypothyroidism, levels in the top half of the reference range are considered optimal and evidence of proper thyroid function.
When T4 and T3 are too high, TSH secretion decreases, when T4 and T3 are low, TSH secretion increases. Normal Adult Range: miliIU/L back to top. DISCLAIMER This web site's goal is to provide you with information that may be useful in attaining optimal health.Therefore, if thyrotoxicosis is clinically suspect, and T4 and FTI are normal, the test "T3 -RIA" is recommended (this is not the same test as "T3 uptake which has nothing to do with the amount of T3 in the patient's serum).
If you have a health question, please read about. Signs and Symptoms before our conversation. This is a brief summary of lab value interpretation and is not intended in any way to be comprehensive or replace any conversation of your results with your doctor.Nothing in it is meant as a prescription or as medical advice. You should check with your physician before implementing any changes in your exercise or lifestyle habits, especially if you have physical problems or are taking medications of any kind.
Reference Range: Total T4: 4.5 - 12.5 g/dL, Free T4: 0.8 - 1.8 ng/dL. Conventional Interpretation: Many conventional physicians do not test Total T4 or Free T4. However, in some cases, along with elevated TSH, Total T4 or Free T4 levels that are below the reference range are considered evidence of hypothyroidism.Optimal level is from 1.0 to 1.5 IU/mL. More Information: Read What Your Thyroid Test Results Really Mean. T4 - Thyroxine / Free Thyroxine - Free T4. Measures: Total T4 measures the total amount of thyroxine circulating in the bloodstream.