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Doctor insights on: Tsh W Reflex To Ft4 What Is This Blood Test

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Blood test shows TSH w/ reflex to FT4 is 13.62 (high) & Free T4 is 1.1 (normal). How would you describe what these results mean?

Blood test shows TSH w/ reflex to FT4 is 13.62 (high) & Free T4 is 1.1 (normal). How would you describe what these results mean?

Thyroid tests: 26F US had TSH 13.6 and Ft4 1.1. Asks: How could you describe what these results mean? ANS: Need 2 know lot more about U which ur Drs already knows so better to ask them. Such as 1. U on BCP? 2. Why was test done? 3. Hx of thyroid problems n past? 4. Taking thyroid meds? 5. Pregnant? As TSH is high, u did not give normal lab range for FT4 but it seems lowest range of normal. Hypothyroid? ...Read more

Dr. Quang Nguyen
893 doctors shared insights

Thyroid Stimulating Hormone (Definition)

A TSH test measures the amount of thyroid stimulating hormone (TSH) in your blood. TSH is produced by the pituitary gland and tells the thyroid gland to make and release the hormones thyroxine ...Read more


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I have a blood test done and my TSH reflex to free T4 is 4.53 .50-4.30 miu/l is that bad?

I have a blood test done and my TSH reflex to free T4 is 4.53 .50-4.30 miu/l is that bad?

I agree to a point!: Tsh slightly elevated. Your body thinks your thyroid is low. The most common cause for hypothyroidism is hashimoto's thyroiditis, which can be indentified by the presence of anti-thyroglobulin antibodies and anti-tpo antibodies. Have these tests. If positive, i would place you on thyroid immediately. I would also have my free-t3 checked as well. Some do not convert T4 to t3! ...Read more

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What to do if I had a blood test done and my TSH reflex to free T4 is 4.53 .50-4.30 miu/l is that bad?

Further workup: A TSH above normal indicates that your brain is telling your thyroid it needs better thyroid function. Have your free T4, free T3 (liothyronine), (liothyronine) Reverse T3 (liothyronine), (liothyronine) thyroglobulin and TPO antibodies, Ferritin, and SHBG levels checked to ensure the thyroid and tissue utilization/conversion to active thyroid is occurring. Furthermore, these levels should be optimized...TSH 3.6, low Rev T3 (liothyronine) ...Read more

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I had a TSH REFLEX TO FREE T4 blood test done, my result is 3.70 (0.40-4.50 mIU/L), is this normal? Thank you.

I had a TSH REFLEX TO FREE T4 blood test done, my result is 3.70 (0.40-4.50 mIU/L), is this normal?   Thank you.

Thyroid function: That appears to be within the normal range, based on the laboratory standard you provided. ...Read more

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What does a blood test TSH reflx ft4 mean?

Thyroid testing: The TSH level will be checked, and if it is out of the reference range, the lab will then run a ft4 without requiring the physician to call you in to have blood drawn again. ...Read more

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What does medium range mean with a thyroid blood test, tsh, ft3 and ft4 is it good or bad?

What does medium range mean with a thyroid blood test, tsh, ft3 and ft4 is it good or bad?

"Normal": I suspect "medium range" means normal. You really should discuss the results of tests with the doctor who ordered them since there may be particulars in your case so that "normal" is not normal. ...Read more

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I ve been taking medicine for hypothyrodism for 2 months! i did a blood test now and my ft4 improved slighty but TSH increased more than before! why?

Thyroid replacement: The TSH increases when the ft4 is too low. But the relationship is not precise. You likely need a higher dose of levothyroxine. See your doctor. ...Read more

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My recent blood test determined my TSH was 5.35 and my ft4 was 13.3. Is my doctor right to consider this normal? I feel awful.

Borderline low: I assume the ft4 is in "pmol/l". That level is normal. The TSH level is mildly high and suggests that your thyroid level may be slightly low overall. The vast majority of people with these readings will have no symptoms related to their thyroid. However, there are some people who are sensitive to even mildly low levels. You should have it repeated along with thyroid antibody (tpo, tg) levels. ...Read more

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I got my blood test back . It says my ft3 is 6.22 ft4 is 1.36 and my TSH is 2.5528 what that mean please help!?

I got my blood test back . It says my ft3 is 6.22 ft4 is 1.36 and my TSH is 2.5528 what that mean please help!?

Normal: That thyroid panel looks normal. If you have symptoms of a thyroid disorder, more thyroid tests can be done, but generally these numbers look good. ...Read more

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Dr. Sanjiv Kaul
252 doctors shared insights

Free T4 (Definition)

T4 is the main hormone produced by the thyroid gland total T4 is amount in blood stream attached to albumin, as well as 'free' in blood stream. Free T4 is just the amount free in serum, ...Read more