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Doctor insights on: T3 Uptake

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What is the significance of a low T3 (liothyronine) uptake with normal TSH and ft4 7 weeks post total thyroidectomy and on levothyroxine for 7 wks?

What is the significance of a low T3 (liothyronine) uptake with normal TSH and ft4 7 weeks post total thyroidectomy and on levothyroxine  for 7 wks?

No significance: T3 (liothyronine) uptake is an old test used to indirectly measure t4. Now that we have assay to accurate measure free t4, we don't use this test anymore. If your TSH and free T4 is normal on levothyroxine, then you are doing fine on the current dose. No need to change anything at this point. ...Read more

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Dr. Jesse Krakauer
441 doctors shared insights

Liothyronine (Definition)

Liothyronine is a thyroid ...Read more


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Test done: thyroxine (t4) 12.4 range 4.5-12.4 T3 (liothyronine) uptake 33 range 24-39 TSH 0.01 range 0.450-4.500 . I am on levo 150mg last 60 days. What it means ?

Test done: thyroxine (t4) 12.4 range 4.5-12.4   T3 (liothyronine) uptake 33 range 24-39  TSH 0.01 range 0.450-4.500 . I am on levo 150mg last 60 days. What it means ?

Thyroid tests: All else being equal it means your dose of levothyroxine is probably too high. The TSH level is very low, meaning your body is trying to reduce thyroid hormone levels. Follow-up with your doctor to discuss. ...Read more

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Possible causes of high rbw, high segmented neutrophils, low lymphocytes, low basophils, and high thyroglobulin ab., high T3 (liothyronine) uptake and ferritin?

Possible causes of high rbw, high segmented neutrophils, low lymphocytes, low basophils, and high thyroglobulin ab., high T3 (liothyronine) uptake and ferritin?

Thyroid disorder: Are you on thyroxine? Or you have increased secretion of thyroxine from your thyroid you need to consult an endocrinologist to check your thyroid with isotope scan and ultrasound, increased ferritin reflects inflammation in your body mostly from the thyroid. ...Read more

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Person with normal Total T4, T3 (liothyronine) Uptake, FTI, Ultrasensitive TSH but LOW Total T3 (liothyronine) (63.55 ng/dl) = Synthroid dose needs to increase?

Person with 

normal Total T4, T3 (liothyronine) Uptake, FTI, Ultrasensitive TSH 

but 

LOW Total T3 (liothyronine) (63.55 ng/dl) 

= 

Synthroid dose needs to increase?

It's OK: Hi. Your TSH is "normal", but I'd shoot for a value on therapy generally around the 1.0-1.5 range. The total T4, T3 (liothyronine) resin uptake, and FTI are prehistoric tests no one in the thyroid field has used for years. Your body regulates conversion of T4 to T3 (liothyronine), so your T3 (liothyronine) should be just what the body ordered. Your T3 (liothyronine) is close to the normal range; if you repeat it it's likely to be within normal range. ...Read more

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T4-7.7, T3 Uptake 7.7, TSH 1.41 is this normal??

Yes: All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Having said that, your results are normal. You may consult this site for more information on this topic. http://www.endocrineweb.com/conditions/thyroid/thyroid-function-tests ...Read more

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I had a thyroid panel test and my results are below. Should I be taking medication? TSH - 8.070 T4, Total - 5.4 T3 Uptake Ratio - 26 FreeThyroxine-1.4

I had a thyroid panel test and my results are below. Should I be taking medication?
TSH - 8.070
T4, Total - 5.4
T3 Uptake Ratio - 26
FreeThyroxine-1.4

Repeat test: Ideally, thyroid panel tests should be evaluated based on the reference range for the laboratory where the tests are performed. Most commonly, the reference range for TSH = 0.5 - 5.5. Although your TSH may be slightly high, you may not need treatment. Your total and free T4 are normal. Results such as these usually warrant retesting in 1-3 months. TSH will often return to normal without treatment. ...Read more

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Tsh level is 9.23 HIGH (0.450-4.500) Thyroxine T4 6.4 ( 4.5-12) T3 uptake 27 (24-39%). free thyroxine index 1.7 what does it mean?

Tsh level is 9.23 HIGH (0.450-4.500) Thyroxine T4 6.4 ( 4.5-12) 
T3 uptake 27 (24-39%). 
free thyroxine index 1.7
what does it mean?

Hypothyroidism : Your TSH is a substance made in the brain. When high it indicates the possibility that your thyroid gland is not able to make enough thyroid hormone. In some cases, it takes a repeat test to clarify this was not a false test, but at your age, and depending on how well or not you feel, it might indicate the need to start thyroid replacement treatment. Please review these tests with your doctor. ...Read more

Dr. David Geffner
441 doctors shared insights

T3 (Definition)

T3 is a thyroid ...Read more