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A member asked:
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?
4 doctors weighed in across 2 answers
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.
Answered 1/15/2015
5.6k views
May be insignificant: T3 (liothyronine) uptake looks at the availability of proteins in the blood to carry t3 (liothyronine). A low value may be clinically insignificant if your TSH and free T4 are normal. If you think you're having symptoms of hyperthyroidism, then this would be a great question for your endocrinologist, but i wouldn't be surprised if it was something that's just followed without any adjustment to your levothyroxine.
Answered 1/15/2015
5.6k views
Related Questions
A member asked:
2.5 weeout thyroidectomand on 100mg of levothyroxine TSH 0.84 ft4 1.5 and T3 (liothyronine) 114. R these normal results for being on Synthroid for a week and a half?
A doctor has provided 1 answer
A member asked:
I'm on Levothyroxine and Cytomel (liothyronine) for T3 and T4 and my blood work came back TSH w/Reflex to FT4 is 0.01 L and T4, FREE is 0.6 L. What does this mean?
3 doctors weighed in across 2 answers
A member asked:
My TSH is point 4 (.4) free T3 (liothyronine) is 2.3 free T4 is 1.0 reverse T3 (liothyronine) is 286. I take 200mcg levothyroxine. No enerdgy, hair falling out, weight gain?
2 doctors weighed in across 2 answers
A member asked:
If my TSH and T4 are high and free thyroxine is normal...but T3 (liothyronine) uptake is low, should I take synthroid my dr prescribed?
A doctor has provided 1 answer
A member asked:
Low T3 (liothyronine) uptake (21%), Normal TSH (3.190), normal T4 (9.4), normal free thyroxine index (2.0). Also low BUN/creatine ratio (7). Is this normal?
4 doctors weighed in across 2 answers
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