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Doctor insights on: T3 Free Tracer Dialysis

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What is the definition or description of: free t3 (liothyronine)?

What is the definition or description of: free t3 (liothyronine)?

Thyroid hormone: Thyroid hormone exists in 2 states T4 and T3 (liothyronine) ( they differ in how many iodine molecules are bound to the thyroid hormone chemical structure, with T4 having 4 and T3 (liothyronine) having 3 iodine molecules) ordinarily the thyroid hormones float in the blood either chemically attached to a protein ( protein- bound) or not ( free) so free T3 (liothyronine) is the amount of T3 (liothyronine) hormone in the blood not stuck to protein). ...Read more

Dr. Quresh Khairullah
515 doctors shared insights

Dialysis (Definition)

Simple answer is that it is a medical technology used primarily to provide an artificial replacement for lost kidney function in people with renal failure. Hemodialysis remove wastes and excess water from the blood by circulating blood outside the body through an external filter, called a dialyzer. Blood and dialysate flow through in opposite directions and the ...Read more


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Why does some doctors consider a free t3/rt3 ratio valid and others don't?

Why does some doctors consider a free t3/rt3 ratio valid and others don't?

Different: Doctors often have differences of opinion. Such differences have their root in differences in training and areas of interest. The field of medicine evolves so fast that it is difficult to keep up with all the latest research, even in one's own field, much less someone else's. No doctor can know it all. ...Read more

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My free T3 (liothyronine) is low but all other tests normal. What does this mean?

My free T3 (liothyronine) is low but  all other tests normal. What does this mean?

Probably nothing: Are you taking thyroid replacement? A normal TSH usually means all is ok. See a thyroidologist. ...Read more

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My t3, (liothyronine) free (pg/ml) result was 4.3 and flagged as high. What does this mean?

My t3, (liothyronine) free (pg/ml) result was 4.3 and flagged as high. What does this mean?

It depends...: If you are taking thyroid hormone then this may be a sign you are taking too much, though if the test was done shortly after taking it then it may not be a problem. If not taking thyroid then you might be hyperthyroid and/or have thyroiditis. What is your TSH? Your free T3 (liothyronine) should be rechecked. Consider asking your doc to also check thyroid antibodies. See http://tinyurl.com/koyamo5 ...Read more

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T4 free 1.8 T3 free 4.3 1.8 borderline 4.3 little high What is going on? Can this be transient?

Need labs normals: without an exam, I can only give general information, but lab values are derived from averages of a bunch of people. Being very close to the values of average generally means you are not abnormal. and... can see if the values get worse over time (implies a hormone secreting growth (not cancer) that is growing more abnormal). Or.. its' normal next time. ...Read more

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How can I know if my imune system is what causing me a low levels of free T3 (liothyronine) ? And if it has any thing to do with me having misscarriages ?

Complicated: Check thyroid antibodies to see if you have hashimoto's as a cause of low free t3 (liothyronine). There are other causes, including stress. If you have an autoimmune issue (like hashimoto's) it can effect your fertility so it is important to have this all checked out. There are other tests that should be run to get a sense of what might be contributing to the miscarriages- like hormones, clotting factors. Etc. ...Read more

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What will the treatment be for a free T3 (liothyronine) of 1.76?

What will the treatment be for a free T3 (liothyronine) of 1.76?

Maybe none: The units and normal ranges for free t-3 vary widely. In addition, the free t-3 is never used by itself to diagnose a thyroid disorder. It is only even minimally helpful when it is in combination with more useful and conventional thyroid tests like the free-4 and tsh. Free t-3 measures free t-3 in the blood, but what's really important is the t-3 level in the cells, which the test can't measure. ...Read more

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If my free T3 (liothyronine) and T4 is in the normal range, but my ths is 11.7 what does that mean?

If my free T3 (liothyronine) and T4 is in the normal range, but my ths is 11.7 what does that mean?

Likely hypothyroid: Ie: your T4 level is low for you, compared to other folks see endocrinologist- if repeat TSH is same, need thyroid hormone therapy, T4 will rise , modestly, TSH will fall into normal range. ...Read more

Dr. Jesse Krakauer
454 doctors shared insights

Liothyronine (Definition)

Liothyronine is a thyroid ...Read more


Dr. David Geffner
453 doctors shared insights

T3 (Definition)

T3 is a thyroid ...Read more