Guest guest Posted June 23, 2009 Report Share Posted June 23, 2009 ----- Forwarded Message ---- jas <humingbrd128 Saturday, June 20, 2009 6:40:46 PM Re: Help with synthroid ??? FOR DEB Free thyroxine (T4) can be measured directly (FT4) or calculated as the free thyroxine index (FTI). The FTI tells how much T4 is present compared to the thyroxine-binding globulin. The FTI can help tell if abnormal amounts of T4 are present because of abnormal amounts of thyroxin-binding globulin. T7 is a convenient parameter that accounts mathematically for the reciprocal effects of T4 and T3 uptake to give a single figure which correlates with free T4. Therefore, increased FTI is seen in hyperthyroidism, and decreased FTI is seen in hypothyroidism. Early cases of hyperthyroidism may be expressed only by decreased thyroid stimulation hormone (TSH) with normal FTI. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You are posting as a guest. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.