Thyroid Results - and confusion

[DoressW]

TSH 3rd Generation w/Reflex to FT4
my results = 0.03     (range 0.40 - 4.50) mIU/L
T4 - FREE
my results = 1.8       (range 0.8 - 1.8)  ng/dL

How can I be so low on the TSH 3 and so high on the T4 ?  

The doctors office sent my results since I never heard anything back (I actually went into the office and asked for the results - never thinking they would mail them to me). So now I have quesitons because there is no doctor here to answer them.  Thanks in advance

[898_1]

Any recent respiratory infection?
Injection of Iodine (contrast medium)?

[goolarra]

That's the way FT4 and TSH behave.  When one is high, the other should be low and vice versa.

TSH is a messenger hormone from your pituitary to your thyroid to tell it to make more T4.  If your pituitary thinks your T4 level is too high, it stops sending out TSH.  So, high FT4 levels lower TSH.

Your FT4 is at the very top of the range.  This indicates possible hypERthyroidism.  Do you have symptoms?  Are you currently taking any thyroid meds?  Did they test FT3 as well?