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RT3U


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RT3U

Alternative Names:

T3RU; Resin T3 uptake; T3 resin uptake; Thyroid hormone-binding ratio
What the risks are:

Risks associated with having blood drawn are slight:

  • excessive bleeding
  • fainting or feeling lightheaded
  • hematoma (blood accumulating under the skin)
  • infection (a slight risk any time the skin is broken)
  • multiple punctures to locate veins

Special considerations:
text continues below

Drugs that can increase RT3U values(that is, lower TBG) include anabolic steroids, heparin, phenytoin, salicylates (high dose), and warfarin.

Drugs that can decrease RT3U values (that is, raise TBG) include antithyroid agents, clofibrate, estrogen, oral contraceptives, and thiazides.
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