The clinical utility of free thyroxine in oral levothyroxine absorption testing.

@article{Sun2014TheCU,
  title={The clinical utility of free thyroxine in oral levothyroxine absorption testing.},
  author={Grace E. Ching Sun and Kevin M Pantalone and Charles Faiman and Manjula K. Gupta and Leann Olansky and Betul A. Hatipoglu},
  journal={Endocrine practice : official journal of the American College of Endocrinology and the American Association of Clinical Endocrinologists},
  year={2014},
  volume={20 9},
  pages={925-9}
}
OBJECTIVE Original absorption studies for levothyroxine (LT4) were validated using total thyroxine (TT4) measurements. Free thyroxine (FT4) has largely supplanted TT4 in clinical practice. The objective of our study was to assess the clinical utility of FT4 in oral LT4 absorption testing. METHODS In this retrospective electronic health record analysis, we recorded data of patients who underwent LT4 oral absorption testing between November 2010 and January 2012 because of persistent… CONTINUE READING

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