NEW! REVISED THYROID TESTING
GUIDELINES-
Print these guidelines for your
endocrinologist and practitioner!
IF YOU WOULD LIKE A THYROID EXPERT'S
INTERPRETATION OF YOUR TSH TEST RESULTS CLICK HERE
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AMERICAN ASSOCIATION OF CLINICAL
ENDROCRINOLOGISTS (AACE)-
REVISED TSH GUIDELINES
_____________________________________________________________
Until November 2002, doctor's had relied on a TSH
(thyroid stimulating hormone) level ranging from 0.5 to 5.0 to diagnose
and treat patients with a thyroid disorder who tested outside the
boundaries of that range. Now AACE encourages doctors to consider
treatment for patients who test outside the boundaries of a narrower
margin based on a target TSH level of 0.3 to 3.04, AACE believes the new
range will result in proper diagnosis for millions of Americans who suffer
from a mild thyroid disorder, but have gone untreated until now.
CLINICAL CHEMISTS ISSUE REVISED
THYROID TESTING GUIDELINES
_____________________________________________________________
The National Academy of Clinical Biochemistry, part of the Academy of the
American Association for Clinical Chemistry (AACC), has issued new
Laboratory Medicine Practice Guidelines for thyroid testing.
These practice guidelines are a fairly noticeable departure, and should
have far-reaching effects on thyroid diagnosis and treatment.
Of specific interest are the following findings from the guidelines:
"It is likely that the current upper limit of the population reference
range is skewed by the inclusion of persons with occult thyroid
dysfunction."
"In the future, it is likely that the upper limit of the serum TSH
euthyroid reference range will be reduced to 2.5 mIU/L because >95% of
rigorously screened normal euthyroid volunteers have serum TSH values
between 0.4 and 2.5 mIU/L."
"A serum TSH result between 0.5 and 2.0 mIU/L is generally considered the
therapeutic target for a standard L-T4 replacement dose for primary
hypothyroidism."
"Thyroxine requirements increase during pregnancy. Thyroid status should
be checked with TSH + FT4 during each trimester of pregnancy. The L-T4
dose should be increased (usually by 50 micrograms/day) to maintain a
serum TSH between 0.5 and 2.0 mIU/L and a serum FT4 in the upper third of
the normal reference interval."
The complete text of the guidelines are available online at:
http://www.nacb.org/lmpg/thyroid_LMPG_PDF.stm
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