Test Name

Thyroid Stimulating
Hormone

Test Code

593

Unit

mIU/mL

Station

Chemistry

Synonym Name/Abbreviation

TSH ; Thyrotropin

CPT Code

84443

Performing Facility

American Medical Labs, Herzliya
Pituah

Analyzer

Roche cobas 6000

Test Method

Electrochemiluminescense Immunoassay
(ECLIA)

AML Preferred Tube

5 mL SST gel

Storage Instructions

Refrigerated

 Stability:

7 days at 2 to 8 ^oC

 1 month at -20
^oC

Min. Volume

1 mL

Comments

TSH is subjected to circadian secretion
rhythm.

Turn-Around-Time

One day

Intended Use

Initial test in thyroid diagnosis.TSH is a very sensitive and
specific parameter for assessing thyroid function and suitable for early
detection or exclusion of disorders in the central regulating circuit
between hypothalamus, pituitary and thyroid.

Limitations

In patients receiving therapy with high biotin doses (ie,
> 5 mg/day), no sample should be taken until at least eight hours after
the last biotin administration.
In rare cases, interference due to extremely high titers of
antibodies to streptavidin and ruthenium can occur. The test contains
additives that minimize these effects. It is recommended that only one
assay method be used consistently to monitor each patient’s course of
therapy.

 Measuring range:
0.005 to 100 IU/mL.

Patient Preparation

No patient preparation
needed

Reasons for Rejection

Improper labelling

Adult Reference Ranges

 0.270 to 4.20
mIU/mL