Thyroid Stimulating Hormone with reflex to Free Thyroxine : ARUP Lab Tests

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Thyroid Stimulating Hormone with reflex to Free Thyroxine : 2006108

Mnemonic: TSHREFLEX

Methodology:	Quantitative Electrochemiluminescent Immunoassay
Performed:	Sun-Sat
Reported:	Within 24 hours
Specimen Required:	Collect: Serum separator tube or plasma separator tube. Also acceptable: Lavender (EDTA) or green (sodium or lithium heparin). Specimen Preparation: Allow specimen to clot completely at room temperature. Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.5 mL) Storage/Transport Temperature: Refrigerated. Unacceptable Conditions: Grossly hemolyzed specimens. Stability (collection to initiation of testing): After separation of cells: Ambient: 24 hours; Refrigerated: 1 week; Frozen: 1 month

Reference Interval:
Effective May 16, 2011

	Males	Females
0-3 days	5.17-14.60 mU/L	5.17-14.60 mU/L
4-30 days	0.43-16.10 mU/L	0.43-16.10 mU/L
1-24 months	0.62-8.05 mU/L	0.62-8.05 mU/L
2-6 years	0.54-4.53 mU/L	0.54-4.53 mU/L
7-11 years	0.66-4.14 mU/L	0.66-4.14 mU/L
12-19 years	0.53-3.59 mU/L	0.53-3.59 mU/L
20 years and older	0.30-4.00 mU/L	0.30-4.00 mU/L
1^st trimester (10-13 weeks gestation)		0.03-3.40 mU/L
2^nd trimester (14-20 weeks gestation)		0.19-4.06 mU/L

Note:

If the Thyroid Stimulating Hormone is outside the reference interval, then Thyroxine, Free (Free T4) testing will be added. Additional charges apply.

CPT Code(s):

84443; if reflexed 84439

Cross References:

Thyrotropin (Thyroid Stimulating Hormone), TSH (Thyroid Stimulating Hormone)

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