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Test Code LAB129 Thyroid-Stimulating Hormone (TSH), Plasma or Serum

Reporting Title

TSH 3rd Generation

Methodology

Roche Diagnostics, Electrochemiluminescence Immunoassay-RMH, GMC, DH, DMH, GMH, WECC, PMC, GCMH, BH, OBH, MGH, MH, HMH, SH

Used as a primary test for differential diagnosis of thyroid disease and as an aid in monitoring adequacy of thyroid hormone replacement therapy.

 

 

Performing Laboratory

OhioHealth Laboratory Services-RMH,GMC,DH,DMH,MGH, GMH, HMH, OBH, MH, SH, WECC, GCMH, BH and PMC Core Laboratories

Specimen Requirements

Collection Instructions:

1. Serum and Plasma gel tubes should be centrifuged within 2 hours of collection.

2. Red-top tubes should be centrifuged and aliquoted within 2 hours of collection.

 

Submit only 1 of the following specimens:

 

Preferred:

Serum

Draw blood in a gold-top serum gel tube(s). Spin down and send 0.5 mL of serum refrigerated.
Note:

1. A speckled-top serum gel tube (s) or a plain, red-top tube(s) is also acceptable.

2. Heterophile antibodies may interfere with this assay.

3. Indicate serum on request form.

4. Label specimen appropriately (serum).

 

Alternate: 

Plasma

Draw blood in a mint green-top (heparin) gel tube(s). Spin down and send 0.5 mL of heparinized plasma refrigerated.

Note:  1. Heterophile antibodies may interfere with this assay.

2. Indicate plasma on request form.

3. Label specimen appropriately (plasma).

Specimen Stability Information

Specimen Type Temperature Time
Serum or plasma Refrigerated 14 days
  Ambient  8 days
  Frozen  24 months

 

Specimen Transport Temperature

Refrigerate/Frozen/Ambient -All OK

Reference Values

0-5 d:       0.7-15.2 microIU/mL
6d-2 mo:  0.7-11.0
3-11 mo:  0.7-8.4
1-5 y:       0.7-6.0
6-10 y:     0.6-4.8
11-18 y:   0.5-4.3

≥ 19 y:   

0.27-4.2  microIU/mL (euthyroid)

<0.1 microIU/mL (hyperthyroid)

>7.1 microIU/mL (hypothyroid)

Day(s) Test Set Up

Monday through Sunday; Continuously

Test Classification and CPT Coding

84443