Test Code LAB137 T3, Free
Additional Codes
CPT Code: 84481
Performing Laboratory
TidalHealth Peninsula Regional - Core Laboratory: Chemistry
Specimen Requirements
Draw blood in a green-top (lithium heparin) tube is preferred (Serum is not acceptable.) Spin down and separate 1 mL of plasma within 30 minutes. Test within 8 hrs at room temp or within 48 hrs refrigerated. Freeze if not tested within 48 hrs.
Reference Values
0-2 months: 4.7-5.4 pg/mL
2 months - 2 years: 5.7-6.4 pg/mL
2-7 years: 5.3-6.2 pg/mL
7-12 years: 5.0-6.0 pg/mL
12-20 years: 4.8-6.0 pg/mL
> 20 years: 2.0-4.0 pg/mL
Methodology
Electrochemiluminescence immunoassay (ECLIA)