Print View Attached Docs:
Methodology: Liquid Chromatography (LC) / Tandem Mass Spectrometry (MS/MS)
Edit Date: 11/16/2009
Performed: Monday-Friday
Released: 1-4 days after setup at PeaceHealth Laboratories’ reference lab.
CPT Code: 84140-90
Specimen Collection Details
Collection: One 7.5 mL serum separator tube (SST). Also acceptable: One 4 mL lavender top tube (EDTA) or 4 mL green top tube (heparin).
Handling: Allow to clot, centrifuge and separate serum or plasma from cells within 1 hour, and pour into a plastic vial. Freeze. Critical frozen.
Stability: 6 months frozen. Specimen unstable ambient or refrigerated.
Standard Volume: 0.5 mL serum or plasma.
Minimum Volume: 250 µL serum or plasma.
Transport: Frozen on dry ice.
Rejection Criteria: Ambient or refrigerated specimen.

Reference Interval:
6-35 months 14-147 ng/dL 11-239 ng/dL
3-6 years 15-154 ng/dL 12-128 ng/dL
7-9 years 17-91 ng/dL 12-91 ng/dL
10-12 years 15-203 ng/dL 13-162 ng/dL
13-15 years 23-201 ng/dL 21-155 ng/dL
16-17 years 42-218 ng/dL 33-166 ng/dL
18 years and older 15-132 ng/dL 23-173 ng/dL
Tanner Stage I 15-112 ng/dL 12-111 ng/dL
Tanner Stage II 23-183 ng/dL 17-119 ng/dL
Tanner Stage III 33-217 ng/dL 18-159 ng/dL
Tanner Stage IV-V 42-196 ng/dL 33-160 ng/dL

Family Medicine for America's Health