Testosterone, Free & Total - Female or Children
Label Mnemonic: FTSTFC
Epic Lab Code: LAB4141
Downtime Form: A-1a Miscellaneous Request
Commercial Mail-out Laboratory
5231 RCP
356-8593
Specimen(s):
Serum
Specimen Instructions:
Specimen should be collected between 6:00 - 10:00 a.m.
Collection Medium:
Red top tube 5 mL (Clot Activator)
Minimum:
Preferred Minimum: 1 mL serum
Absolute Minimum: 0.8 mL serum
Rejection Criteria:
EDTA plasma
Turn Around Time:
5 days upon receipt at reference laboratory
Reference Range:
Serum Total Testosterone, Determine by LC-MS/MS Age Female Male Premature (26-28 weeks) 5-16 ng/dL 59-125 ng/dL Premature (31-35 weeks) 5-22 ng/dL 37-198 ng/dL Newborn 20-64 ng/dL 75-400 ng/dL 1-5 months < 20 ng/dL 14-363 ng/dL 6-24 months < 9 ng/dL < 37 ng/dL 2-3 years < 20 ng/dL < 15 ng/dL 4-5 years < 30 ng/dL < 19 ng/dL 6-7 years < 7 ng/dL < 13 ng/dL 8-9 years 1-11 ng/dL 2-8 ng/dL 10-11 years 3-32 ng/dL 2-165 ng/dL 12-13 years 6-50 ng/dL 3-619 ng/dL 14-15 years 6-52 ng/dL 31-733 ng/dL 16-17 years 9-58 ng/dL 158-826 ng/dL 18-39 years 9-55 ng/dL 300-1080 ng/dL 40-59 years 9-55 ng/dL 300-890 ng/dL 60 years and older 5-32 ng/dL 300-720 ng/dL Premenopausal (> 18 years) 9-55 ng/dL Postmenopausal 5-32 ng/dL Tanner Stage I 2-17 ng/dL 2-15 ng/dL Tanner Stage II 5-40 ng/dL 3-303 ng/dL Tanner Stage III 10-63 ng/dL 10-851 ng/dL Tanner Stage IV-V 11-62 ng/dL 162-847 ng/dL
Interpretive Data:
The concentration of free testosterone is derived from a mathematical expression based on the constant for the binding of testosterone to sex hormone binding globulin.
Comments:
This test is suggested for women and children due to an improved sensitivity of testosterone by LC-MS/MS.
Methodology:
Quantitative High Performance Liquid Chromatography/Tandem Mass Spectrometry/Electrochemiluminescent Immunoassay The concentration of free testosterone is derived from a mathematical expression based on the constant for the binding of testosterone to sex hormone binding globulin.
CPT Code:
84403 Testosterone, 84270 Sex Hormone Binding Globulin