40557:TESTOSTERONE & SEX HORMONE BINDING GLOBULIN, BIOAVAILABLE
Alias Names:
SHBG
Methodology:
Chemiluminescent Immunoassay (CLIA)
Edit Date:
4/18/2010
Components:
Bioavailable Testosterone / Sex Hormone Binding Globulin / Free Testosterone / % Free Testosterone / Total Testosterone
Performed:
Daily
Released:
Same day as tested
CPT Code:
84270 / 84403
Specimen Collection Details
Collection:
One 7.5 mL serum separator tube (SST). Also acceptable: One 5 mL red top tube. Note: Collect 4 mL minimum. Draw specimen between 0600 and 1000 if possible, as testosterone levels vary throughout the day.
Handling:
Allow to clot, centrifuge and separate serum from cells within 2 hours. Refrigerate. Freeze if specimen cannot be assayed within 7 days. Allow no more than one freeze/thaw cycle.
Stability:
7 days refrigerated at 2-8° C, or 2 months frozen at -20° C. Specimen unstable ambient.
Standard Volume:
2 mL serum.
Minimum Volume:
1 mL serum.
Transport:
Refrigerated, or frozen on dry ice.
Comments:
Gross lipemia may yield falsely elevated values.
Rejection Criteria:
Gross hemolysis; gross lipemia, unless cleared by ultracentrifugation; more than one freeze/thaw cycle.