Testosterone, Bioavailable by LC/MS/MS, Females and Children (Includes Total Testosterone, SHBG and Free Testosterone) TSTLCB
|Method(s)||Liquid Chromatography-Tandem Mass Spectrometry and Immunoassay|
|Synonym||Testosterone Free and Weakly Bound by LC/MS/MS (includes SHBG), Females and Children|
Total Testosterone, SHBG, Free Testosterone and Bioavailable Testosterone
One 5 mL gold (SST) top tube.
1 mL serum 2-8ºC.
Specimen should be collected between 6 and 10 am.
Ambient: 24 hours; Refrigerated: 1 week (3 days in contact with separator gel); Frozen: storage is not recommended
|Schedule||Mon, Thurs; reported Tues, Fri|
|CPTCode||84403 Total Testosterone; 84270 SHBG|
The test is suggested for women and children due to the improved sensitivity of LC/MS/MS analysis of testosterone.
The concentration of free testosterone is derived from a mathematical expression based on the constants for the binding of testosterone to sex hormone binding globulin and albumin.
Results of the SHBG component of this test may be falsely decreased in patients taking over-the-counter biotin supplements.
|Preferred Specimen Collection Device(s)|