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.
|Preferred Specimen Collection Device(s)|