Testosterone, Free and Total by LC/MS/MS, Females and Children TSTLCF
|Method(s)||Liquid Chromatography-Tandem Mass Spectrometry and Immunoassay|
Total Testosterone, SHBG, Free Testosterone
One 5 mL gold (SST) top tube.
1 mL serum at 2-8ºC.
Specimen should be collected between 6 and 10 a.m.
Ambient: 24 hours, Refrigerated: 14 days (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)|