Free and Total Testosterone by Mass Spectrometry/Equilibrium Dialysis

Synonyms

  • LAB11138
  • TESTMS
  • TESTOSTERONE, FREE MS/EQ DIALYSIS

Cerner Name

Testosterone, Free MS/EQ Dialysis

Clinical Info

This method is recommended for testing women, children, and hypogonadal men. Free testosterone is best measured by equilibrium dialysis, while total testosterone is measured by HPLC with tandem mass spectrometry

Specimen Sources

Blood, Arterial Blood, Capillary Blood, Central Line Blood, Venous

Specimen Types

Blood

Specimen Volume

2 mL of Serum

Container

2 mL of Serum (Gold Top Tube or Red-top tube Specimen)

Collection Instructions

Serum must be separated from cells within 45 minutes of venipuncture.

Transport Instructions

Refrigerated

Specimen Stability

6 Days Room Temperature
7 Days Refrigerated
2.6 Years Frozen

Methodology

Testosterone: High-pressure liquid chromatography/tandem mass spectrometry (HPLC/MS-MS)
Free testosterone: Equilibrium dialysis

Days Performed

TAT: 6 - 10 Days

Performing Laboratories

LabCorp- Endocrine Sciences

CPT

84402,84403

PDM

225709

Results
Component Name Base Name Common Name External Name
TESTOSTERONE - TOTAL TESTOSTERONE TESTOSTERONE Testosterone Total
% FREE TESTOSTERONE (DIALYSIS) FREETESTPCT PCT FREE TESTOSTERONE DIALYSIS % Free Testosterone (Dialysis)
FREE TESTOSTERONE, SERUM TESTOST TESTOSTERONE FREE Free Testosterone

Result Interpretation

See Report

Forms
Endocrine LAB11138 build edit