Testosterone, Free, Equilibrium Ultrafiltration with Total Testosterone, LC/MS-MS-13510

Test info

  
Testosterone, Free, Equilibrium Ultrafiltration with Total Testosterone, LC/MS-MS
  
13510
  
LAB13510
  
TESTF
  
Testosterone, free and total
  
  • Testosterone, Total, LC/MS
  • Testosterone, Free
  • % Free Testosterone
  
  • Evaluate hirsutism and masculinization in women
  • Evaluate testicular function in clinical states in which the testosterone-binding proteins may be altered (obesity, cirrhosis, thyroid disorders)

Specimen

  
Serum
  
  
2.2 mL
  
1.8 mL
(Note: This volume does not allow for repeat testing.)
  

 

Note: Collect 2 Gold SST tubes

Immediately following collection, mix sample by gently inverting 5 times

  
  1. Allow sample to clot for a minimum of 30 minutes
  2. Spin and transfer aliquot within one (1) hour of sample collection

 

  

Gold serum separator (SST) tube

 

  
  
  1. Allow sample to clot
  2. Spin within one (1) hour of sample collection
  3. Transfer serum to a Transfer vial/tube with cap - 12mL (LabCorp), labelled as serum
  
  

Ambient (preferred)- 7 days

Refrigerated - 7 days

Frozen - 14 days

Freeze/thaw cycles - stable x9

  
  • Hemolyzed or icteric sample
  • Gross lipemia (may yield erroneously high testosterone results)
  • Recently administered isotopes
  • Plasma specimen received
  • Improper labeling
  • Specimen drawn in citrate or ACD tube

Performance

  
LabCorp Burlington (070038): R-LC
  
Daily
  
4 - 6 days
  

Free: Equilibrium ultrafiltration

Total: Liquid chromatography/tandem mass spectrometry (LC/MS-MS)

Clinical and Interpretive info

  

See report

Billing

  
84402
84403
  
Result 2986-8, 2991-8, 15432-8

Tracking

  
04/11/2019
  
05/20/2024
  
10/18/2023