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Test Code FTES Testosterone, Free

Important Note

This test should not be performed on patients who received radioactive material in the last 7 days. 

Specimen Requirements

Specimen Type: Serum

Container/Tube: Gold Top (SSTII) / Red Top

Volume: 5.0mL / 6.0mL blood
Minimum volume: 0.5mL serum

Collection Instructions: Allow specimen to clot for 30 minutes and centrifuge within 2 hours

Sample Stability

 ** Preferred temperatures for storage prior to and during shipping to NUH **

 

Specimen Type: Serum
Ambient: 8 hours
Refrigerate: 1 day
Frozen: 2 months

 

Reference Interval

Age Group Male (pmol/L) Females (pmol/L)
<15 years ≤6.25 ≤9.38
15 - 39 years 18.75 - 138.89 ≤15.97
40 - 59 years 12.50 - 89.24 ≤13.89
≥60 years 5.21 - 100.00 ≤17.36

 

Days and Times Performed

Alternate Fridays, TAT 2-15 days

Methodology

Radioimmunoassay

Service Code

0031672

Update

Last updated 05/09/2024

Updated on Sample Stability Ambient

Unacceptable Condition

Haemolysis NA
Icterus NA
Lipaemia NA
Others NA

 

Testing Laboratory

National University Hospital
Clinical Chemistry, 67724399

Useful For

For In Vitro determination of Free Testosterone levels in hirsutism and hypogonadism