Testosterone, Total

Alternative Names/Synonyms
Laboratory	Core Laboratory & Transfusion Medicine
Sub-section	Biochemistry
Specimen Type	Blood
Test Code	TES3, TESP3

Clinical Significance (If applicable)

Evaluating adrenal tumors, adrenal hyperplasia and infants with ambiguous genitalia.

Assisting in the diagnosis of androgenic syndrome, polycystic ovarian syndrome and evaluation of ovarian tumor or ovarian insufficiency in females.

Assessing hypogonadi

Specimen Requirements (Sample Type)

Serum, Plasma

Specimen Requirements (Volume (mL))

0.5 mL

Specimen Requirements (Tube Type)

Serum (Gold SST)
Plasma (Light Green PST)
Collection Containers – Tube Types

Draw (mL)

4.5 mL

Collection Requirements

Collection Instructions

Sample Stability

Room Temperature: 8 days

Fridge: 14 days @ 2-8°C

Freezer: 24 months @ -20°C

Cause for Rejection

Specimen Acceptability and Transport Guidance

Instrument, Methodology

Roche cobas e 602, immunoassay

Test Availability

24 hours a day, 7 days a week

STAT Turnaround Time

1 hour

Routine Turnaround Time

3 hours

Reference Ranges

Females: 0.2 - 2.9 nmol/L
Males: 10.0 - 28.0 nmol/L

In case of discrepancies, always interpret results using reference ranges as stated on laboratory reports and/or electronic patient chart.

Laboratory Contact Information

416-586-4800 extension 4688

Patient Preparation

Do not use order test on patients undergoing Nandrolone treatment as this will interfere with the assay.

Ordering Practices

Used in the calculation of the Free Androgen Index.