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Test Code LAB124 Testosterone

Clinical Information

A strong interaction with Nandrolone decanoate, 11β-hydroxytestosterone, and 11-ketotestosterone was found. Do not use samples from patients receiving these compounds. With the advent of new steroid-based medications (analogues) with similar chemical structures to testosterone, there is the possibility of cross-reactivity and falsely elevated results. For diagnostic purposes, the results should always be assessed in conjunction with the patient's medical history, clinical examination, and other findings. If the testosterone results are inconsistent with clinical evidence, additional testing is suggested to confirm the result. For assays employing antibodies, the possibility exists for interference by human anti-animal antibodies (i.e., heterophile antibodies) in the patient sample. Patients who have been regularly exposed to animals or have received immunotherapy or diagnostic procedures utilizing immunoglobulins or immunoglobulin fragments may produce antibodies, (eg, HAMA), that interfere with immunoassays. This may falsely elevate or falsely decrease the results.

Synonym

  • TESTOS

Specimen Required

Preferred Container/Tube: Gold SST Top
Acceptable Container/Tube: Mint Green Top
Specimen Volume: 3 mL
Specimen Minimum Volume: 1 mL

Specimen Collection Information

Serum should be physically separated from cells as soon as possible with a maximum time limit of 2 hours from the time of collection.
Mint top whole blood can be stored at room temperature for a maximum of 8 hours prior to centrifugation.

Specimen Stability Information

Ambient: 8 hours
Refrigerated: 5 days

Rejected Due To

  • Gross hemolysis

Reference Values

FEMALE MALE
0-6 months: 20-80 ng/dL
6 months to 9 years: ≤20 ng/dL
10-11 years: ≤44 ng/dL
12-16 years: ≤75 ng/dL
17-18 years: 20-75 ng/dL
19+ years: 8-60 ng/dL		 0-6 months: 75-400 ng/dL
6 months to 9 years: ≤20 ng/dL
10-11 years: ≤130 ng/dL
12-13 years: ≤800 ng/dL
14-15 years: ≤1,200 ng/dL
15-16 years: 100-1,200 ng/dL
17-18 years: 300-1,200 ng/dL
19+ years: 240-950 ng/dL

 

Method Description

Competitive immunoassay using direct chemiluminescent technology.

Performing Lab

Clinical Lab UH

Day(s) Performed

Monday through Sunday

Report Available

Same day/1 day

Reporting Name

Testosterone

CPT Code Information

84403

LOINC Code Information

2986-8