Bioavailable Testost. w/o SHBG

Test ID: 

704109

CPT code:

84402, 84403

Synonyms:

Free Testosterone, Direct and Total

Testosterone, Free, Direct With Total Testosterone

Clinical Use:

Evaluate hirsutism and masculinization in women; evaluate testicular function in clinical states where the testosterone binding proteins may be altered (obesity, cirrhosis, thyroid disorders). See individual test descriptions for more information. A pediatric reference interval has not been established for the direct free testosterone test.

Specimen Type:

Serum

Requested Volume: 

0.2 mL

Minimum Volume: 

0.7 mL

Container Type: 

Red-top tube or gel-barrier tube

Collection:

If a red-top tube is used, transfer separated serum to a plastic transport tube.

Storage Instructions:

Room temperature

Stability Requirements:

Rejection Criteria

Gross lipemia (may yield erroneously high free testosterone results); plasma specimen