Testosterone, Free (Dialysis) and Total, MS | Corewell Health Laboratories

Synonyms

QUEST: 36170 | total test, free test, free and total test, testosterone, mass spec

Ordering Instructions

Includes: Testosterone, Total, MS and Testosterone, Free (Dialysis)

This assay is intended for

Assessing testicular function in prepubescent hypogonadal males
Management of hirsutism and virilization in females
Please note: This test is not appropriate for general testosterone screening.

Specimen Collection

Collection Instructions

Specimen Collection: Blood

Container(s): Gold Top (Serum Separator-SST Gel) or Red Top (no gel)

Minimum Volume to Collect: 3.0 mL

Collection Instructions:

After collection, gently invert tube 8-10 times.
Specimen should be processed within 2 hours -- See Processing Instructions.

Processing Instructions

Laboratory, Outpatient or Off-site collection

Processing Instructions:

Specify age and sex on test request form.
Red-top tube (no gel): Allow blood to clot at room temperature. Centrifuge to separate the serum from the cells and immediately pour serum into a plastic transport tube.
Serum separator tube: Allow blood to clot at room temperature, centrifuge, and remove serum from the gel immediately (not to exceed 48 hours) by pouring serum into a plastic transport tube.

Processed Specimen: 1.8 mL Serum (Minimum volume: 0.9 mL)

Centrifuge/Spin: Yes

Aliquot: Yes

Transport Instructions

Transport Container: Transport tube

Transport Temperature: Room temperature

Rejection Criteria

Gross hemolysis • Grossly lipemic

Specimen Stability and Storage

Room temperature: 7 days
Refrigerated: 21 days
Frozen: 2 years

Performed

Quest Diagnostics Laboratory

Reference Range

See Laboratory Report

Clinical Information

Testosterone, Free (Dialysis) and Total, MS - Helpful in assessing testicular function in prepubescent hypogonadal males and in managing hirsutism, virilization in females.