Testosterone, Total and Free (Patients => 18 yrs)

General Information

Lab Name

Testosterone, Free and Total (Adults >=18y)

Lab Code

FTTEST

Epic Name

Testosterone Free and Total

Description

Do not order for patients <18 years. Order RTESFT for this group of patients.

Synonyms

Testosterone, Testosterone Free by Calculation

Components

Code	Name
SHBG	Sex Hormone Binding Globulin
TESTF	Free Testosterone, Calculated
TESTMS	Testosterone
TESTMD	Testosterone by LCMS Method

Method: Chemiluminescence, Beckman DxI instrument (SHBG), dye-binding and spectrophotometry (albumin), and LC-MS/MS (testosterone)
Reference Range: See individual components

Specimen Type: Blood
Collection: All Locations:

PLEASE NOTE THAT TWO TUBES ARE REQUIRED FOR THIS TESTING
Also note that a gel-free tube is required for testosterone testing.

Preferred:
For albumin and SHBG: 4 mL blood in LIME GREEN TOP PST tube
plus
For testosterone by LC-MS/MS: 4 mL blood in RED TOP

Also Acceptable:
For albumin and SHBG: 4 mL blood in GOLD TOP SST, RED TOP, ORANGE TOP SST
plus
For testosterone by LC-MS/MS: 4 mL blood in LAVENDER TOP

Pediatric: RED TOP MICROTAINER
Handling Instructions: The Laboratory MUST process testosterone specimens within 24 hours of blood collection.
Quantity: Requested: 1 mL serum/plasma
Minimum: 0.5 mL serum/plasma

Receiving Instructions: Centrifuge and separate serum or plasma for testosterone testing within 24 hours.

Refrigerate serum.

[Albumin used in Calc, but not reported.]

Note:For clinical patients <18 years, see: RTESFT. Remember we do NOT send out Research samples.

Lab Department

Chemistry, University(CHU)

Frequency

Three times each week, results expected in 3-4 days.

Available STAT?

Performing Location(s)

UW-MT	Chemistry, Automated 206-520-4600 Clinical Lab, Room NW220, University of Washington Medical Center, 1959 NE Pacific street, Seattle, WA 98195