Bioavailable Testosterone(Free and Weakly Bound) BIOTEST

Synonyms

Allscripts (AEHR) Order Name

Bioavailable Testostertone Total

Sunrise Clinical Manager (SCM) Order Name

Bioavailable Testosterone Total

Clinical Info

Free and weakly bound testosterone (FWBT), also referred to as bioavailable testosterone, is thought to reflect an individual's biologically active, circulating testosterone. FWBT includes free testosterone and testosterone that is bound to albumin.

Specimen Type

Blood

Container

Red Top Tube

Collection Instructions

Container/Tube: Gold Top Tube or Red Top Tube
Specimen: 2.3 mL serum
Transport Temperature: Refrigerated
Stability: 14 Days Room Temperature or Refrigerated
Special Instructions
This panel includes Testosterone, Total, which may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin (also termed as vitamin B7 or B8, vitamin H, or coenzyme R). It is recommended to ask all patients who may be indicated for this test about biotin supplementation. Patients should be cautioned to stop biotin consumption at least 72 hours prior to the collection of a sample.

Transport Instructions

Refrigerated

Specimen Stability

14 Days Room Temperature or Refrigerated

Methodology

Ammonium sulfate precipitation; radioassay

Days Performed

Performing Laboratory

LabCorp

CPT

84410
 

PDM

5906075

Result Interpretation

 % free and weakly bound: male: 9.0% to 46.0%, female: 3.0% to 18.0%
 Free and weakly bound: male: 40.0−250.0 ng/dL, female: 0.0−9.5 ng/dL
 
TAT:  4 - 7 Days
This panel includes Testosterone, Total, which may exhibit interference when sample is collected from a person who is consuming a supplement with a high dose of biotin (also termed as vitamin B7 or B8, vitamin H, or coenzyme R). It is recommended to ask all patients who may be indicated for this test about biotin supplementation. Patients should be cautioned to stop biotin consumption at least 72 hours prior to the collection of a sample

Forms