| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Testosterone, Free, Bioavailable and Total, Males (Adult), Immunoassay : 30741
Test CodeTESSBC or 30741
CPT Codes
84403, 84270, 82040
Includes
Panel includes: Testosterone, Total, Males (Adult), Immunoassay; Albumin; Sex Hormone Binding Globulin (SHBG); Testosterone, Free and Bioavailable (calculated)
Instructions
Due to changes in testosterone levels throughout the day, two morning (8:00-10:00 a.m.) specimens obtained on different days are recommended by The Endocrine Society for screening.
Dietary supplements containing biotin may interfere in assays and may skew results to be either falsely high or falsely low. For patients receiving the recommended daily doses of biotin, draw samples at least 8 hours following the last biotin supplementation. For patients on mega-doses of biotin supplements, draw samples at least 72 hours following the last biotin supplementation.
Note: This assay should be performed on adult (≥18 years) males.
Dietary supplements containing biotin may interfere in assays and may skew results to be either falsely high or falsely low. For patients receiving the recommended daily doses of biotin, draw samples at least 8 hours following the last biotin supplementation. For patients on mega-doses of biotin supplements, draw samples at least 72 hours following the last biotin supplementation.
Note: This assay should be performed on adult (≥18 years) males.
Transport Container
Preferred Specimen:
2 mL serum collected in a red-top tube (no gel)
Alternative Specimen:
Serum Separator Tube (SST)
Minimum Volume
1.5 mL
2 mL serum collected in a red-top tube (no gel)
Alternative Specimen:
Serum Separator Tube (SST)
Minimum Volume
1.5 mL
Transport Temperature
Room temperature.
Specimen Stability
Room temperature: 5 days; Refrigerated: 7 days; Frozen: 21 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Grossly icteric
Methodology
Immunoassay
Setup Schedule
Sunday - Saturday
Report Available
1 day
Reference Range
Testosterone, Total, Males (Adult), Immunoassay
Male 250-827 ng/dL
Female Not applicable
All test requests for Testosterone on female and pediatric (<18 years) patients must use test code 15983 - Testosterone, Total, MS.
Albumin 3.6-5.1 g/dL
Sex Hormone Binding Globulin
Age Male (nmol/L) Female (nmol/L)
<3 Years Not established Not established
3-9 Years 32-158 32-158
10-13 Years 20-166 24-120
14-17 Years 20-87 12-150
18-55 Years 10-50 17-124
>55 Years 22-77 14-73
Free Testosterone
Age Male (pg/mL) Female
18-69 Years 46.0-224.0 Not applicable
>69 Years 6.0-73.0 Not applicable
Bioavailable Testosterone
Age Male (ng/dL) Female
18-69 Years 110.0-575.0 Not applicable
>69 Years 15.0-150.0 Not applicable
Male 250-827 ng/dL
Female Not applicable
All test requests for Testosterone on female and pediatric (<18 years) patients must use test code 15983 - Testosterone, Total, MS.
Albumin 3.6-5.1 g/dL
Sex Hormone Binding Globulin
Age Male (nmol/L) Female (nmol/L)
<3 Years Not established Not established
3-9 Years 32-158 32-158
10-13 Years 20-166 24-120
14-17 Years 20-87 12-150
18-55 Years 10-50 17-124
>55 Years 22-77 14-73
Free Testosterone
Age Male (pg/mL) Female
18-69 Years 46.0-224.0 Not applicable
>69 Years 6.0-73.0 Not applicable
Bioavailable Testosterone
Age Male (ng/dL) Female
18-69 Years 110.0-575.0 Not applicable
>69 Years 15.0-150.0 Not applicable
Clinical Significance
Testosterone circulates almost entirely bound to transport proteins: Normally less than 1-2% is free. The principal transport protein for testosterone is known as sex hormone binding globulin (SHBG) or testosterone-estradiol binding globulin (TeBG). Testosterone measurements are used to assess erectile dysfunction, infertility, gynecomastia, and osteoporosis and to assess hormone replacement therapy.
Performing Laboratory
med fusion
