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HelpTest Code FTCAL Testosterone (Tot, F+SHBG), LAB5171
Performing Laboratory
St. Luke's Hospital Laboratory
Specimen Requirements
Preferred Container/Tube: Green top (Lithium Heparin)
Acceptable: Gold top-SST, or Red Top
Specimen Volume: 0.5 mL
Stability and Storage:
- Room temperature: 5 days
- Refrigeration (2°- 8°C): 7 days
- Frozen (≤ -20°C): 12 months. Freeze samples only once and mix thoroughly after thawing.
Transport: Refrigerated
Reference Values
|
Calculated Free Testosterone |
Male ng/dL |
Female ng/dL |
|
1-15 Days |
0.20-3.10 |
<0.13-0.25 |
|
16 Days-1 Year |
Values decrease gradually from newborn (0.20-3.10) to prepubertal levels |
Values decrease gradually from newborn (<.13-0.25) to prepubertal levels |
|
1-4 Years |
<0.13 |
<0.13 |
|
5 |
<0.13 |
<0.13 |
|
6 |
<0.13 |
<0.14 |
|
7 |
<0.13 |
<0.13-0.23 |
|
8 |
<0.13 |
<0.13-0.34 |
|
9 |
<0.13-0.45 |
<0.13-0.46 |
|
10 |
<0.13-1.26 |
<0.13-0.59 |
|
11 |
<0.13-5.52 |
<0.13-0.72 |
|
12 |
<0.13-9.28 |
<0.13-0.84 |
|
13 |
<0.13-12.6 |
<0.13-0.96 |
|
14 |
0.48-15.3 |
<0.13-1.06 |
|
15 |
1.62-17.7 |
<0.13-1.09 |
|
16 |
2.93-19.5 |
<0.13-1.09 |
|
17 |
4.28-20.9 |
<0.13-1.09 |
|
18-<25 Years |
5.25-20.7 |
<0.13-1.08 |
|
25-<30 Years |
5.05-19.8 |
<0.13-1.06 |
|
30-<35 Years |
4.85-19.0 |
<0.13-1.03 |
|
35-<40 Years |
4.65-18.1 |
<0.13-1.00 |
|
40-<45 Years |
4.46-17.1 |
<0.13-0.98 |
|
45-<50 Years |
4.26-16.4 |
<0.13-0.95 |
|
50-<55 Years |
4.06-15.6 |
<0.13-0.92 |
|
55-<60 Years |
3.87-14.7 |
<0.13-0.90 |
|
60-<65 Years |
3.67-13.9 |
<0.13-0.87 |
|
65-<70 Years |
3.47-13.0 |
<0.13-0.84 |
|
70-<75 Years |
3.28-12.2 |
<0.13-0.82 |
|
75-<80 Years |
3.08-11.3 |
<0.13-0.79 |
|
80-<85 Years |
2.88-10.5 |
<0.13-0.76 |
|
85-<90 Years |
2.69-9.61 |
<0.13-0.73 |
|
90-<95 Years |
2.49-8.76 |
<0.13-0.71 |
|
95+ Years |
2.29-7.91 |
<0.13-0.68 |
Day(s) Test Set Up
Monday-Sunday
Useful For
- Assessment of androgen status in cases with suspected or known sex hormone-binding globulin-binding abnormalities
- Assessment of functional circulating testosterone in early pubertal boys and older men
- Assessment of functional circulating testosterone in women with symptoms or signs of hyperandrogenism but normal total testosterone levels
- Monitoring testosterone therapy or antiandrogen therapy
Methodology
Electrochemiluminescence Assay
Vermeulen equation to calculate free testosterone
Test Classification and CPT Coding
Testosterone, Free 84402
Testosterone, Total 84403
Sex Human Binding Globulin 84270
Albumin 82040
Report Available
Stat within 1 hr of receipt
Routine within 2 hrs of receipt