Testosterone, Calculated Free

Specimen Tube Type Transport

Red top serum only

Container Whole Blood Required

3 mL filled tube or 6 mL tube

Critical Value

None

Summary Test Name

Testosterone, Calulated Free

Special Handling Instructions

No serum separator or gel tubes

Specimen Stability

Ambient 24 hours, refrigerated 1 week, frozen 6 months

Minimum Volume

0.8 mL

Specimen Preparation In House

Separate serum from cells as soon as possible or within 2 hours of collection

Stat Availability

No

Test Turnaround Time Routines And Stats

2-5 days, stat not available
Draw date: Monday, Tuesday, Wednesday-Analysis date Thursday- result reported Friday
Draw date: Thursday, Friday, Saturday, Sunday-Analysis date Monday-Result reported Tuesday
 

Patient Preparation

Collect between 06:00 - 10:00AM

Preferred Volume

1.0 mL

Reference Value

AGE	FEMALE ng/dl	MALE ng/dl
1-6 yo	less than 0.6	less than 0.6
7-9 yo	0.6-1.8	0.1-0.9
10-11 yo	0.1-3.5	0.1-6.3
12-13 yo	0.9-6.8	0.5-98
14-15 yo	1.2-7.5	3.0-138
16-17 yo	1.2-9.9	38-173
18-30 yo	0.8-7.4	18 and older 47-244
31-40 yo	1.3-9.2
41-51 yo	1.1-5.8
postmenopausal	0.6-3.8
Tanner Stages
Stage I	Less than 2.2	Less than or equal to 3.7
Stage II	0.4-4.5	0.3-21
Stage III	1.3-7.5	1.0-98
Stage IV	1.1-15.5	35-169
Stage V	0.8-9.2	41-239

Test Results

ng/dL