Testosterone, Free and Total
Abbrev Code: | BTEST | ||
Order Code: | LAB6538 | Order Name: | Testosterone, Free |
Synonyms: | Free Testosterone: SHBG; BTEST | ||
Methodology: | Calculation, Vermeulen | ||
CPT Codes: | 84403 x1, 84270 x1 | ||
Test Includes: | Total testosterone (TEST) and sex hormone binding globulin (SHBGT) | ||
Turnaround Time: | Performed Mon-Fri; results are reported within 2-3 days. | ||
Compliance: | Analyte Specific Reagents are used in many laboratory tests necessary for standard medical care and generally do not require U.S. Food and Drug Administration (FDA) approval. This test was developed and its performance characteristics determined by Fairview Laboratory Services. It has not been cleared or approved by the U.S. Food and Drug Administration. This test is used for clinical purposes. It should not be regarded as investigational or for research. |
Collection Instructions
Specimen: | Blood |
Optimal Volume: | 4 mL |
Minimum\Peds Volume: | 1.8 mL |
Container: | Red (no gel) |
Collection Instructions: | Red (gel) containers are also acceptable. Gold gel containers are not acceptable due to a clot activator that interferes with this assay. |
Causes for Rejection: | Hemolyzed specimen. Collection in gold gel container. Sample not separated from cells within 2 hours of collection. |
Processing and Shipping
Specimen Processing: | Within 2 hours, centrifuge and aliquot 1 mL, 0.4 mL minimum for sex hormone binding globulin and 1 mL, 0.4 mL for total testosterone. Two aliquots are required. Store in refrigerator. |
Shipping Instructions: | Ship at refrigerated temperature. |
Test Performed at or Referral Lab | UM Specialty Core/Prot/Endo (Architect A) |
Interpretive
Reference Range: |
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Use: | Evaluation of men with signs of hypogonadism, boys with delayed or precocious puberty, women with hirsutism, virilization, and oligo-amenorrhea, or infants with ambiguous genitalia or virilization; monitoring testosterone replacement or antiandrogen therapy. |
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