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HelpTest Code PSATF Prostate Specific Antigen, Free (fPSA), Serum (includes tPSA and cPSA)
Specimen Collection Requirements
Prostate Specific Antigen, (fPSA), Free, Serum
| Dept: | Chemistry |
| SPECIMEN COLLECTION REQUIREMENTS | |
| Collection Container: |
SST
|
| Specimen: | Serum |
| Transport Temperature: | Room Temperature |
| Specimen Volume: | Preferred Volume: 1 mL; Minimum Volume: 0.5 mL |
| Also Acceptable: | Red Top Tube |
| TECHNICAL SPECIFICATIONS | |
| Performed: | Monday - Saturday |
| Reported: | Same Day |
| Methodology: | Chemiluminescence |
| CPT: | 84152, 84153 |
| LOINC: | 33667-7 / 12841-3 |
| Stability: | Room Temperature: 7 Days; Refrigerated: 14 Days; Frozen: 30 Days |
| Reference Range: |
% Free PSA: >25% INTERPRETATION: In patients with Total PSA concentrations of 4-10 ng/mL, the probability of finding prostate cancer on needle biopsy is: % Free PSA Probability of Cancer 01-10 56% 10-15 28% 15-20 20% 20-25 16% >25 8% |
| Notes: | Includes: total PSA, complexed PSA and a calculated %free PSA. |
