PSA, Fractionated/Free
| Source |
Blood |
| Mnemonic |
FPSA |
| Specimen Requirements |
Test is user pay. Patient must pay $55.00 at time of collection. Recommend not collecting blood for PSA before 2 weeks after DRE.
1 x 5 mL light green (mint) top PST tube. Gold top SST tube also acceptable.
Minimum 1 mL plasma or serum |
| Specimen Handling |
PSC: Centrifuge, pour off, and transport to DSC.
RRL & extra-regional: Centrifuge, pour off, and freeze serum prior to transport to DSC. |
| Additional Information |
Test includes Total PSA, Free PSA, and the Total/Free PSA ratio. |
| Testing Location |
RIA |
|
| Testing Frequency |
Once a week |
| Alternate Name(s) |
Prostate Specific Antigen |
| Reference Interval |
In patients with Total PSA concentrations of 4 - 10 µg/L. The possibility of finding Prostate Cancer on needle biopsy by age in years is:
|
% Free PSA |
50-59 Years |
60-69 Years |
70 Years & Older |
|
< 11 % |
49 % |
58 % |
65 % | |
11-18 % |
27 % |
34 % |
41 % | |
19-25 % |
18 % |
24 % |
30 % | |
> 25 % |
9 % |
12 % |
16 % | |
|
