Prostate Specific Antigen, Free
| Free PSA | |
| Core Laboratory & Transfusion Medicine | |
| Biochemistry | |
| Blood | |
|
See Prostate Specific Antigen, Total for information.
|
Distinguishing prostate cancer from benign prostatic conditions in patients with borderline or moderately increased Prostate Specific Antigen, Total.
Serum, Plasma
0.5 mL
Room Temperature: N/A
Fridge: 5 days @ 2-8°C
Freezer: 3 months @ -20°C
Roche cobas e 602, immunoassay
24 hours a day, 7 days a week
1 hour
3 hours
Free PSA / Total PSA Ratio > 0.27, chance of prostatic cancer is about 10%.
Free PSA / Total PSA Ratio < 0.17, chance of prostatic cancer is about 50%.
In case of discrepancies, always interpret results using reference ranges as stated on laboratory reports and/or electronic patient chart.
Free PSA / Total PSA Ratio < 0.17, chance of prostatic cancer is about 50%.
In case of discrepancies, always interpret results using reference ranges as stated on laboratory reports and/or electronic patient chart.
416-586-4800 extension 4688
Free PSA is reflexed only when Prostate Specific Antigen, Total falls within 4 - 10 ug/L.