PSA, Free
Abbreviation
FPSA
Preferred Specimen
Serum
Minimum Vol
0.5 mL
Transport Temp
2-8 C (ice packs)
Collection Instructions
Routine venipuncture
Stability
Store at 2-8C up to 24 hours, if not tested within 24 hours, freeze at -20C
Alternative Specimens
None
Reference Ranges
Healthy Males: 0-2.5 ng/mL BPH: results up to 5.0 ng/mL
Stage A Prostate Cancer: up to >10 ng/mL
Stage B Prostate cancer: up to 5.0 ng/mL
Transport Container
Draw tube or plastic pour off tube
Methodology
2-step immunoassay using CMIA (Chemiluminescent Microparticle Immunoassay)
Clinical Significance
Decreased levels-leakage of PSA from the prostate gland. Increased levels- associated with prostatic pathology; including prostatitis, benign prostatic hyperplasia, (BPH), and cancer of the prostate.
Alternative Names
Free PSA