Gold serum separator (SST) tube
Red/Grey marble top:
Immediatley following collection, mix sample by inverting 5 times
Refrigerated (preferred) - 5 days
Frozen - 6 months
Chemiluminescent Microparticle Immunoassay (CMIA)
Total PSA: < 4.0 ng/mL
When the total PSA is <4.0 or >10.0, the % Free PSA will not be calculated. The % Free PSA will be reported as "Not Specified"
In patients with total PSA concentrations between 4.0 and 10.0 ng/mL, the Prostate Health Index (PHI) may aid in distinguishing prostate cancer from benign prostate conditions.