PROSTATE SPECIFIC AG, TOTAL AND FREE, ULTRASENITIVE
Assay is Performed Using Roche Diagnostic's Third Generation PSA reagents.
Specimen Collection Requirements
Serum, one 5.0 mL gold (SST), 7.0 mL red top tube or Li Heparin Plasma
Allow serum to clot completely at room temperature (minimum: 30 minutes). Centrifuge and separate serum from cells ASAP.
Frozen (at or below -20°C)
Grossly hemolyzed specimens and plasma
AFTER SEPARATION FROM CELLS: Ambient (20-25°C): 3 hours; Refrigerated (2-8°C): 5 days; Frozen (at or below -20°C): 2 months
Samaritan Health Services-GSRMC
Interpretation of %fPSA Ratio:
A higher percentage of free PSA indicates a lower
probability of finding carcinoma on biopsy in patients
with total PSA between 4 and 10 ng/mL. Different
authorities recommend percentages of free PSA less than
24-27% before proceeding to biopsy in these patients.
Method: electro-chemiluminescence on the Roche COBAS 6000
Free: 84154 <br>Total: 84153
Thursday, January 5, 2017 03:42:26 AM