Home
HelpTest Code FTPSA PSA, Free And Total
Specimen Type
Blood
Preferred Collection Container
SST
Collection Volume
5 mL
Minimum Collection Volume
1 mL
Collection Instructions
Routine venipuncture, collect blood in SST or red top. Centrifuge and aliquot into plastic vial, within 3 hours of collection, and refrigerate.
Rejection Criteria
Specimen not centrifuged within 6 hours of collection; Inadequate labeling, improper collection, gross hemolysis.
Specimen Storage and Stability
Separate serum and freeze in plastic vial if specimen cannot be processed within 24 hours.
Turn Around Time
1 Day
Lab Department
Chemistry
Alias
PSA, Free; Free Prostate Specific Antigen, Serum; Free and Total PSA; Free PSA;
Ordering Info
TEST INCLUDES:
PSA, Free PSA and calculated Percent Free PSA
EPIC Code
LAB171
Acceptable Collection Container
SST, R-NoGel
Testing Volume
0.5 mL (500 ul)
Patient Preparation
Specimens for PSA testing should be drawn prior to such prostatic manipulations as digital rectal exam (DRE), prostatic massage, transrectal ultrasound (TRUS), and prostatic biopsy. DRE may cause a transient increase in serum PSA levels. A repeat PSA measurement in the case of borderline elevation has been recommended. Transrectal needle biopsy has also been shown to cause persisting PSA elevations. Thus, a 6-week waiting period between needle biopsy and PSA sampling has been recommended.
Additional Information
Interfering substances: Anticoagulants.
Day(s) and Time(s) Performed
Monday through Sunday, 24 hours