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HelpTest Code PSA Prostatic Specific Antigen
Specimen Type
Blood
Preferred Collection Container
SST
Collection Instructions
Routine venipuncture
Collection Volume
5 mL
Minimum Collection Volume
1 mL
Testing Volume
0.5 mL (500 ul)
Rejection Criteria
Specimens other than serum; Gross hemolysis
Specimen Storage and Stability
Stable up to 7 days at 2-8 C
Day(s) and Time(s) Performed
Monday through Sunday, 24 hours
Alias
PSA; Prostate Specific Antigen, Serum;
Ordering Info
This test is used for diagnostic codes related to sequential testing as follow-up to elevated PSAS or physical exam findings.
EPIC Code
LAB116
Methodology
Immunoenzymatic Assay
Acceptable Collection Container
SST, R-NoGel
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
Turn Around Time
2 Days
Lab Department
Chemistry