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General Information:

Web Links:

Mayo Clinic Laboratories

Test Code FPSA/PSAF Prostate-Specific Antigen (PSA), Free, Plasma

Methodology

Electrochemiluminescence

Performing Laboratory

Sky Lakes Medical Center-Chemistry

Specimen Requirements

Specimen Type: Plasma or Serum
Container/Tube: Green top (lithium heparin) or SST
Specimen Volume:2 mL
Collection Instructions: Avoid hemolyzed or lipemic specimen.
Additional Information: Include patient’s age.

Specimen Transport Temperature

Refrigerate

Reference Values

For men with total PSA between 4.1 and 10.0 ng/mL, a free PSA % decision point of 25% or less will detect 95% of prostate
cancers by biopsy when the total PSA between 4.0 and 10.0 ng/mL.

The above decision point of 25% is supported by the fact that
the probability of prostate cancer is high (56%) when the free PSA
is 10, and the probability of prostate cancer is low (8%) when
the free PSA is 25.

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding

84154

Test Order Code

LAB117