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HelpTest 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