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Test Code FRPSA Prostate Specific Antigen (PSA), Free, Serum or Plasma

Methodology

Dual Monoclonal Chemiluminescent Immunoassay

Specimen Requirements

Container/Tube:

Preferred: Lithium heparin (light green-top)

Acceptable: Serum Gel

 Draw blood, spin down within 2 hours of draw and send 1 mL  of plasma or serum.
Note:  Include patient’s age on request form.

Specimen Stability Information

 

Specimen Type

Temperature

Time

Plasma,lithium heparin / Serum

RT, spun

8 hrs
 

Refrigerated, spun

5 days

 

Reference Values

 

 

Age

Total PSA (ng/mL)

0 – 59 years

< 3.9

60 – 70 years

< 5.4

> 70 years

< 6.2

FREE PSA (FRPSA)
Probability of finding prostate adenocarcinoma (PCA) on needle biopsy when Total PSA is 4-10 ng/mL: 

 

 % FPSA Ratio 50-59 years   60-69 years  >69 years
≤10 49.2 57.5 64.5 
11-18  26.9  33.9  40.8 
19-25  18.3  23.9  29.7 
 >25 9.1 12.2  15.8 

 

Reject Due To

 

Hemolysis

Mild:

ok

Gross:

ok

Lipemia

Mild:

ok

Gross:

ok

Icterus

Mild:

ok

Gross:

ok

 

CPT Coding

84154- free PSA

Performing Laboratory

Huntsville Hospital Laboratory

LOINC Coding

 

Test Name LOINC Code
Prostate Specific Ag. free

10886-0

 

Day(s) Set Up

Monday through Sunday