Yale New Haven Hospital

Department of Laboratory Medicine
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PSA, total and free

Lab Section: 

Chemistry

 

Lab Location: 

Main Lab

Test ID: 

LAB171

 

Methodology: 

Chemiluminescent Immunoassay

Schedule: 

Monday-Friday cutoff 2PM

Reported: 

Daily.

Specimen Requirements: 

Collection:5.0 ml Blood in a Gold Top Tube.
Sample must be spun and refrigerated within 3 hours of collection.
Unacceptable conditions: Gross Hemolysis
Stability: After separation from cells and refrigerated, 7 days

 

Tests in this Panel: 

Test Name

Reference Interval

 

free PSA Percentage

Reference Range:  Reported as a percentage of total PSA when total PSA is between 2-10 ng/mL. See chart below for predictive probability of prostate cancer for free PSA % when total PSA is in this range.

 

 

 

 

 

 

Percent

free PSA

 

Probability of

Cancer

 

 

0-10%

 

56%

 

 

10-15%

 

28%

 

 

15-20%

 

20%

 

 

20-25%

 

16%

 

 

>25%

 

8%

CPT Code(s): 

84153, 84154

Last Changed: 

10/03/17 10:45:31

Last Reviewed: 

10/03/17 10:45:31