PSA, FREE & TOTAL

Test Code: 178Specimen Collection: Serum
Component:


PSA, Free
PSA, Total
% Free PSA

% Free PSA will be calculated when the Total PSA is between 2.0 - 10.0 ng/mL. If the Total PSA is less than or greater than this range, then N/A will be reported.

Method:


IA
IA
CALC

Collection Notes: Samples should be obtained before biopsy, prostatectomy, prostatic massage or digital rectal examination because manipulation of the prostate gland may lead to elevated PSA levels that persist for up to three weeks. Plasma is not acceptable.
Clinical Utility: The percentage of measured PSA existing in the free form is useful in assessing the risk of prostate cancer in patients with borderline or moderately increased total PSA.
CPT Code: 84153, 84154Testing Location: AML
SPECIMEN/STABILITY TYPE
Temperature:

Serum (1 mL)

Ambient
 
8
 
Hours
Refrigerated
 
4
 
Days
Frozen
 
12
 
Weeks
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