Laboratory Medicine Program

Prostatic specific antigen (PSA), free
(PSA, free)

Clinical Decription:
Free PSA is the uncomplexed immunodetectable form of Prostatic Specific antigen, a serine protease with chymotrypsin-like activity. The major sit of PSA production is the glandular epithelium of the prostate. High levels of PSA in the blood are associated with prostatic pathology; including prostatitis, benign prostatic hyperplasia (BPH) and cancer of the prostate.
<br/><em>Abbott AxSyM Package Insert and Manufacturer's Manual</em>

Method: Turbidimetric; AxSYM

Component Tests Used: n/a

Reference Ranges Used:
If Free/Total PSA Ratio >0.27, chance of prostate cancer is about 10%; if ratio is <0.17, chance of prostate cancer is about 50%

Specimen Type: serum
Volume: 3 mL (minimum: 1 mL)

Shipping: 4C

Special Instructions: Centrifuge and aliquot sample.

Testing Schedule(s): Monday through Friday 0900-1500 hrs.

Turnaround Time: 1 day

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For more information, call 416.340.5227 or 1.866.865.5227

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