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Prostate Specific Antigen, Free
|Test Update Information||Free PSA method changed fromSiemens Immulite 2000 to the Abbott Architect i2000 on March 25, 2013|
|Approval req'd?||Yes, contact Chemistry at x3-4820 for patients whose total PSA level is < 2.5 or > 10.0 ug/L.|
|Utilization Guidelines||Although generally recommended for patients with Total PSA values between 4.0-10.0 µg/L the laboratory will accept requests for patients with Total PSA as low as 2.5 µg/L without approval.|
|Performed by||China Basin Chemistry|
|In House Availability||Monday(day shift)|
|Method||Chemiluminescent Immunoassay (Abbott Architect i2000)|
|Container type||Gold top|
|Amount to Collect||2 mL blood|
|Preferred volume||1 mL serum|
|Min. Volume||0.5 mL serum|
|Processing notes||Freeze serum at -20C|
|Normal range||See Additional Information|
|Turn around times||1-8 days|
|Additional information|| Includes PSA, Total.
Medicare Local Medical Review Policy 9718, published in CA Medicare Bulletin 98-2 (February, 1998), applies.
Use of the test is based upon the claim of Catalona et al (JAMA 1995;274:1214) that when PSA levels are in the range of 4.1-10.0 µg/L, a higher proportion of free PSA identifies the patient with a relatively lower likelihood that a biopsy will show cancer.
In patients with Total PSA of 4-10 µg/L:
|Last Updated||4/3/2013 3:01:40 PM|