![]() ![]() Because of the detail the free measurement of the PSA blood test provides, PSA total and free levels are frequently measured by people who are at a higher risk of prostate cancer or simply want a more detailed analysis. And so, when the term bioavailable, or free, is used in the context of PSA levels, it represents prostate-specific antigen that is floating freely in the blood unbound to carrier proteins.įree PSA provides additional information when compared to the total PSA levels. However, a small percentage of the prostate-specific antigen ends up being unbound while it circulates in the blood. To get from where the PSA is made to the tissues it exerts its effects on, PSA is transported by carrier proteins in the blood. The free component of this PSA test represents the bioavailable portion of the prostate-specific antigen in the blood. The PSA free & total lab test builds on the total PSA test by measuring the free portion of PSA, or prostate-specific antigen, in addition to the total PSA level in the blood. This PSA total & free test, also known as a PSA free and total blood test, bioavailable PSA test and a prostate-specific antigen free and total test, measures the total and free PSA blood levels. PSA Free & Total Blood Test - More Information ![]()
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