A free and total PSA test can be used to diagnose or monitor prostate cancer. PSA is a blood test that measures how much PSA is present in the bloodstream. There are accepted values of both free and total PSA levels based on clinical studies. Depending on the value of the PSA test, the doctor may proceed to recommend other tests in order to diagnose prostate cancer.
How to prepare for the test
There is no special preparation for this test.