Prostate-Specific Antigen (PSA) in Serum by Immunoassay (Screening Probe)

What Is PSA Testing Used For?

PSA testing is often used as part of routine or targeted prostate health evaluations. It can help monitor symptoms like frequent urination, pain during urination, or changes in urinary flow. Some doctors also use PSA levels to guide follow-up tests if you have symptoms or risk factors, such as age, family history, or benign prostatic hyperplasia (BPH).

How Is This Test Performed?

A blood sample is drawn from a vein in your arm. The sample is processed to separate serum, which is then tested for PSA levels using a sensitive immunoassay method. This test is typically done in a lab setting and results are usually available within a few days.

What Might Influence Your Results?

Several factors can affect PSA levels, including recent ejaculation, prostate massage, urinary tract infections, or certain medications. Age, prostate size, and underlying health conditions also play a role. If you’ve had recent sexual activity or prostate procedures, your doctor may advise waiting before testing.

When Might You Need This Test?

Your doctor may recommend PSA screening if you’re at higher risk for prostate cancer (e.g., age 50+ with no high-risk factors, age 45+ with family history, or other risk factors). It may also be used during follow-up for men with known prostate issues or symptoms like urinary changes.