fPSA / tPSA Ratio

The Free PSA / Total PSA Ratio test is a blood test used to assess the risk of prostate cancer in men. PSA (Prostate-Specific Antigen) is a protein produced by the prostate gland. PSA exists in two forms: free PSA and bound PSA. The Free PSA / Total PSA Ratio compares the amount of free PSA to the total amount of PSA in the blood. This test is often used when the total PSA level is in a gray area where diagnosing prostate cancer is challenging. A low Free PSA / Total PSA Ratio may indicate a higher risk of prostate cancer. However, this test is not used to diagnose prostate cancer, but rather as a tool to help doctors assess risk and decide on next steps, such as a prostate biopsy.

  • Oncology

Patient Instructions:
. Abstain from sexual activity, including masturbation, and vigorous exercise at least 48 hours before collection.
. Avoid prostatic examination/massage, sonography, or catheterization 10 days before collection.
Sample Type:
Serum
Result Time:

After 2 hours 30′
After cutoff: 9:00 AM next day

Storage & Transportation:
-
Cutoff Times:

9:30 PM Monday – Saturday
8:30 PM Sunday

30 minutes required for samples arrived at Cao Thang till receive by Laboratory

Biomakers
  • 1. Free Prostate-specific Antigen (Free PSA)
  • 2. Total Prostate-specific Antigen (Total PSA)*
  • 3. Free PSA / Total PSA Ratio

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