Lab test
Prostate-Specific Antigen (PSA), Free-to-Total Ratio
Below is a plain-language overview of the prostate-specific antigen (psa), free-to-total ratio. The Prostate-Specific Antigen (PSA), Free-to-Total Ratio test evaluates the proportion of free PSA to total PSA in the blood.
What this test is
This test measures the levels of prostate-specific antigen (PSA) in the blood, focusing on the ratio of free PSA to total PSA. It helps provide additional information about prostate health. The test can be used alongside other assessments to offer a more comprehensive view.
What it measures
- Free PSA — reflects the unbound form of PSA in the blood
- Total PSA — includes both free and bound forms of PSA
- Free-to-Total PSA Ratio — provides a percentage that may indicate prostate health
What the test involves
The test involves a standard blood draw, typically from a vein in your arm. The collected sample is then analyzed in a laboratory.
Why it is often ordered
Clinicians generally order this test to gain insights into prostate health, particularly when evaluating the risk of prostate conditions. It is often used to differentiate between benign and potentially more serious issues.
Preparation
Preparation instructions may vary, so it's important to follow the specific guidelines provided by the lab conducting the test.
How results are reported
Results are reported as a ratio of free PSA to total PSA. Reference ranges can differ between laboratories, so it's important to discuss your results with a healthcare provider.
Before you go
- Test preparation requirements
- Turnaround time for results
- Sample collection process
FAQ
Frequently asked questions
What is PSA?
PSA, or prostate-specific antigen, is a protein produced by the prostate gland. It is commonly measured to assess prostate health.
How is the free-to-total PSA ratio used?
The ratio helps distinguish between different prostate conditions, offering more detailed information than total PSA alone.
Is there any special preparation needed for this test?
Preparation can vary, so it's essential to follow the lab's specific instructions for accurate results.
How long does it take to get results?
Results are typically available within 1-3 business days, but this can vary depending on the lab.
Related
Related tests
Locations
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