New England · Prostate-Specific Antigen (PSA), Free-to-Total Ratio
Prostate-Specific Antigen (PSA), Free-to-Total Ratio in Vermont
Below is a plain-language overview of the prostate-specific antigen (psa), free-to-total ratio. This test measures the ratio of free prostate-specific antigen (PSA) to total PSA, which can help interpret PSA levels.
What this test is
Prostate-specific antigen (PSA) is a protein produced by cells in the prostate gland. This test calculates the percentage of free PSA compared to the total amount of PSA in the blood.
What it measures
- Prostate-Specific Antigen (PSA), Free — the unbound form of PSA
- Prostate-Specific Antigen (PSA), Total — the sum of free and bound PSA
- Free/Total PSA Ratio — the proportion of free PSA to total PSA
What the test involves
A standard blood draw is required for this test. A healthcare professional will collect a sample of your blood, typically from a vein in your arm.
Why it is often ordered
Clinicians may order this test to help evaluate PSA test results. It is often used in conjunction with other clinical information.
Preparation
Follow any specific instructions provided by the laboratory for sample collection. It is important to inform your doctor about any recent prostate procedures or activities.
How results are reported
Results are typically reported within a few business days. Reference ranges for PSA levels and ratios can vary significantly between laboratories.
Before you go
- Fasting requirements
- Recent activity restrictions
- Specific collection site hours
Cities
Prostate-Specific Antigen (PSA), Free-to-Total Ratio in Vermont communities
Choose your city for local context and to request this test.