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A transrectal ultrasound is an imaging test. It uses sound waves to create pictures of a man’s prostate gland. Your prostate gland is in front of your rectum. For this test, a special probe (transducer) is placed directly into your rectum. During the test, tissue samples (a biopsy) may also be taken. The test is done by a specially trained technologist (a sonographer).
You may be asked to clear your bowel before the test. This may be done by injecting liquid into your rectum (an enema). Or it can be done by drinking a special liquid.
You may be asked not to eat or drink anything after midnight the night before the test.
Tell your health care provider about any medicines, herbs, or supplements you are taking. This includes any over-the-counter medicines such as aspirin or ibuprofen.
Answer any questions your provider has about your medical history. This will help your provider tailor the test to your health needs.
You may be asked to change into a gown. You will then lie on your side on an exam table, with your knees bent.
The test is done with a hand-held probe. This is a short, slender rod. It has a sterile, disposable cover. It is also greased (lubricated) with some gel. It is then gently placed inside your rectum.
You will feel pressure from the probe. If you feel pain, let your provider know.
If a biopsy is taken, it is done using a small probe with a very tiny needle on the end. This needle enters the prostate and removes several tiny samples of tissue. These samples are then sent to a lab to be examined. Any discomfort from the biopsy is usually minor.
Before leaving, you may need to wait for a short time while the images are reviewed. In most cases, you can go back to your normal routine after the test. If you had a biopsy, you may see some blood in your urine, sperm, or stool for a day or so. This is normal. Your health care provider will let you know when your test results are ready.
In some cases, a diagnosis can’t be made from the tissue sample that was taken. If this happens, your provider will talk with you about whether you may need another biopsy. Or you may need a different procedure.
Call your provider if you have:
Very bloody urine or stool
A fever lasting 24 to 48 hours
Any other symptoms that your provider asks you to report, based on your medical condition
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