A renal artery duplex scan is a test that uses sound waves to image the blood flow to your kidneys. The renal arteries are examined to check for renal artery stenosis (blockage or narrowing of the arteries supplying the kidneys).
Why you are having this procedure (symptoms/indications):
Your doctor may have ordered a renal artery duplex scan to evaluate your high blood pressure or you may have known or suspected renal artery stenosis.
Prep for the procedure:
You should not eat or drink anything after your evening meal the day before the test. Do not smoke or chew gum. If you are diabetic, you may have a light breakfast and take your insulin. You should take your medicines with small sips of water.
What to expect:
You will have to remove your clothing above the waist and wear a gown. You will be asked to lie on your back during the test. You may be asked to change positions during the test. The lights in the room will be dim. The sonographer will place a probe (ultrasound transducer) with gel on it on your abdomen. The probe will be moved around your abdomen to see different views of your renal arteries, aorta and kidneys. The test will take about an hour to complete.
There are no known risks associated with this test.
Post procedure instructions/limitations:
You may resume your normal activities immediately following the test.