A Renal Artery Duplex Scan utilizes sound waves to image the blood flow to your kidneys. Your renal arteries will be examined to rule out any renal artery stenosis (blockage or narrowing of the arteries supplying the kidneys). 

Prep: You should eat a light supper the night before the test (around 6:00 p.m.). Do not eat or drink anything after this light evening meal. Do not smoke or chew gum after this evening meal. If you are a DIABETIC, you may eat a light breakfast and take your usual insulin dosage. You may take your other medications as prescribed with small sips of water. 

What to Expect: You will be asked to remove your clothing and put on a gown. You will be asked to lie on your back and may be asked to change positions during the test. Utilizing ultrasound, the sonographer will view your renal arteries, aorta, and kidneys. The test will complete in 1 to 1 ½ hours. You may resume your normal activities immediately following the test.