Renal Arteries provide blood flow to the kidneys.

Indications for renal artery duplex sonography include to:

• Evaluation of patients with hypertension, particularly when there is a moderate to high suspicion of renovascular hypertension.
• Follow-up of patients with known renovascular disease who have undergone renal artery stent placement or other renal artery interventions or have known unilateral stenosis with concern for stenosis in the contralateral kidney;
• Evaluation of an abdominal or flank bruit;
• Evaluation of a suspected vascular abnormality such as an aneurysm, pseudoaneurysm, arteriovenous malformation, or arteriovenous fistula;
• Evaluation of renal insufficiency in a patient at risk for renovascular disease.
• Evaluation of renal artery blood flow in patients with known aortic dissection, trauma, or other abnormalities that may compromise blood flow to the kidneys.
• Evaluation of discrepant renal size.