Renal Doppler

Indicated in patients with suspected secondary hypertension to rule out renal artery stenosis (RAS).

CAUSES OF RENAL ARTERY STENOSIS

Atherosclerosis—Proximal vessel involvement

Fibromuscular dysplasia (FMD)—Distal vessel involvement; young females

Arteritis, Takayasu’s disease

Aneurysm

Neurofibromatosis

Normal renal arteries arise anterolaterally from the branch of aorta.

Right renal artery arises at 10 o’clock position; passes posterior to IVC.

Left renal artery arises at 4 o’clock position; passes posterior to left renal vein.

B-mode—Comment on kidney size and parenchymal echotexture.

CDUS Scanning—Supine position to trace the origin of renal vessel.

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