![]() Remember that, like the brain, the highly metabolic parenchymal organs of the abdomen (liver, spleen, kidneys) demand continuous forward flow in systole and diastole (low-resistance flow). We obtain velocity measurements and waveforms from the abdominal aorta and compare them to the waveforms from the branch artery to assess for changes in velocity and waveform shape.ĭoppler waveforms obtained from the proximal abdominal aorta near the origins of the celiac and renal arteries usually have a low-resistance flow pattern, reflecting the need for continuous forward diastolic flow by the liver, spleen, and kidneys. ![]() The presence of significant atherosclerotic plaque in the abdominal aorta certainly increases suspicion of underlying branch disease, particularly at the origin of the vessels. ![]() It is good practice to include an examination of the aorta during all abdominal arterial studies to detect aneurysm or significant atherosclerotic disease. That is why we always begin our examinations of the mesenteric and renal arteries with an evaluation of the abdominal aorta for plaque, stenosis, aneurysm, dissection, or occlusion. Therefore changes in aortic blood flow related to stenosis (high-velocity flow) or aneurysmal dilatation (low-velocity flow) may be transmitted to its branches. ![]() The abdominal aorta leaves its vascular “imprint” on all its branches. It is important to remember that all abdominal arterial branches identified during our Doppler studies receive blood supply via the abdominal aorta. ![]()
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