Duplex ultrasonography of the Peripheral arteries (upper and lower ) is performed to provide an overview of the location, extent and severity of vascular disease which includes :

• Detection of stenosis or occlusions in segments of the peripheral arteries in symptomatic patients with suspected arterial occlusive disease. These patients could present with claudication, rest pain, ischemic tissue loss, an aneurysm, and arterial embolization.
• Monitoring of sites of previous surgical interventions, including sites of previous bypass surgery with either synthetic or autologous vein grafts.
• Monitoring of sites of various percutaneous interventions, including angioplasty, thrombolysis/ thrombectomy, atherectomy, and stent placements.
• Follow-up for progression of previously identified disease, such as documented stenosis in an artery that has not undergone intervention, aneurysms, atherosclerosis, or other occlusive diseases.
• Evaluation of suspected vascular and perivascular abnormalities, including such entities as masses, aneurysms, pseudoaneurysms, arterial dissections, vascular injuries, arteriovenous fistulas, thromboses, emboli, and vascular malformations.
• Mapping of arteries before surgical interventions.
• Clarifying or confirming the presence of significant arterial abnormalities identified by other imaging modalities.
• Evaluation of arterial integrity in the setting of trauma.
• Evaluation of patients suspected of thoracic outlet syndrome, such as those with positional numbness, pain tingling, or a cold hand.
• The Allen test to establish patency of the palmar arch.