Duplex Scanning for Lower Extremity Arterial Disease
An accurate diagnosis of lower extremity peripheral artery disease (PAD) can usually be established based on the clinical history, vascular examination including pulse palpation, and Doppler survey of the femoral and pedal arteries.With the development of symptomatic PAD, i.e., disabling claudication, critical limb ischemia (ischemic rest pain, tissue loss), or peripheral aneurysmal disease, more detailed vascular testing is necessary for disease management. Peripheral arterial testing is best performed in an accredited facility by certified technical personnel and physicians experienced in test interpretation. Measurement of limb blood pressure in conjunction with duplex mapping of the arterial tree should be performed to assess disease location and severity. Duplex ultrasound scanning provides hemodynamic and anatomic information at no risk to the patient and ensures an accurate diagnosis.1–4 Based on disease location and morphology, a decision to proceed with endovascular or surgical intervention is possible.5–9 Other vascular imaging modalities [contrast arteriography, computed tomography (CT) angiography, magnetic resonance angiography (MRA)] do not provide hemodynamic information essential for the evaluation of symptomatic PAD, and formulating an individualized treatment plan.
KeywordsPeripheral Artery Disease Pulsatility Index Peak Systolic Velocity Critical Limb Ischemia Duplex Scanning
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