Lower Extremity Arterial Study
(ABI, BP & Waveforms)

A Lower Extremity Arterial Study evaluates blood flow in the legs to determine the presence of Peripheral Arterial Disease (PAD). In patients with PAD, blood flow in the legs is abnormal and is decreased by narrowed or blocked arteries. If severe PAD is untreated, it can result in amputation. Blood flow is evaluated using Doppler-derived waveforms and blood pressures, which are used to calculate the Ankle-Brachial Index (ABI). ABI is a measurement of the severity of PAD.

In this examination, blood pressure cuffs and Doppler probes are used. A Doppler probe (a handheld device) sends high-frequency sound waves into the leg to detect the presence and direction of blood flow. This information is used to determine the severity of PAD.

Blood pressures and waveforms in the legs

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