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Carotid Duplex

Summary   Ultrasound Features   Pathology   Other Modalities

Protocol   Diagnostic Criteria   Keywords   References 1   Images 10   Show All

Carotid Body Tumor Carotid body tumors are located at the bifurcation between the ICA and ECA. They are solid hypervascular masses. CCA dissection Carotid dissection. Note the intimal flap and double lumen. ECA Temporal Tap ECA responds to temporal tapping. This can be a useful Flow Separation Focal region of turbulence is seen in the normal ICA bulb (flow separation). ICA Stenosis 50-69% ICA Stenosis 50-69%. PSV>125cm/s, ICA/CCA Ratio>2, spectral broadening is present ICA Stenosis 80-99% ICA Stenosis 80-99%. EDV>140cm/s, pronounced spectral broadening and turbulence ICA Waveform Normal ICA waveform demonstrates low-resistance laminar flow. Subclavian Steal Syndrome In this example of subclavian steal, the vertebral artery shows pansystolic reversal with diastolic forward flow. Tortuous ICA Pronounced ICA tortuosity. Trickle Flow Trickle flow in an ICA on color Doppler. Despite impressive degree of narrowing on color, velocity criteria often produce deceptively low velocities.

© 2004 Australasian Society for Ultrasound in Medicine