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Journal of Neurosonology 2009;1(1):46-53.
Two Cases of Common Carotid Artery Occlusion Combined with Patent Internal and External Carotid Arteries: Usefulness of Carotid Duplex Sonography
내경 및 외경동맥의 개방과 동반된 총경동맥 폐쇄 2예: 경동맥 초음파검사의 유용성
Abstract
Common carotid artery (CCA) occlusion is usually associated with occlusion of the ipsilateral internal carotid artery (ICA), the external carotid artery (ECA), or both. However, flow to the ipsilateral ICA may be maintained by collateral vessels in cases of CCA occlusion. We represent two cases of antegrade flow in an ICA and retrograde flow in an ECA with an occluded ipsilateral CCA identified using color duplex sonography. In two cases, color flow Doppler imaging revealed that the unilateral CCA was totally occluded near its origin and that flow was re-established at the bulb. A detailed sonographic study demonstrated anterograde flow in the ICA and retrograde flow in the ECA. Duplex sonography, particularly with color-coded flow imaging, facilitates interpretation in patients with CCA occlusion and a patent ICA by providing an easily visualized roadmap of vascular flow.
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