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Rescue Collateral Flow in Color Duplex Sonography
Author(s) -
Han Sang Won,
Nam Hyo Suk,
Lee Jong Yun,
Koh Hye Sun,
Kim Dong Ik,
Heo Ji Hoe
Publication year - 2005
Publication title -
journal of ultrasound in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 91
eISSN - 1550-9613
pISSN - 0278-4297
DOI - 10.7863/jum.2005.24.8.1137
Subject(s) - medicine , collateral , occlusion , duplex (building) , radiology , carotid arteries , collateral circulation , cardiology , dna , finance , biology , economics , genetics
Occlusion of the common carotid artery (CCA) is generally associated with the absence of blood flow beyond the occluded CCA. 1 However, collateral circulation may preserve the patency of the vessel distal to the occluded CCA, and the occipital artery may provide a rescue connection between the carotid and vertebral arteries when either one is occluded. 2 The accuracy of color duplex sonography in identifying the CCA occlusion (CCAO) is 97% with a sensitivity of 91% and a specificity of 99%. 3 It is also very useful in defining the patent distal vessels above an occluded CCA. In this study, we report a case of a CCAO that showed a patent internal carotid artery (ICA) and external carotid artery (ECA). We describe the color duplex sonographic appearance of the collateral circulation.