Evaluation of Blood Flow in Carotid Artery Stenosis Using B-Flow Sonography
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概要
- 論文の詳細を見る
B-flow ultrasonography can directly visualize blood streams by reflecting the intravascular red blood cells, and so can detect turbulent flow in vessels. B-flow sonography was used to evaluate flow abnormalities in patients with cervical carotid artery stenosis, and to investigate the mechanism of large embolus formation that may cause distal arterial occlusion. Twenty-two patients with ≤60% stenosis of the cervical carotid artery excluding cardiovascular embolism were examined by B-flow and color Doppler sonography. Two patients had distal embolism as revealed by digital subtraction angiography, 16 patients had lacunar infarction, and four patients had transient ischemic attacks. B-flow sonography demonstrated reverse flow at the poststenotic site in patients with ≥70% stenosis. Increased echogenicity at the site of the stenosis was seen in patients with at least 80% stenosis. Prestenotic reverse flow was seen in nine patients with ≥85% stenosis. The two patients with distal embolism had decreased echogenicity and flow velocity, and diastolic flow was absent. B-flow sonography could detect various turbulent flow patterns and changes in echogenicity associated with cervical carotid artery stenosis. Prestenotic reverse flow and decreased flow velocity may be potential causes of distal embolism. B-flow sonography is a useful method for the evaluation of flow abnormality in patients with carotid artery stenosis.
- 日本脳神経外科学会の論文
- 2003-11-15
著者
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HOUKIN Kiyohiro
Department of Neurosurgery, Sapporo Medical University
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TAKAHASHI Akira
Department of Dermatology, School of Medicine, Fukuoka University
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Houkin Kiyohiro
Department Of Neurosurgery Sapporo Medical University Sapporo Hokkaido
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Mikami Takeshi
Department Of Veterinary Microbiology Faculty Of Agriculture The University Of Tokyo
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Mikami Takeshi
Department Of Epizootiology Faculty Of Veterinary Medicine Hokkaido University
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Mikami Takeshi
Department Of Neurosurgery Sunagawa City Medical Center Sunagawa Hokkaido
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Houkin Kiyohiro
Department Neurosurgery Sapporo Medical University School Of Medicine
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Takahashi Akira
Department Of Neurosurgery Sunagawa City Medical Center Sunagawa Hokkaido
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Takahashi Akira
Department Of Advanced Materials Science And Engineering Faculty Of Engineering Yamaguchi University
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MIKAMI Takeshi
Department of Cardiovasology, Surugadai Nihon University Hospital
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