Chang Y J, Lin S K, Ryu S J, Wai Y Y
Department of Neurology, Chang Gung Memorial Hospital, Taipei, Taiwan.
AJNR Am J Neuroradiol. 1995 May;16(5):1099-105.
To demonstrate the efficacy of carotid duplex ultrasound to diagnose common carotid artery occlusion (CCAO) and to define the clinical features of CCAO.
We reviewed 5400 carotid duplex ultrasonograms obtained over a 7-year period for suspected carotid artery disease. In cases of CCAO, medical records were reviewed.
Thirteen cases (0.24%) of CCAO were diagnosed by carotid duplex ultrasonography, including five cases of isolated CCAO. Seven cases were proved by cerebral angiography. Cerebral angiography failed to demonstrate patent internal carotid arteries in two cases of isolated CCAO. Mean age of onset was 67 +/- 9 years. The main clinical presentation was stroke in nine cases (69%). The most common vascular risk factors were hypertension (62%) and heart diseases (54%). Three patients had a history of radiation therapy to the neck. Two of five patients with isolated CCAO had major stroke, with good recovery in one, whereas five of eight patients with CCAO had major stroke; among them, only one had good recovery.
Patients with isolated CCAO may have a better outcome than patients with CCAO. Duplex sonography, particularly with color-coded flow imaging, provides an accurate examination to define the patency of the arteries distal to the carotid bifurcation. The clinical features of CCAO are similar to those of internal carotid artery occlusion except for the low prevalence of CCAO.
证明颈动脉双功超声诊断颈总动脉闭塞（CCAO）的有效性，并明确CCAO的临床特征。
我们回顾了7年间因疑似颈动脉疾病而获得的5400份颈动脉双功超声检查报告。对于CCAO病例，查阅了病历。
通过颈动脉双功超声检查诊断出13例（0.24%）CCAO，其中5例为孤立性CCAO。7例经脑血管造影证实。在2例孤立性CCAO病例中，脑血管造影未能显示颈内动脉通畅。发病的平均年龄为67±9岁。主要临床表现为9例（69%）中风。最常见的血管危险因素是高血压（62%）和心脏病（54%）。3例患者有颈部放射治疗史。5例孤立性CCAO患者中有2例发生严重中风，其中1例恢复良好，而8例CCAO患者中有5例发生严重中风；其中只有1例恢复良好。
孤立性CCAO患者的预后可能比CCAO患者更好。双功超声检查，尤其是彩色编码血流成像，可为确定颈动脉分叉远端动脉的通畅情况提供准确的检查。CCAO的临床特征与颈内动脉闭塞相似，只是CCAO的患病率较低。
