摘要
目的:评价血管超声技术诊断颈动脉狭窄的临床应用价值.方法:对41例怀疑有颈动脉狭窄的患者行超声(US)和血管造影(DSA)检查,颈动脉狭窄应用NASCET标准测量并计算狭窄率.结果:82支颈内动脉中DSA诊断为正常血管53支、轻度～中度狭窄(≤69%)11支、重度狭窄(≥70%)10支、闭塞(100%)8支;以阴性(正常)与阳性(狭窄或闭塞)为切分点时,超声诊断的敏感度、特异度、阳性预测值、阴性预测值分别为94.2%、90%、94.2%、90%;以血管狭窄率70%为切分点时,其敏感度、特异度、阳性预测值、阴性预测值分别为86.4%、72.7%、89%、66%.结论:血管超声诊断颈动脉狭窄的敏感度较高,但特异度偏低,血管超声可用于颈动脉狭窄的筛选.但对于血管重度狭窄(≥70%)拟行颈动脉内膜剥脱术或经皮颈动脉成形术的患者,术前应行DSA检查.
Objective： To assess the clinical value of Duplex sonography in the diagnosis of carotid artery stenosis. Methods： Duplex sonography and digital subtraction angiography （DSA） were performed in 41 patients with clinical suspected carotid stenosis. Stenosis measurement according to NASCET criteria for DSA was used and correlated with the findings of Duplex sonography. Sensitivity, specificity, positive predictive value （PPV）, negative predictive value （NPV）, were calculated. Results：Of the 82 carotid arteries assessed on DSA,there were normal vessel （n=53）,mild to moderate stenosis （≤69%, n=11）,severe stenosis （≥70% ,n=10） ,occlusion （ 100%, n=8）. Taking abnormal （including occlusion and stenosis） as a cutoff point, the sensitivity, specificity,PPV,NPV was 94.2% ,90% ,94.2% ,90% ,respectively. Taking severe stenosis （≥70%） as a cutoff point, the sensitivity, specificity, PPV, NPV was 86.4%,72.7%,89%,66% respectively. Conclusion： Duplex sonography is an effective technique and could be used as a screening test for the diagnosis and follow up examination of the carotid artery stenosis. For patient with severe stenosis （≥70%）, which is considered as candidate for endarterectomy and percutaneous transluminal carotid angioplasty,DSA should be performed.
出处
《放射学实践》
2005年第9期779-781,共3页
Radiologic Practice
关键词
颈动脉
超声多普勒
血管造影术
Carotid artery stenosis
Duplex sonography
Angiography
