平片诊断动脉导管未闭一个有价值征象——交角消失征  

A Valuable X-ray Sign for Diagnosis of Patent Ductus Arteriosus on Chest Films: Absence of Cross-angle

作　　者：陈剑魂[1] 李孟云[2] 王颖 

机构地区：[1]广州中山医科大学附属第一医院放射科,510080 [2]广东省梅州市人民医院放射科 [3]广州市第二人民医院放射科

出　　处：《影像诊断与介入放射学》1996年第4期193-195,共3页Diagnostic Imaging & Interventional Radiology

摘　　要：本文对110例手术证实动脉导管未闭病例作一回顾性复习,并取150名正常人和38例房隔缺损,74例室隔缺损进行对照观察。在动脉导管未闭组交角消失征检出率82％,其中1/3同时兼有漏斗征,而漏斗征检出率为58％,同时兼有消失征达3/4,可见前者比后者检出率高,统计学上差异有非常显著意义(P<0.01),但两者不一定呈平行关系。在正常人,房缺和室缺组中消失征分别为5％、35％、25％。统计学上与动脉导管未闭组对照差异亦有非常显著意义(P<0.01)。结果表明交角消失征对动脉导管未闭诊断敏感性较高和有一定特异性,特别对小的动脉导管未闭病例,结合心脏杂音常可作出较可靠诊断。交角消失征的X线表现为主动脉弓与肺动脉干在正位胸片上投影构成两突出小弧其间交角尖消失或两孤几乎连成一斜行直线影。本文还讨论了消失征形成的病理基础。110 cases of patent ductus arteriosus (PDA) confirmed by surgery were reviewed in comparison with 150 healthy persons, 38 cases of atrial septal defect and 74 cases of ventricular septal defect. Absence of projected cross-angle between the aortic arch and pulmonary arterial trunk was 82% in the group of PDA on the front chest film, but one was 5%, 35% and 25% in group of healthy persons, group of ASD and group of VSD, respectively. Whereas, detection of infundibular sign was 58% in the group of PDA (P<0. 01). The results showed that the absence of projected cross-angle between aortic arch and pulmonary artery trunk was a valuable sign in diagnosing PDA on the chest film, especially in patients with small PDA without pulmonary artery hypertention. The absence of projected cross-angle sign refers disappeasance of the angle tip between both segments of aortic arch and pulmonary arterial trunk on the front chest film. It's pathologic basis about this X-ray finding was discussed.

关 键 词：先天性心脏病 动脉导管未闭 投影交角消失征 

分 类 号：R541.104[医药卫生—心血管疾病]