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颅内夹层动脉瘤(intracranial dissecting aneurysm,IDA)是指由于不同原因引起的血管腔内血进入血管壁间引起血管腔狭窄或血管壁膨出破裂,也有可能动脉壁滋养动脉破裂造成的原发性壁内血肿引起动脉瘤样扩张[1]。IDA根据发生部位的不同分为颈动脉系IDA和椎-基底动脉系IDA。颈动脉系IDA发生在颅底颈动脉管外口以上部位。椎-基底动脉系IDA发生在枕骨大孔以上部位。
Intracranial dissecting aneurysm (intracranial dissecting aneurysm, IDA) is due to different causes of intracavitary blood into the vessel wall caused by stenosis of blood vessels or vessel wall bulging rupture, it is also possible arterial wall nodal rupture caused by the primary Wall hematoma caused by aneurysmal dilatation [1]. IDA according to the different parts of the carotid artery is divided into IDA and vertebrobasilar artery lineage IDA. Carotid artery IDA occurred in the skull base carotid duct above the mouth. Vertebrobasilar artery IDA occurred in the foramen magnum above.