超声评价脑动脉狭窄患者肠系膜上动脉血流动力学

Ultrasonography in evaluation on homodynamics of superior mesenteric artery in patients with cerebrovascular stenosis

目的探讨脑动脉狭窄患者肠系膜上动脉的血流动力学改变及两者间的关系。方法采用二维超声及频谱多普勒超声对脑动脉DSA造影证实的45例脑动脉正常老年人和45例脑动脉狭窄老年患者肠系膜上动脉的血流情况进行监测,分析肠系膜上动脉与脑动脉硬化狭窄病变程度的关系及脑动脉狭窄患者肠系膜上动脉血流动力学的特点。结果脑动脉狭窄老年患者肠系膜上动脉的血流量和血管内径较脑动脉正常者明显减小,最大血流速度及平均血流速度明显增大(P均<0.001),两者阻力指数的差异无统计学意义(P>0.05)。结论老年人脑动脉与肠系膜上动脉硬化狭窄病变程度之间有密切关系,脑动脉损害越严重,肠系膜上动脉损害越严重,应重视脑血管供血不足的老年人并发肠缺血的可能。

Objective To explore the homodynamic characteristics of superior mesenteric artery（SMA） in the aged with or without cerebrovascular stenosis,and to observe the substantial relationship between them.Methods Hemodynamics of SMA of 45 aged patients with impaired cerebral blood supply（study group） and 45 aged people with normal cerebral blood supply（control group） confirmed by DSA were monitored with color Doppler ultrasound.Relation between hemodynamics of SMA and severity of cerebral arteriosclerosis were analyzed,and hemodynamic characteristics of SMA between the two groups were compared.Results Compared to control group,blood flow volume and the diameter of the vessel of SMA were significant smaller in study group,and the maximum flow velocity,mean flow velocity were significant larger（all P0.001）.Resistance index had no significant difference between the two groups（P0.05）.Conclusion The cerebrovascular atherosclerosis are dramatically associated with superior mesenteric arterial lesions in aged patients.The severer of the cerebrovascular stenosis,the heavier of the SMA＇s homodynamic changes.Substantial ischemia of intestine should been concerned for patients with impaired cerebral blood supply.