颈动脉斑块突然膨大的可能机理之一是损伤处出血。Texon认为斑块内出血由血流液压引起,它“把斑块拉向脉管中心”,导致血管内膜下出血。根据柏努里方程,这个力由狭窄处的压力衰减所引起。本文报告了狭窄处收缩高峰时流速和它在斑块内出血形成的作用关系。 方法 在颈动脉内膜切除之前,10名颈动脉狭窄患者均行超声多普勒扫描,根据多普勒方程求得血流速度。将颈动脉内膜切除术中所切取的斑块固 One of the possible mechanisms of sudden enlargement of carotid plaque is bleeding at the injury site. Texon believes plaque hemorrhage is caused by hydraulic pressure in the bloodstream, which “pulls the plaque toward the center of the vasculature,” resulting in submerged intima. According to the Bernoulli equation, this force is caused by the pressure decay at the stenosis. This paper reports the relationship between the flow rate at the narrowing peak and its contribution to the plaque hemorrhage. Methods Before carotid endarterectomy, 10 patients with carotid artery stenosis underwent ultrasound Doppler scan, and the blood flow velocity was obtained according to the Doppler equation. Carotid endarterectomy plaque removed