不同频率射频用于仿硬化斑块消融方法研究

Study of Imitation Hardened Plaque RF Ablation with Different Frequencies

为研究射频治疗动脉粥样硬化中关键的加热规律和加热能力的问题,该文通过设计两种仿硬化斑块实验结构,使用三种不同频率射频以及多种电极排布方式,探究了射频加热的规律和在特殊结构下的加热能力的问题。实验结果显示,在相同的电压下,加热升温能力和加热面积随着射频频率的增大而提高,同时,在纤维帽中嵌入脂质颗粒的结构下,使用三电极且中间电极极性与两侧电极极性相反时,将中间电极对准脂质颗粒,可以实现对其有效加热。

In order to solve the heat transfer mechanism in radiofrequency treatment of atherosclerosis, we design two experimental structures to simulate the plaque, and use three frequencies and a variety of electrode arrangement, to study the heat transfer mechanism and heating capacity under the special structure. The results show that the temperature increment and heating area increase with increasing frequency. Under the structure in which the lipid particles are embedded in the fiber cap, using three electrodes with opposite polar arrangement between middle electrode and others, achieves effective heating to lipid pool in the plaque.