微型植入式医疗电子设备的信号传导机制

Signal transmission mechanism of miniature implantable medical electronic devices

微型植入式医疗电子设备是一种长时间埋于人体,用于监测生理特征的微型医疗器械。为了研究微型植入式医疗电子设备如何利用电信号实现植入物与体表检测设备的通信,并分析信号传导机制,本研究利用数学建模的方法,通过设定合理的边界条件和假设,建立微型植入式医疗电子设备体导通信信道模型。为了验证体导通信信道模型的解的准确性,建立了等效的数值解模型,通过分析体导通信信道模型和数值解模型的结果,发现两种模型的误差小于1%。为了验证体导通信信道模型与实验结果的一致性,选用文献中的实验数据来进行验证,通过对比实验结果与体导通信信道模型计算结果,发现体导通信信道模型的解和实验结果误差小于4 dB,具有良好的一致性。因此,体导通信信道模型的解是准确的,体导通信信道模型与实验也有较好的一致性。

Miniature implantable medical electronic devices are a kind of miniature medical equipments embedded in human body for a long time and used for monitoring the physiological characteristics.In order to study how to use electrical signals to realize the communication between the implanted device and the detection equipment on the body surface,and to analyze the signal transmission mechanism,mathematical modeling method is used to establish an intrabody conduction communication channel model of miniature implantable medical electronic device by setting reasonable boundary conditions and assumptions.An equivalent numerical solution model is also established for verifying the accuracy of the solution of the proposed model.The analysis on the results of intrabody conduction communication channel model and numerical solution model shows that the error between them is less than 1%.Moreover,the experimental data in the references are selected to verify the consistency of the intrabody conduction communication channel model and the experimental results.By comparing the experimental results and model calculation results,it is concluded that the error between the solution of the model and the experimental results is less than 4 dB,with good consistency.The solution of the model is proved to be accurate,and there is a good consistency between the model results and the experimental results.