In order to solve endoleak emerged after endovascular aneurysm repair

a wireless blood pressure measuring system based on LC pressure sensor is designed. A chip based on field programmable gate array（ FPGA） is used as main processing unit and wireless measurement is realized using mutual coupling effect between the reader coil and the sensor. A sine signal generator based on direct digital frequency synthesis technology is used to generate driving signals and discrete Fourier transform based on cross-correlation algorithm is used to calculate frequency spectrum of signals. The combination of them improves precision and speed effectively.Experimental results demonstrate that the resolution and the speed of the system is 285 Pa and 24. 1 Hz respectively

meaning that a new approach to measure blood pressure non-invasively is realized.