长时间无创性桡骨动脉血压连续检测法研究与系统开发

发布时间：2018-11-01 15:44

【摘要】：本研究首先分析了容积振动法与容积补偿法的原理，以及详细描述了本研究开发的系统的结构、工作原理、控制电路部分设计以及软件的算法及流程。系统以手腕处桡骨动脉为检测对象，，使用PIC单片机作为控制核心，配合电空变换器、气泵实现压力控制，完成血压的检测。而检测时，袖带压力会始终高于舒张压，致使长时间检测时静脉阻塞，造成淤血与麻木，因此根据人机工程学开发了腕式局部加压装置。使用该装置可提高检测精度与舒适度。在长时间检测时，由于动脉张力的变化或者被测者情绪等变化，会造成检测时血管容积目标值发生变化，从而导致检测出的血压压力曲线与实际血压之间有一定偏差，因此需要考虑消除该误差。以局部容积振动法与小波叠加法分析，完成了实时血管容积目标值的校准。通过实验，该血压连续检测装置具有较高的精度，可以实现长时间血压连续检测。并且根据需求，完成了检测系统UI与数据存储功能。
[Abstract]:Firstly, the principle of volumetric vibration method and volumetric compensation method is analyzed, and the system structure, working principle, control circuit design, algorithm and flow chart of software are described in detail. The system takes the radial artery at the wrist as the detection object, uses PIC single chip computer as the control core, cooperates with the electro-air converter, realizes the pressure control by the air pump, and completes the blood pressure detection. However, the cuff pressure will always be higher than the diastolic pressure during the detection, resulting in venous blockage during long time detection, resulting in congestion and numbness. Therefore, a wrist-type local pressure device is developed according to ergonomics. Using the device can improve the accuracy and comfort of the detection. During a long period of time, the change of arterial tension or the mood of the person will cause the change of the target value of blood vessel volume, which leads to the deviation between the measured pressure curve and the actual blood pressure. Therefore, it is necessary to consider eliminating the error. Based on the analysis of local volume vibration method and wavelet superposition method, the calibration of real time vessel volume target value is completed. The experiment shows that the device has high accuracy and can be used to detect blood pressure continuously for a long time. And according to the requirements, the detection system UI and data storage function are completed.
【学位授予单位】：黑龙江大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：R318.6

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