基于脉搏波传导时间的无袖带血压测量仪设计

Design of sleeveless blood pressure measuring instrument based on pulse wave transit time

设计了一种无袖带血压测量仪器,它主要由脉搏波测量、数据处理、特征点的提取和数学建模4个部分组成。单片机将脉搏波测量部分输出的数据进行数据处理后以异步串行通信方式传送给上位机,上位机提取脉搏波特征点,计算出脉搏波传导时间,并建立脉搏波传导时间与血压之间的模型关系,从而实现无袖带血压测量。实验结果表明,血压测量标准差小于8 mmHg,符合AAMI推荐的标准差不大于8 mmHg的标准,可初步应用在医疗监护中。

This study designs a sleeveless blood pressure measuring instrument,it mainly consists of four parts,including pulse wave measuring,data processing,feature point extraction and mathematical modeling.Single chip microcomputer processes the data from the output of pulse wave measuring part and sends it to the PC in the way of asynchronous serial communication,the PC software extracts pulse wave feature points and calculates the pulse wave transit time,then builds the relationship formula between the pulse wave transit time and blood pressure,thus can achieve sleeveless blood pressure measurement.The experimental results show that the standard deviation of blood pressure measurement is less than 8mmHg,which is satisfied with the standard made by AAMI,so the instrument can be applied in the medical care preliminary.