基于容积脉搏波的收缩压测量方法

Systolic Blood Pressure Measurement Based on Volume Pulse Wave

利用脉搏波传播时间测量收缩压需要同时测量心电信号与脉搏波信号,这种方法不具备便携性;因此提出通过光电容积脉搏波测量脉搏波传播时间,进而无创连续测量收缩压的新方法.该方法是通过发射红光的透射式血氧指夹得到容积脉搏波,经过滤波、放大、数字信号处理后得到加速脉搏波,然后根据加速脉搏波的推进波与反射波之间的脉搏波传播时间建立其与收缩压的关系.系统通过ATmega128单片机与安卓手机来实现.针对个体的试验结果表明,该方法测量的收缩压与用电子血压计测量的收缩压有较好的一致性.

The method to measure blood pressure via pulse wave transit time（PWTT）requires monitoring ECG and pulse wave signals simultaneously,which has no portability.A new non-invasive method of measuring systolic blood pressure（SBP）continuously is therefore proposed,in which the PWTT can be obtained simply through volume pulse waves.The volume pulse waves were acquired by a blood oxygen probe with red light emitting diode,and then the accelerated pulse waves were gotten through filtering,amplifying and processing the signals.The PWTT between the progressive and reflected waves of the accelerated pulse waves was calculated and the SBP was calibrated.The system was implemented using the Android cell phone and ATmega128 MCU.The experimental results indicate that there is no obvious difference between the SBP measured by the new system and by an electronic sphygmomanometer with error less than 10 mmHg.