基于四肢同步检测踝臂指数的方法和临床研究

Detection Method and Clinical Research on Ankle Brachial Index Based on Synchronous Measurements of Four Limbs

目的利用优选法在波形特征法和幅度系数法的基础上提出1种同步采集四肢脉搏波信号和袖套压力波信号无创检测踝臂指数的新方法。方法计算出相邻脉搏波的幅度差值和它们的相对比值,并利用优选法在一定范围内进行突变点的判断。结果该方法能够解决将收缩压以前的点和平均压附近的点误判为突变点的问题,大量的病例分析和临床测试证实了该算法的有效性和可靠性。结论踝臂指数是动脉硬化的一个简便可靠的预测因素,它与传统的动脉硬化危险因素如年龄、血压等有相关性。

Objective To find a new algorithm for detecting ankle brachial index（ABI） non-invasively by synchronous acquisition of four limbs pulse wave signals and cuff pressure wave signals basing on waveform characteristic method and amplitude coefficient method with priority rule.Methods The turning point was judged in certain range by calculating the difference of adjoining pulse waves and their relative ratio under priority rules.Results The method provided a solution to misjudgment problem of the turning point before systolic blood pressure and around average pressure.Many cases analyses and lots of clinical tests proved the algorithm effective and reliable.Conclusion ABI is a handy and dependable predictor of atherosclerosis,it is associated with conventional risk factors such as age,blood pressure,etc.