摘要
讨论了基于听诊器的心音采集解析系统,该系统可用于居家心脏状况的监测。心音采集系统包括传统的听诊头、耳机、微型麦克风及IC录音机。通过USB接口将采集的数据传输到计算机,并通过单自由度分析模型提取心音特征波形,计算心音特征值参数[T1,T2,T11,T12],它们是心音特征波形与阈值之间形成的交叉点所确定的时间间隔,与第一心音和第二心音有关,可用来判别正常或异常心音。同时,为了让没有临床经验的使用者很容易地对其心脏状况进行监测,文中也讨论了这些特征值参数易于理解的图解表示。最后,通过对正常/异常心音案例解析,验证了本系统及心音特征波形法的有效性。
This paper is composed with the cardiac sound measurement and analysis system for in-home use of heart abnormality monitoring. The heart sound acquiring system is composed of a traditional chest-piece, earphone, microphone, and IC recorder. The recorded data is transmitted to a computer by USB interface for analysis based on the cardiac sound characteristic waveform（CSCW） method, which is extracted from an analytical model of single degree-of-freedom（SDOF）. Furthermore, the characteristic parameters [T1, T2, T11, T12] are defined by the time intervals between the crossed points of the CSCW and a threshold value （THV）, which are related to the first sound and the second sound and are used for discriminating normal and abnormal heart sounds. Also, an easy-understanding graphical representation for these parameters is considered, so that, even for an inexperienced user, he or she is able to monitor his or her cardiac status easily. Finally, a case study on the abnormal/normal cardiac sounds is demonstrated to validate the usefulness and efficiency of this proposed system and the cardiac sound characteristic wave-form method.
出处
《生物医学工程学杂志》
EI
CAS
CSCD
北大核心
2009年第2期282-287,共6页
Journal of Biomedical Engineering
基金
四川省教育厅自然基金重点项目资助(2004A116)
西华大学人才引进项目资助(R0620907)
西华大学学科建设项目资助(XZD0702-2)
关键词
听诊器
心音
采集系统
心音特征波形
数据处理
Stethoscope Heart sound Measurement system Cardiac sound characteristic waveformData processing
