Computer-aided Teaching system of Heart Sound
Wu Xiaolan Peng Chenglin
(The Institute of Biomedical Engineering and Instrument,Chongqing University,Chongqing 400044)
Abstract This paper details a full set of plan of the computer-aided teaching of heart sound. By means of digital sound technology one is capable of playing realistically heart sound of various kinds based on database. Each heart sound is demonstrated by a proper explanation of its characteristics and a heart sound graph. This method gets over the shortages of traditional teaching methods. Besides, this system can be used to test users' level of auscultation.
Key words Computer-aided teaching Heart sound Digital sound technology Database
1 引 言
心音是心脏正常的或者病理的音响，它是由于心脏搏动过程中各瓣膜的开闭以及心肌和血液运动所产生的震动形成的。心音听诊是诊断心脏疾病的重要依据，心音听诊向来是诊断学课程最重要的部分之一，医学院校的学生都必须熟练掌握这一基本技能。
传统的心音听诊教学方法是实习法和讲授法。实习法采用听诊器听取病人心音，无法多人同时听取，也难于寻找用来练习听诊的心脏病例，特别是严重心脏病患者不允许学生轮流练习听诊。讲授法一般采用播放心音磁带的方式来进行听诊教学，由于频繁倒带不方便、因此不便于反复听取同一心音，并且磁带磨损也会严重影响听音效果。采用以上两种方法教学时，教师都不便进行示范讲解，学生也很难得到较强的感性认识。由于传统心音听诊教学方法存在着种种不足，开发计算机辅助心音教学系统就成为医学院校的迫切要求。
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