基于呼吸音的呼吸率监测方法研究

Study on Respiratory Rate Monitoring Method Based on Breath Sounds

该文旨在讨论使用呼吸音监测人体呼吸率的可行性。首先提取了呼吸音的平均功率信号,对其使用自相关算法计算呼吸周期。同时对鼻气流压力信号求呼吸周期,将此结果作为参考标准,之后对两组周期数据进行相关性分析以及BlandAltman分析。在呼吸速率相对稳定的情况下,使用呼吸音监测人体呼吸率的方法是可行的;在呼吸速率有明显改变的情况下,现有方法及算法暂时无法通过呼吸音准确地反映呼吸率变化的情况,还需要进一步研究。

The article aims to discuss the feasibility of using respiratory sounds to monitor respiratory rate. The average power of respiratory sounds was created firstly, the autocorrelation algorithm was used to calculate the respiratory cycle. The respiratory cycle of nasal flow pressure signal was calculated simultaneously, and the result was taken as a reference standard, then, two groups of respiratory cycle data were analyzed by correlation analysis and Bland Altman analysis. The respiratory rate is relatively stable, using respiratory sounds monitor respiratory rate is feasible, the respiratory rate changes obviously, the existing methods and algorithm using respiratory sounds are temporarily unable to accurately reflect the changes of respiratory rate, further research is needed.