Clinical Research on the Application of Inertial Measurement Units in Respiratory Cycle Measurement

Objective: The purpose of this study is to explore the feasibility of using inertial measurement unit (IMU) sensors to monitor respiratory cycles.Methods: The study involved monitoring the abdominal wall movements of 8 healthy volunteers for 9 minutes using IMU sensors. Acceleration change signals were extracted conditionally, and the respiratory cycle (Ttot) was calculated Results: The post-filtering algorithm proposed in this study demonstrated high performance in monitoring respiratory cycle time, as evidenced by the Ttot based on waveform recognition, with an average absolute error of 0.2 seconds per respiratory cycle, a correlation of r > 0.88, and a BlandAltman analysis with an average difference of 0.017 seconds. Conclusion: Monitoring respiratory cycles using inertial measurement unit sensors is feasible and can be widely applied in clinical and home settings. This provides a new approach and method for developing low-cost, wearable, real-time, and stable respiratory monitoring systems.