关键词: 心肺复苏, 胸外按压装置, 闭环控制

Abstract: ［Abstract］ Objective To develop a chest compression device for cardiopulmonary resuscitation with closed-loop control of compression depth and compression speed to improve the quality of chest compressions. Methods A chest compression device for cardiopulmonary resuscitation was constructed. High?pressure oxygen was used as the power. The cylinder motion was controlled by a solenoid valve and a proportional valve to achieve the pressing action. The control part adopts the structure of the upper and lower position machines. The lower machine generates the control waveform according to the parameters sent by the upper computer，collects the pressing parameters，and sends them to the upper computer through the CAN bus；the upper computer can set various pressing modes，and can analyze the parameters collected by the lower machine， generate new pressing parameters through fuzzy PID algorithm，thus realize closed-loop control of pressing depth and speed. Results The CPR chest compression device supports a variety of compression modes. Different compression frequencies ， compression/relaxation ratios，compression depths，and compression speeds can be set. The compression depth accuracy is 1 mm. Conclusion This CPR chest compression device achieves closed?loop control of compression depth and speed according to the set compression mode.

Key words: chest compression device, cardiopulmonary resuscitation, closed?loop control