Newport E150呼吸机辅助/控制呼吸模式的应用研究

Application Research on Assist/Control-Mode Ventilation of Newport E150 Ventilator

目的:研究Newport E150呼吸机辅助/控制呼吸(AMV/CMV,A/C)的通气规律。方法:选择A/C模式,通气频率(f1)分别为4、6次/min,操作者于CMV的吸气时间(Ti)内、CMV开始后的第4s和第60·f1-1s分别对螺纹管的Y接口吸气(达触发水平),并分为A、B、C组。记录从CMV开始至第(4+60·f1-1)s时AMV及CMV的发生情况,每组测试20次。结果:A组不触发AMV,CMV出现在第60·f1-1s;B组在第4s触发AMV,CMV出现在第(4+60·f1-1)s;C组在第60·f1-1s时触发AMV。结论:AMV在CMV的Ti之外任何时间均可被触发;在AMV开始后的第60·f1-1s若仍无吸气达触发水平,则自动转换为CMV。

Objective To study the ventilatory regularity of assist/control-mode ventilation（AMV/CMV or A/C） of Newport E150 ventilator. Methods The mode selector was set to A/C, the ventilatory frequencies（f1） were set at 4,6 breaths per minute（bpm） respectively. The operator inspired to meet the trigger level through the Y piece connected to corrugated hoses within the inspiratory time of CMV in group A, and inspired at the fourth and 60·f1-1second from the beginning of CMV in group B and C respectively. The appearance of AMV and CMV were recorded from the beginning of CMV to the 4＋60·f1-1second. The test was repeated 20 times in each group. Results AMV was not triggered and CMV appeared at the 60·f1-1 second in group A. AMV was triggered at the fourth second and CMV appeared at the 4＋60·f1-1 second in group B. AMV was triggered at the 60·f1-1 second in group C. Conclusion AMV can be triggered at any time except inspiratory time of CMV. If the ventilator can＇t trigger the patient＇s inspiratory effort from the beginning of AMV to the 60·f1-1 second, the mode will switch to CMV automatically.