Abstract：Objective To understand the changes in inspiration-triggered work of PB840 Ventilator under different PEEP (Positive End-Expiratory Pressure) levels and pressure trigger sensitivity. Methods FLUKE VT-Plus AirStream Analyzer was connected in series between the to-be-measured ventilator and the active simulated lungs. The active simulated lung could simulate patients’ spontaneous breath. Then, the air stream analyzer was deployed for acquisition of breathing parameters and waveform when the work of PB840 Ventilator was triggered by spontaneous breath. Results With the increase of PEEP value, the speed of air stream triggered by inspiration of the active simulated lung, the actual trigger pressure and the work of trigger increased. The differences between the actual trigger pressure and the set pressure trigger sensitivity reflected the increase of endogenous PEEP. Conclusion Analysis of the changes in patient-triggered work of ventilators under different PEEP levels and pressure trigger sensitivity could help doctors to correctly assess the patient's conditions during ventilator therapy and set proper settings of the ventilator. Moreover, it also contributed to quick evaluation of patients’ breathing function so as to improve the effectiveness and safety of ventilator therapy.
郑吉锋，白玫，严汉民，郭米嘉. PB840呼吸机压力触发做功分析[J]. 中国医疗设备, 2015, 30(6): 46-49.
ZHENG Ji-feng, BAI Mei, YAN Han-min, GUO Mi-jia. Analysis of the Pressure-Triggered Work of PB840 Ventilator. China Medical Devices, 2015, 30(6): 46-49.
