PB840呼吸机压力触发做功分析  

Analysis of the Pressure-Triggered Work of PB840 Ventilator

作　　者：郑吉锋[1] 白玫[1] 严汉民[1] 郭米嘉[1] 

机构地区：[1]首都医科大学宣武医院医学工程处,北京100053

出　　处：《中国医疗设备》2015年第6期46-49,共4页China Medical Devices

摘　　要：目的了解PB840呼吸机在不同呼气末正压通气(PEEP)水平及不同压力触发灵敏度下吸气触发做功的变化。方法将FLUKE VT-Plus气流分析仪串联在待测呼吸机与主动模拟肺之间,通过主动模拟肺模拟患者的自主呼吸,应用气流分析仪采集自主呼吸触发呼吸机做功时的呼吸参数及波形。结果主动模拟肺吸气触发流速、实际触发压力和触发做功随PEEP值的增加而增加,其中实际触发压力与设定的压力触发灵敏度的差值反映了内源性PEEP的增加。结论对不同PEEP水平、不同压力触发灵敏度条件下,患者触发呼吸机所需做功的变化进行分析,可辅助医生在进行呼吸机治疗时正确评估患者的病情,使用合理的呼吸模式,设定合适的呼吸机参数,并对患者的呼吸功能进行快速评价,从而提高呼吸机治疗的有效性和安全性。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.

关 键 词：PB840呼吸机 呼气末正压通气 压力触发灵敏度 吸气触发做功 

分 类 号：R197.39[医药卫生—卫生事业管理]