摘要
压力支持通气(PSV)是一种重要的机械通气模式,PSV模式下的人机同步性分为吸气触发同步和呼气触发同步。能否很好地跟随患者的吸气和呼气动作,是呼吸机性能的一个重要评价指标。在各种不同条件下(例如:不同的患者肺类型、不同的呼吸努力程度等),呼吸机都应该能够及时响应患者的吸气动作并给予所需气体。同样地,呼吸机也应该及时响应患者的呼气动作,快速释放肺内压。本文在新型呼吸机E5、Servo i、Evital XL工作于PSV模式时,在主动模肺ASL5000触发压力或流量设置不变的情况下,改变呼吸机的吸气/呼气触发灵敏度,测量流量传递至患者的延迟时间、PSV初始化前的最低吸气气道压等参数,对PSV模式下的人机同步性能予以评价。
Pressure-support ventilation （PSV） is a form of important ventilation mode. Patient-ventilator synchrony of pressure support ventilation can be divided into inspiration-triggered and expiration-triggered ones. Whether the ventilator can track the patient＇s inspiration and expiration very well or not is an important evaluating item of the performance of the ventilator. The ventilator should response to the patient＇s inspiration effort on time and deliver the air flow to the patient under various conditions, such as different patient＇s lung types and inspiration effort, etc. Similarly, the ventilator should be able to response to the patient＇s expiration action, and to decrease the patient lung＇s internal pressure rapidly. Using the Active Servo Lung （ASL5000） respiratory simulation system, we evaluated the spontaneous breathing of PSV mode on ES, Servo i and Evital XL. The following parameters, the delay time before flow to the patient starts once the trigger variable signaling the start of inspiration, the lowest inspiratory airway pressure generated prior to the initiation of PSV, etc. were measured.
出处
《生物医学工程学杂志》
EI
CAS
CSCD
北大核心
2014年第4期793-797,共5页
Journal of Biomedical Engineering
基金
军事计量科研资助项目(JDZYY20111)
关键词
压力支持通气
机械通气
仿真伺服肺ASL5000
人机同步性能
pressure-support ventilation
mechanical ventilation
Active Servo Lung （ASL5000）
patient-ventilator synchronization
