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机械通气是治疗呼吸衰竭的主要手段。呼吸机接收到吸气指令到吸气阀开放的过程称为触发(trigger),常规的触发形式有多种,包括时间、压力和流速触发等[1]。近年来,通过膈肌电活动(electrical activity of the diaphragm,EAdi)控制的神经调节辅助通气(neutrally adjusted ventilator assist,NAVA)这一新的机械通气触发形式的出现,能够在神经传导水平触发呼吸机,相对于其他模式而言,触发处于呼吸神经肌肉运动的上游,受漏气等影响较小,同时在时间和通气水平上与患者的需求相匹配。一、NAVA的研发与工作原理早期的呼吸机多为控制通气模式,忽视患者的
Mechanical ventilation is the primary means of treating respiratory failure. Ventilator receives the inspiratory command to the suction valve open process is called trigger (trigger), there are a variety of conventional triggering, including time, pressure and flow rate trigger [1]. In recent years, the emergence of a new form of mechanical ventilation triggered by the electrical activity of the diaphragm (EAdi), a neutrally adjusted ventilator assist (NAVA), has been shown to trigger ventilators at nerve conduction levels, Triggering, in contrast to other modes, is upstream of respiratory neuromuscular motion and is less affected by air leaks, etc., while matching the patient’s needs at time and ventilation levels. First, NAVA’s research and development and working principle Early ventilator mostly controlled ventilation mode, ignoring the patient’s