人工机械通气（AMV）是治疗急性呼吸衰竭常用的治疗手段。ICU的病人病情多很危重，有些为昏迷患者，缺乏自主排痰能力，因而很容易导致痰液淤积，继发和加重肺部感染，甚至痰栓或血凝块堵塞支气管导致肺不张，从而加重呼吸衰竭程度，而此时的常规吸痰则效果不佳。我们采用床旁 Artificial ventilation (AMV) is a common treatment for acute respiratory failure. Patients in the ICU are mostly in critical condition. Some are unconscious and lack of spontaneous sputum production, which can easily lead to sputum deposition, secondary and aggravating lung infections, and even clogging the bronchi with sputum or blood clots leading to atelectasis. Exacerbate the degree of respiratory failure, while the conventional suction is ineffective. We use the bedside