双水平气道正压无创通气对AECOPD合并Ⅱ型呼吸衰竭52例疗效观察
쌍수평기도정압무창통기대AECOPD합병Ⅱ형호흡쇠갈52례료효관찰
Observatinon on therapeutic effect of bi-level positive airway pressure noninvasive ventilation on 52 cases of chronic obstructive pulmonary disease with type II respiratory failure
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