双水平无创正压通气应用于慢性阻塞性肺疾病合并呼吸衰竭患者72h疗效观察
쌍수평무창정압통기응용우만성조새성폐질병합병호흡쇠갈환자72h료효관찰
The 72 hours's clinical effect observation on bilevel positive airway pressure ventilation in the patients of chronic obstructive pulmonary disease complicated with respiratory failure
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