无创呼吸机治疗慢性阻塞性肺疾病合并呼吸衰竭的临床疗效观察
무창호흡궤치료만성조새성폐질병합병호흡쇠갈적림상료효관찰
The clinical effect of non-invasive positive pressure ventilation in the treatment of chronic obstructive pulmonary disease combined with type Ⅱ respiratory failure