BiPAP呼吸机治疗老年COPD合并Ⅱ型呼吸衰竭的疗效分析
BiPAP호흡궤치료노년COPD합병Ⅱ형호흡쇠갈적료효분석
Analysis of BiPAP ventilator in the treatment of elderly COPD patients combined with type Ⅱ respiratory failure
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