Objective To evaluate the efficacy of noninvasive positive pressure ventilation(NIPPV) in chronic obstructive pulmonary disease(COPD) patients with respiratory failure.

• 目的评价无创正压通气(NIPPV)对慢性阻塞性肺疾病(COPD)急性加重期并发呼吸衰竭的治疗价值。