Withdrawing  mechanical ventilation in acute exacerbation and type  Ⅱ  respiratory failure in chronic obstructive pulmonary disease with acute heart failure
Wang Jianjun， Dong Haishan， Wen Lirong
Clinical Focus . 2017, (5): 432 -436 .  DOI: 10.3969/j.issn.1004-583X.2017.05.014