4Ambrosino N. Noninvasive mechanical ventilation in acute respiratory failure[J]. Eur Respir J, 1996, 9: 795-807.
5Brochard L, Isabey D, Piquct J, et al. Reversal of acute exacerbation of chronic obstructive lung disease by inspiratory assistance with a face mask[J]. N Eng J Med,1990,323:1523.
6Pennok BE, Crawskow L, Kaplin PD, et al. Noninvasive nasal mask ventilation for respiratory failure-institution of a new theraputic technology for routine use[J]. Chest, 1991,105:441.
