[Clinical analysis of the effect of non-invasive mechanical ventilation in 519 cases of respiratory failure].
Ma
Zhuang
Z
Huai
Yong-jun
YJ
Zhang
Shao-min
SM
Zhang
Jun-li
JL
D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012121:Respiration, Artificial; D012131:Respiratory Insufficiency / Q000628:therapy*; D012189:Retrospective Studies; D016896:Treatment Outcome