Effects of Helium-Oxygen Mechanical Ventilationin in patients with acute exacerbation of chronic obstructive pulmonary disease
ZHU Shuai-jun1， CHEN Dong-mei1， HE Xin-min2， WONG Qin-yong1*
Journal of Hebei Medical University . 2016, (5): 523 -527 .  DOI: 10.3969/j.issn.10073205.2016.05.007