12
Participants
Start Date
June 23, 2018
Primary Completion Date
February 3, 2019
Study Completion Date
April 30, 2019
noninvasive ventilation
dual-limb circuit NIV were given on maquet servo i apparatus
oxygen therapy
oxygen therapy were introduced to the side port of the facemask
The First Affiliated Hospital of Guangzhou Medical University, Guangzhou
Guangzhou Institute of Respiratory Disease
OTHER