extubate ratio: the group of nasal trachea cannula .%, the group of oral trachea cannula .%(P<0.0);
extubate ratio: the group of nasal trachea cannula .%, the group of oral trachea cannula .%(P<0.0);
拔管率:经鼻插管组 .%,经口插管组.%(P<0.0);
extubate ratio: the group of nasal trachea cannula .%, the group of oral trachea cannula .%(P<0.0);
拔管率:经鼻插管组 .%,经口插管组.%(P<0.0);