time of detained airtube:the group of nasal trachea cannula 8.±7.9d, the group of oral trachea cannula .0±.8d(P<0.0);
time of detained airtube:the group of nasal trachea cannula 8.±7.9d, the group of oral trachea cannula .0±.8d(P<0.0);
留管时间:经鼻插管组8.±7.9d,经口插管组 .0±.8d(P<0.0);