自胃管饲灌注完毕后，将胃管反折系紧的目的是
A. 防止胃管感染
B. 防止食物反流
C. 防止胃液流出
D. 防止空气进入
E. 以上都正确
The depth of nasogastrie is about
A. 30-35cm
B. 40-45cm
C. 55-60cm
D. 60-65cm
E. 65-70cm
The complications of nasogastrie intubation not include
A. epistaxis
B. aspiration
C. esophageal perforation
D. pylorochesis
E. esophageal erosion
Which is the contraindication of nasogastric intubation
A. a recent history of ingestion of caustic subatances
B. stupefaction
C. trachea cannula
D. upper gastrointestinal bleeding
E. intestinal obstruction
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