The Effect of Gastric Antrum Ultrasonography on Early Stage of Enteral Nutrition in Critically Ill Patients.

The Effect of Gastric Antrum Ultrasonography on Early Stage of Enteral Nutrition in Critically Ill Patients.

The purpose of this study is to investigate the effect of Gastric Antrum Ultrasonography on Early Stage of Enteral Nutrition in Critically Ill Patients.

Inclusion Criteria:

All patients who need enteral nutrition (through the nose) in ICU ; the length of stay in ICU > 3 days;

Exclusion Criteria:

<18 years old; >90 years old; gastrointestinal surgery history； small blow nutrition； BMI>30kg/m2; pregnancy; prone position>4hours a day