Patients meeting inclusion and exclusion criteria were randomly assigned to the intervention group and control group. During the first week of initiation of nutrition, enteral nutrition was conducted according to different procedures to observe the impact of different feeding procedures on clinical indicators
In critical ill patients, feeding protocol is one of the important factor which determines the successful implementation of enteral nutrition（EN）. Acute gastrointestinal injury(AGI) affects feeding tolerance, which greatly determines the successful implementation of feeding protocol. In our previously study, we found that transabdominal intestinal sonography is helpful to diagnosis AGI. Thus in this study ,we apply transabdominal gastrointestinal sonography to feeding protocol, to assess the feasibility of gastrointestinal sonography assisted enteral nutrition and its impact on critical ill patients.