营养不良是世界范围内住院病人普遍存在的问题,其中癌症病人的发生率最高,尤其是消化道肿瘤病人,可达85%。我国胃癌患病率占各类恶性肿瘤的第二位,术后营养支持对病人预后有着重要作用。EN作为营养支持病人的首选方式,由于诸多因素的影响,病人常常处于EN喂养不足状态,尤其是EEN。EN喂养不足不仅增加病人因使用 Malnutrition is a common problem in inpatients worldwide, of which the highest incidence of cancer patients, especially patients with gastrointestinal cancer, up to 85%. The prevalence of gastric cancer in our country occupies the second place in all kinds of malignant tumors, and postoperative nutritional support plays an important role in the prognosis of patients. EN is the preferred mode of nutritional support for patients and due to a number of factors, patients are often under-nourished, especially EEN. Inadequate feeding not only increases patient use