1974, Charles published the article "Support System Stent in Ward", which emphasized that malnutrition has many side effects on the function and structure of organs and systems, which can induce diseases and affect the prognosis of diseases. The results of 25 years' research show that there was not only a lack of understanding of malnutrition at that time, but also no satisfactory nutritional treatment. Malnutrition will affect muscle function, immunity and intelligence, and delay the recovery of diseases. After adequate nutritional treatment, malnourished patients recover quickly and the hospitalization days are reduced. Evaluating the nutritional status of patients is the first step of nutritional therapy. Therefore, it is necessary to evaluate the nutritional status of patients regularly. There are many methods to evaluate nutritional status, which are also very accurate. It is very important for clinicians and researchers to understand and pay attention to the role of nutrition in disease prevention and treatment. Many countries and regions have noticed this problem and formulated guidelines for nutritional treatment, such as Australia, Britain, Denmark and Switzerland. Compared with 30 years ago, the malnutrition of hospitalized patients has been much less. But it is still a common phenomenon and has a far-reaching impact on the prognosis of the disease.

The China Office of the International Society for Life Sciences recently organized a retrospective survey to study the incidence of malnutrition in hospitalized patients, the influence of nutritional treatment methods on the incidence of malnutrition and the cost-effectiveness of enteral nutrition. According to the analysis of body mass index (BMI), serum albumin and hemoglobin, the incidence of malnutrition at admission was lower than that before admission, but the incidence of malnutrition at discharge was higher than that before admission. It is pointed out that this change is due to the fact that the medical department did not take nutritional treatment, or nutritional treatment could not meet the metabolic needs, which led to an increase in the incidence of malnutrition.

Whether nutritional therapy is needed, especially the role of enteral nutrition in the treatment of diseases, involves many factors such as ethics, morality and economy. In the United States, all enteral nutrition preparations are classified as medicines and foods, and medical food management is established separately, while in Europe, they are special-purpose medical foods with the same connotation. There is no special classification in China, some are registered as drugs, some are managed according to food, and there is no unified law for effective management. It is the simplest, economical and effective method to correct malnutrition in hospitalized patients by enteral nutrition, especially in line with the physiological process of human digestion, absorption and metabolism. Enteral nutrition is recognized and accepted all over the world.

Because enteral nutrition preparation is more difficult to manage than parenteral nutrition, it is easy to be abused, which increases the management difficulty. Therefore, the relevant institutions should not make decisions to grant, restrict or cancel nutritional treatment based on limited expenses or resources. Successful management experience of other countries should be absorbed, such as whether enteral nutrition preparations are used by nutritionists or clinicians. This will have a far-reaching impact on the popularization of enteral nutrition.