The maximum length of time an elderly person can live with nasal feeding depends on the different conditions of the elderly to make a comprehensive analysis. First, if the elderly belong to the patients with cerebral infarction and cerebral hemorrhage, they need to be bedridden for a long time and are not able to move on their own. At this time, nasal feeding treatment can be given to replenish enough energy, and most patients can survive for about 10 years if they do not have deep vein thrombosis of lower limbs, sacrococcygeal pressure sores and lung infections. Second, if during the process of nasal feeding, the elderly develop pneumonic pneumonia due to the reflux of gastric contents, the formation of deep vein thrombosis in the lower limbs due to prolonged bed rest or the formation of sacrococcygeal pressure sores induced by not turning over and patting the back regularly. In the case of these complications, the survival time of the patient is at most about 12 months, even if adequate energy is given. Most often, patients die because of the combination of severe complications.