Staircase Nutritional Intervention for Elderly Patients Undergoing Spinal Fusion Surgery

"Fourteen days before admission, different nutritional supplements will be provided according to whether the patient has diabetes and their nutritional status. Patients without diabetes who are malnourished should take enteral nutrition powder mixture three times a day, with each dose providing 265 kCal of energy. Patients without diabetes but at risk of malnutrition should take enteral nutrition powder mixture twice a day. Patients with diabetes who are malnourished should take low - sugar whole - protein enteral nutrition powder three times a day, with each dose providing 250 kCal of energy. Patients with diabetes and at risk of malnutrition should take low - sugar whole - protein enteral nutrition powder twice a day.~During the peri - operative period, a strict 6 - hour fasting of solid food and 2 - hour fasting of clear liquid before surgery is implemented. Two hours after surgery, all patients should take multi - dimensional carbohydrates, which provide 115 kCal of energy. Four ho"

Only nutritional education is provided to patients before admission, without any specific nutritional supplements. During the peri - operative period, patients are required to fast from food and water for 8 hours before surgery. Six hours after surgery, patients are allowed to drink water. They can start consuming liquid food after passing gas from the anus. No specific energy - containing nutritional supplements are given during this period. A nutritional guidance manual is distributed to patients upon discharge, and there are no targeted nutritional interventions or follow - up measures related to energy intake subsequently.