The nursing measures for critically ill patients include the following: 1. Monitoring of patients’ vital signs, continuous 24-hour monitoring of patients’ blood pressure, heart rate, pulse rate, oxygen saturation and other key indicators, and close observation of changes in patients’ vital signs. If the patient has a low oxygen saturation of 90%, a progressive drop in blood pressure, and an increased heart rate, it often indicates that the patient’s condition has worsened, and if necessary, the patient needs to be transferred to the ICU for further treatment. 2. Record the patient’s 24-hour in and out volume to avoid over-rehydration of the patient and under-rehydration, resulting in increased burden on the patient’s heart, lungs, and kidneys and causing multi-organ failure. 3, color and nature, and observe whether there is abdominal bleeding, intestinal leakage, biliary leakage, pancreatic leakage and other related complications.