1, reduce visits and escorts, so as not to affect the patient’s rest, and at this time the patient’s resistance is weak, easy to be spread disease, aggravating the condition. 2.Avoid long-term pressure on local tissues, turn the patient regularly, massage the protruding parts of the bone ridge to promote blood circulation, turn the patient regularly, massage the patient regularly and scrub the whole body every day to prevent decubitus ulcers. 3. Assist the patient to turn, pat the back and cough up sputum, and perform endotracheal aspiration if necessary to prevent the occurrence of pneumonia and pulmonary atelectasis. Li Xiaobing of the Department of Thoracic Surgery of Shanghai Children’s Hospital strictly controls the fluid intake and output. Patients transferred to the ward have intravenous infusion, so please do not adjust the drip rate at will and notify the nurse in time if there is any discomfort. For some patients with special conditions who need to record the intake and output, please record each urine volume and each food intake accurately so that the doctor can adjust the medication and supplemental intake according to the patient’s urine volume in time to control the total balance. 4.For the patients who still need oxygen, the doctor will give you oxygen in time. 5.Please take the medication sent to you by the nurse in time. After valve replacement, please take the oral warfarin tablets at 15:00 every day. If there is epistaxis, gum bleeding, subcutaneous petechial hemorrhage, increased menstruation, etc., please tell the doctor in time so that the dose of anticoagulation can be adjusted.