1, painless gastroscopy Painless gastroscopy is a method in which patients are put into a brief sleep state by infusing appropriate doses of appropriate drugs under the condition of enhanced supervision and stable vital signs, and are awakened quickly after completing the gastroscopy without adverse reactions. This method can reduce the stress reaction of patients during gastroscopy and is painless and does not leave memory, which is suitable for the examination of patients who cannot tolerate gastroscopy insertion in the awake state. 2.People who are not suitable for painless gastroscopy (1) People with acute respiratory tract infection, bronchial asthma, acute attack of chronic bronchitis, emphysema, pulmonary heart disease, snoring and other respiratory diseases. (2) Severe cardiovascular diseases: including malignant hypertension, organic heart disease, cardiac insufficiency, large vessel lesions such as entrapment aneurysm, neurological dysfunction and poor recovery (3) Severe liver and kidney insufficiency. (1) Those with unsatisfactory control of endocrine diseases. (2) Patients with severe allergies and psychiatric disorders, etc. 3.Preparation before painless gastroscopy: (1) Quit smoking one week in advance; (2) Ensure fasting status during the examination; (3) Need to have an escort; (4) Bring recent examination and laboratory reports to the doctor for evaluation if you have comorbidities; (5) Sign the informed consent form. (1) After the examination, the patient can generally be awakened quickly, but should not leave immediately and should stay for more than half an hour. (2) You can eat only after two hours after painless gastroscopy. (3) It is not recommended to do dangerous work such as driving and working at height on the day after painless gastroscopy. (4) If there is any discomfort, consult a doctor promptly.