Gastroscopy consultation and treatment examination without fear Recently, a hospital carried out a new painless gastroscopy – laughing gas inhalation analgesic gastroscopy, applicable to a variety of endoscopy and treatment, greatly reducing the traditional gastroscopy consultation and treatment process generated by abdominal distension, pain, violent vomiting and other discomfort, the patient’s fear of treatment, nervousness, bewilderment, the It transforms the patient’s fear, nervousness, and bewilderment about the treatment into relaxed trust and cooperation, thus changing the compulsive treatment into a pleasant and active treatment. Laughing gas, nitrous oxide, is an inhalation analgesic or anesthetic that does not stimulate the respiratory system and has no adverse effects on the heart, lungs, brain, liver or kidneys. Laughing gas painless gastroenteroscopy is a low level of sedation or conscious sedation, the patient can communicate with the doctor during the operation, and can cooperate with the doctor to change the position. Laughing gas inhalation also has a certain anxiolytic effect, and patients are significantly less distressed when they are conscious. In addition, laughing gas inhalation is easy to quantify, the effect is rapid, 30-50 seconds to produce analgesia, stop inhalation 2-4 minutes most of the lungs can be expelled, rapid and complete resuscitation, the patient can be fully awake and independent activities after the operation. The short-term use of laughing gas has no inhibitory effect on the respiratory circulation and nervous system, and the inhalation gas is a mixture of laughing gas and oxygen, the concentration of oxygen is significantly higher than the concentration of oxygen in the air, which can reduce the incidence of hypoxemia, which greatly expands the applicable population of painless gastroenteroscopy. Compared with intravenous anesthesia, laughing gas is cheaper and has less impact on the respiratory and circulatory system, which is a more convenient and safe method for painless gastroenteroscopy. Laughing oxygen mixture has been used abroad for nearly 160 years and has been proven to be a safe and effective method of pain and anxiety control. According to the regulations of the Ministry of Health, the concentration of laughing gas is sedation when it is <70%, at which time it does not need to be operated by professional anesthesiologists, and when it is >70%, it is anesthesia and needs to be used by professional anesthesiologists. Applying it to endoscopy technology, the use of laughing gas concentration range between 30%-60% can solve the pain, anxiety and fear during endoscopy and treatment. By inhaling the laughing oxygen mixture to the patient, the patient is sedated and analgesic while remaining awake and still having vomiting and coughing reflexes, reducing the risk of misaspiration, infection and respiratory depression during the consultation and treatment. Because of the clear consciousness, the patient can cooperate with the doctor in various position changes, facilitating the doctor’s operation and communication, and reducing medical risks. The operation process does not need to be equipped with a full-time anesthesiologist, which saves resources. Generally, the gastroscopy can be done in 5 minutes by inhaling laughing gas. After the examination, the patient does not need to be resuscitated. At present, many tertiary hospitals in China have carried out this technology and applied it to the gastroscopy treatment of elderly patients, and the clinical application results show that the technology has ideal sedative and analgesic effects, and is safe, comfortable and effective.