Fasting is required before gastroscopy, and when to start fasting varies from hospital to hospital, but it should be at least 6-8 hours. Before colonoscopy, it is necessary to prepare the intestine and empty it. When making an appointment for colonoscopy, the hospital will inform you of the medication method.
Try to eat less food rich in pigments such as chocolate and pitaya before gastroscopy and colonoscopy, so as not to affect observation. Remove dentures before gastroscopy. Do a good job in psychological construction and relax before the exam.
Don't smoke two days before gastroscopy, because smoking will lead to the secretion of gastric acid and affect the throat, which will make the throat sensitive and more painful.
Do not eat eight hours before gastroscopy, and do not drink water four hours before gastroscopy. At the same time, relax before gastroscopy and don't be too nervous. Know the process of gastrointestinal endoscopy in advance, and you can cooperate with the doctor during the examination. There is also the need to make an appointment in advance, especially in large hospitals, where there are more patients to be examined and the appointment time is longer, so it is necessary to make an appointment in advance. Be sure to consult your own inspection time. If you are an elderly person, it is best to be accompanied by relatives, so that the patient will not be too nervous. If you have dentures or jewelry, you should take them off before the examination. Also, if you feel like urinating before the examination, you'd better urinate in time, and don't hold your urine. Patients with a history of heart or respiratory system should inform the doctor in time. Before the examination, ECG or respiratory system examination can be done, and if necessary, it should be handled in advance to avoid accidents during the examination.
Gastroscope is mainly used for observation and treatment of esophagus, stomach and duodenal bulb. It is the most commonly used and accurate method to diagnose upper digestive tract diseases and has been widely used in clinic. Fasting is required for more than 6 hours before gastroscopy. If there is obstruction of gastric outflow tract, you need to fast for 2~3 days. Eat normally at dinner the night before gastroscopy, and fast after the morning of gastroscopy to keep an empty stomach. Patients with heavier and weaker constitution should be hydrated before operation, relax their belts before examination, and take off their glasses and removable dentures. In order to avoid nausea and vomiting caused by reflex, local anesthetics such as tetracaine and oxybupivacaine should be taken orally before gastroscopy. You can also take defoamers orally, such as dimethicone and simethicone, so that you can get a clear field of vision during gastroscopy and shorten the time of endoscopic examination. Eat less residue diet two or three days before colonoscopy, eat liquid diet the day before colonoscopy, and start fasting 8 hours before colonoscopy to keep an empty stomach. Those who are not hungry can drink sugar water. If painless colonoscopy is needed, water should be fasted 4 hours before operation, bowel-clearing drugs should be taken at the required time and dosage, and enough liquid should be drunk as required, subject to the discharge of light yellow transparent water samples. If the intestinal preparation is insufficient, the intestinal tract should be cleaned again and enema should be performed when necessary. Infants and the elderly and infirm should be prepared repeatedly to prevent dehydration and electrolyte disorder, and intravenous fluids should be given when necessary.