The main purpose of esophageal manometry is to understand the pressure in the esophagus and the components of gastric reflux into the esophagus, which is usually protected by a certain pressure in the esophagus to keep the stomach contents from flowing back into the esophagus. What kind of patients need manometry? Those who have regurgitation, heartburn, belching, pain behind the sternum and have ruled out heart disease; those who have chronic throat discomfort, coughing attacks at night, asthma and have ruled out bronchial or pulmonary disease should have esophageal manometry. Esophageal manometry can diagnose gastroesophageal reflux disease, esophageal hiatus hernia, cardia failure, diffuse esophageal spasm, etc.