EUS is an exploratory procedure to visualize the inside of the walls of various organs and structures (such as the esophagus, stomach, intestines... ) as well as obtain samples of tissue and repair the lesions found. Prior to the realization of this test, the doctor tells the patient that preparation should be done, depending on the organ to be scanned. The procedure is performed by introducing an endoscopic ultrasound (thin, flexible tube with a tiny camera attached that transmits images to a monitor) through the mouth or anus and leads to the area of ​​interest review. Thus, you can perform a digestive endoscopic ultrasound or endoscopy of pancreas in minutes, during which the doctor could make the interventions required, obtaining samples for analysis or repair injuries.