Intravenous Infusion of Lidocaine in ERCP

This study divide patients into two groups, one will be given lidocaine; another group was given placebo . to observe two groups of patients blood pressure, body movement, and propofol dosage , and the difference in operator satisfaction, and how many people need to give fentanyl again; and two groups of patients after the operation of the reaction, if there are dizziness, nausea, and other adverse reactions; finally, the differences of these two schemes in different populations were analyzed, and the rationalization and individualized medication will be put forward.