ED50 of Midazolam Oral Solution for Preoperative Hypnosis in Adults : An Up-and-Down Sequential Allocation Trial

"The ED50 dose of midazolam oral solution for hypnosis is studied using an up-and-down sequential allocation while waiting for surgery and general anesthesia in preoperative room.~The starting dose is 6 mg and the step size is 1 mg. The interval sequential dose is varied by 1 mg based on the hypnosis response of the previous patient after one hour.~Definition of successful hypnosis by taking midazolam oral solution:~The polysomnograph (PSG) not only shows stage N2 within 30 minutes, but also shows stage N3 within an hour; or else, definition of unsuccessful hypnosis.~The procedure is as follows: (1) The first subject is given 6mg of midazolam oral solution; (2) If succeed, the second subject takes 5mg; (3) If not succeed, the second subject takes 7mg; (4) Until seven sequence reversal inflection points."