Relief of postoperative pain

The authors explore the application of fuzzy control to postoperative pain, which is a difficult system to treat. There is no precise mathematical model, and it is subject to numerous perturbations. A two-phase controller has been implemented. In the first phase a fuzzy controller takes the system to the setpoint, and in the second phase a controller functions in a semiclosed-loop to maintain the analgesic. The controller was implemented in OPS-83 and in Microsoft-C.<
>