Fuzzy logic control of depth of anaesthesia using auditory evoked responses

Describes the structure of a real-time control system based on fuzzy logic for the control of depth of anaesthesia (DOA) using the drug propofol. The system uses a fuzzy-neural system for monitoring the depth of anaesthesia based on the auditory evoked response (AER) signals. The control system is based on measuring the auditory evoked response signals using a DSP signal processing chip hosted in a PC where the analysis is carried out. Based on the monitored level of DOA the amount of drug infused to the patient is determined by a rule-based fuzzy logic controller. The patient is represented on a different PC where pre-recorded AER signals are stored and selected according to the infused drug