Fundamentals of feedback control: PID, fuzzy logic, and neural networks

Feedback controllers have been shown to bring blood pressure, muscle relaxation, inhalation drug concentration, and ventilation to the target level and keep it at the target as quickly and as accurately as can a well-trained clinician. Feedback control is an effective and convenient clinical tool for optimizing the day-to-day delivery of anesthetics, reducing induction time, delivering a minimum amount of drug, and avoiding costly delays from failing to keep the patient in a desired state.