Feedback controllers have been shown to bring blood pressure, muscle r
elaxation, 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 convenie
nt clinical tool for optimizing the day-to-day delivery of anesthetics
, reducing induction time, delivering-a minimum amount of drug, and av
oiding costly delays from failing to Keep the patient in a desired sta
te. (C) 1997 by Elsevier Science Inc.