• P J Schreiber and J Schreiber.
• North American Dräger, Telford, PA 18969.
• J Clin Monit. 1989 Jul 1; 5 (3): 201-4.

AbstractThe administration of anesthesia may be viewed as a closed-loop control system consisting of three major components: the anesthesia system, the patient, and the system operator. A monitoring and alarm system during anesthesia should not be limited to only one of the three major components but must include monitoring of the patient, the performance of the anesthesia system, and the action of the system operator. For an alarm system to be successful when an adverse condition occurs, an alarm must be generated and identified, the problem identified and corrected, and the patient stabilized before injury results. The authors describe the characteristics of a structured alarm system that maximizes the time available to correct a potential problem before injury begins, that clearly identifies the cause of the problem, and that prioritizes alarms according to the urgency of the required response. Alarms should be easy to temporarily silence, have built-in alarm default settings to prevent the inadvertant use of settings meant for a previous patient, and have a graphic display that enables the operator to detect problems or trends before an alarm sounds.

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