The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 17, 2004
Filed:
Mar. 22, 2001
Ralf Dittmann, Söllbrock, DE;
Swen Grünitz-Post, Lägerfeld, DE;
Steffen Leonhardt, Lübeck, DE;
Andrea Gentilini, Zürich, CH;
Adolph Glattfelder, Zürich, CH;
Manfred Morari, Zollikon, CH;
Thomas Schnider, Büren, CH;
Alexander M Zbinden, Bern, CH;
Dräger Medizintechnik GmbH, Lübeck, DE;
Abstract
An arrangement with a control circuit for controlling a numerical value for patient respiration as well as to a process for controlling the numerical value. The numerical value is controlled on the basis of an evaluation of the EEG (electroencephalogram) of the patient ( ) by an EEG sensor ( ), e.g., by determining the so-called BIS (bispectral index). A control of the inspiratory gaseous anesthetic concentrations is cascaded to the control of the EEG value in the manner of a cascade circuit. This has the advantage that a metering device ( ) belonging to the arrangement meters a gaseous anesthetic mixture directly according to the patient's needs. As an alternative, the control of the numerical value is performed on the basis of an evaluation of the expiratory gaseous anesthetic concentrations resolved for individual breaths at the Y-piece ( ) of the respiration circuit ( ) by a gaseous anesthetic sensor ( ), preferably an infrared optical gas sensor.