Anesthesia device, system and method

• US 7,556,036 B2
• Filed: 10/13/2005
• Issued: 07/07/2009
• Est. Priority Date: 10/19/2004
• Status: Active Grant

• Current Assignee: Dragerwerk AG & Company KGaA (FPS Vermögensverwaltung GmbH)
• Original Assignee: Drager Medical AG & Co KG (Dragerwerk AG)
• Inventors: Bouillon, Thoasm, Schumacher, Peter
• Primary Examiner(s): Yu; Justine R
• Assistant Examiner(s): Shome; Arundipta
• Application Number:
  US11/250,026
• Publication Number:
  US 20060081244A1
• Time in Patent Office: 1,363 Days
• Field of Search: 128/203.12, 128/203.13, 128/203.14, 128/203.22, 128/204.21, 128/204.23, 128/204.12, 128/200.24, 600310-314, 604/503, 604/504, 604/512
• US Class Current: 128/203.15
• CPC Class Codes: A61M 16/18 Vaporising devices for anaesthetic preparations

Abstract

An anesthesia device has a device (4, 5) for the supply of at least one first anesthetic and a second anesthetic in a quantitatively settable, controlled manner. A data processing unit (6) with a corresponding display (8) is set up for determining the current concentrations in the plasma or at the site of action from continuously supplied data on the quantities of the anesthetics administered with a module (10) for a pharmacokinetic compartment model calculation and for storing these concentration values. Concentration data is predicted for at least one point in time in the future and this is also calculated. An action module (20) keeps ready the curve of at least one anesthesia action parameter as a function of the concentrations of the anesthetics in a stored manner. A display module (30) displays on the display (8) at least one action diagram, in which the concentration of the first or second anesthetic as well as the sequence of the concentration data of the anesthesia curve obtained up to that point in time are displayed and the predicted concentration data are displayed with a separate symbol. In case of comparison with concentration set points, it is also possible to act automatically on the feed of the anesthetics in a controlled manner with the predicted concentrations.

Claims

1. An anesthesia process, comprising the steps of:

providing a feed device for feeding at least a first anesthetic and a second anesthetic in settable quantities;

providing a display;

providing a data processing unit connected to the display;

providing a pharmacokinetic compartment model calculation module to determine current concentrations of a first anesthetic and a second anesthetic in a plasma or at a site of action and to store concentrations of said first anesthetic and said second anesthetic continuously as a time sequence of concentration data, wherein concentration data of the first and second anesthetics predicted for at least one point in time in the future are also calculated by means of the pharmacokinetic compartment model calculation module;

providing response curves for at least one anesthesia action parameter as a function of the concentrations of the first and second anesthetics; and

displaying on the display at least one action diagram, in which the concentrations of the first and second anesthetics are displayed on a first axis and a second axis respectively, wherein response curves are superimposed to a system of coordinates of the first and second axis, said displaying includes displaying the sequence of the concentration data of the first and second anesthetics as a sequence of points, which are connected to one another as a trajectory, displaying a current concentration status with a symbol and displaying predicted concentration data with a separate symbol.

2. An anesthesia process in accordance with claim 1, wherein the concentration data of the first and second anesthetics predicted for at least one point in time in the future are also calculated under an assumption of a feed continued in a defined manner.