Dräger Safety Ag&co. Kgaa

Drãgerwerk Ag & Co, Kgaa

Philipp Rostalski

Hans-Ullrich Hansmann

Andreas Mohrmann

Marcus Eger

Thomas Krüger

Rainer Polzius

Karsten Hiltawsky

Arne Tröllsch

Herbert Buchner

Thomas Handzsuj

Jan Boeckmann

Andreas Seeck

Dirk Rahn-Marx

Eike Petersen

Jan Grasshoff

A process and a signal processing unit determine a pneumatic parameter (P) for the spontaneous breathing of a patient. The patient is ventilated mechanically by a ventilator. A lung-mechanical model () and a gradient model () are preset. The lung-mechanical model () describes a relationship between the pneumatic parameter (P) as well as a volume flow signal (Vol′), a volume signal (Vol) and/or a respiratory signal (Sig), which can be measured. The gradient model () describes a value for the pneumatic parameter (P) as a function of N chronologically earlier values of the pneumatic parameter (P) or of a variable correlating with the pneumatic parameter (P). N values for the correlating variable are determined at first. At least one additional value is subsequently determined for the pneumatic parameter (P). N chronologically earlier values of the correlating variable, current signal values, the lung-mechanical model () and the gradient model () are used for this purpose.

Process and signal processing unit for determining a pneumatic parameter with the use of a lung-mechanical model and of a gradient model

A device provides a first data signal that indicates an activity of at least one muscle of a patient that is relevant for an inspiratory breathing effort and a second data signal that indicates an activity of at least one muscle of the patient that is relevant for an expiratory breathing effort. The data signals are generated from electromyography (EMG) signals detected by surface electromyography sensors. A computer is configured to determine breathing phase information on the basis of a breathing signal and to check at least one of the electromyography signals or at least one of the separated signals for detectability of a heart signal component and further to assign the signals to an inspiratory breathing activity as well as to an expiratory breathing activity of the patient as a function of the breathing phase information.

Device and process for providing data signals indicating muscle activities that are relevant for inspiratory as well as expiratory breathing efforts of a patient

A reaction carrier (), a measuring device () and a measuring method for measuring a concentration of gaseous/aerosol components of a gas mixture uses reaction material () which reacts in an optically detectable manner with at least one component to be measured or with a reaction product of the component to be measured. The reaction carrier includes a flow channel () with sections () and extends between connecting elements (). A gas treatment element (), in each of the sections, changes chemical or physical properties of the gas mixture flowing therethrough or reacts, depending on the chemical or physical properties. The sections are separated from each other in a gas-tight manner by a separating element (). A coupling element () opens the separating element and establishes a connection between the sections when the coupling element is activated. The measuring device includes an activation element () to activate the coupling element.

Measuring device, reaction carrier and measuring method

A method selects the setting of a first operating parameter of a ventilation system that includes devices for feeding breathing air to and removing from a patient (), a display device () with a screen () and a computer (). The method includes presetting a first target value range for a first ventilation parameter, calculating permissible first operating parameter values by the computer () for the first operating parameter, so that the first ventilation parameter value is within the target value range if a permissible first operating parameter value is set; calculating values of a preset cost function, which is a function of at least one operating parameter, by the computer (); selecting a first operating parameter value by the computer (), at which the value of the cost function has an optimum; and outputting the selected first operating parameter value on the screen () of the display device ().

Method for setting the operating parameters of a ventilation system

A reaction carrier (), a measuring device () and a measuring method measure a concentration of gaseous/aerosol components of a gas mixture. The reaction carrier () has a flow channel () defining a reaction chamber () with an optically detectable reaction material () reacts with at least one component of the gas mixture or with a reaction product of the component. A humidity measuring element (), of the reaction carrier (), detects a humidity of the gas mixture flowing through the flow channel (). The measuring device () has a humidity detection unit () that reads the humidity measuring element (). A humidity determining unit () determines a humidity based on the detected humidity. The measuring method determines a humidity of the supplied gas mixture in the flow channel () and determines a concentration of the component on the basis of the optically detectable reaction and the measured humidity.

A measuring device () and a measuring method measure a concentration of gaseous and/or aerosol components of a gas mixture. A reaction carrier () has a flow channel () defining a reaction chamber () with an optically detectable reaction material () to react with at least one component or with a reaction product of the component. The measuring device () includes a gas delivery unit () and detection unit () having a lighting device () for lighting the reaction chamber (). An optical sensor () detects the reaction. An evaluation unit () evaluates data of the optical sensor () to determines a concentration. The gas delivery unit () includes a gas delivering device () delivering the gas mixture through the gas outlet channel () and a control/regulation unit () which controls/regulates a flow of the gas mixture through the flow channel () depending on at least one reaction speed parameter.

Measuring device and measuring method

A reaction carrier (), a measuring device () and a measuring method measure a concentration of gaseous and/or aerosol components of a gas mixture. A flow channel (), extends between two connecting elements () and defines a reaction chamber () with an optically detectable reaction material () that reacts a component of the gas mixture or with a reaction product of the component. The reaction carrier () includes a temperature-measuring element (). The measuring device () includes a temperature-measuring element () which records a temperature of the measuring device () and/or of the reaction carrier (), and a temperature-determining unit () which determines the temperature of the gas mixture as a function of the measurement result of the at least one temperature-measuring element (). The measuring method includes determining a concentration of the component on the basis of an optically detectable reaction and the determined temperature of the gas mixture.

A magazine device () and method are provided for a measuring device () for measuring a concentration of gaseous and/or aerosol components of a gas mixture. The magazine device () includes a holding device () for a plurality of reaction carriers (), which have each at least one reaction chamber with a reactant. The reactant is designed to react with a particular component to be measured in the gas mixture or with a reaction product of the component to be measured in an optically detectable manner. A feed device () removes a reaction carrier () of the plurality of reaction carriers () from the holding device () and feed the reaction carrier to the measuring device () for carrying out a measurement of the particular component to be measured in the gas mixture. A control unit () controls the holding device () and/or the feed device ().

Magazine device, measuring system and method for measuring a concentration of gaseous and/or aerosol components of a gas mixture

A measuring system and device (), a reaction carrier () and a measuring method for measuring a concentration of gaseous and/or aerosol components of a gas mixture are provided. The reaction carrier includes flow channels () and a coding that is detectable by a position sensor () to position the reaction carrier flow channels. At least one flow channel defines a reaction chamber () in which optically detectable reaction material () is provided. A position sensor detects a relative position of the reaction carrier. A conveying device () moves the reaction carrier relative to gas connections () of a gas-inlet channel () and a gas-outlet channel () between a measuring position with gas connections via a first flow channel for flushing the gas inlet channel and gas connections via a second flow channel defining a reaction chamber, for measuring the component of the gas mixture.

A measuring device () and a measurement method measure a concentration of gaseous/aerosol components of a gas mixture. A reaction carrier () has a flow channel () defining a reaction chamber () having a optically detectable reaction material (), that reacts with a gas mixture component or with a reaction product. The measuring device () includes a gas-conveying assembly () with a gas-conveying apparatus () conveying the gas mixture and a detection assembly (), which has a lighting apparatus () for lighting the reaction chamber (), an optical sensor () for sensing the optically detectable reaction, and an evaluating unit () evaluating sensor data and determining a concentration of the component of the gas mixture. The detection assembly () senses a speed of a reaction front () propagating in the flow direction in the reaction chamber () and determines a preliminary concentration from the speed of the reaction front ().

A pressure sensor () for a measuring system () measuring concentrations of gaseous and/or aerosol components of a gas mixture with a reaction carrier (), with a flow channel (). The flow channel () forms a reaction chamber () with a reactant (), that enters into an optically detectable reaction, and with a measuring device () with a gas port unit () connecting an inlet channel () and an outlet channel () to the flow channel () and a gas delivery unit (). The pressure sensor () measures a pressure difference of a gas mixture flowing through the gas delivery assembly unit () and/or the flow channel () of the reaction carrier () and has an elastic element (), which is configured to undergo deformation as a function of the pressure difference. A measuring method, a measuring device and a reaction carrier for such a measuring system are also provided.

Pressure sensor, measuring device, reaction carrier and measuring method

A measuring system () and method measure a concentration of components of a gas mixture of gas/aerosol. A reaction support () has a flow channel () that forms a reaction chamber () with an optically detectable reactant () that reacts with at least one component or with a reaction product of the component. The flow channel () is at least partially filled with particles () which have a pre-flow starting position and to which a gas flow is applied through the flow channel () in a flow position. The particles () are designed (configured) in such a manner that the particles () in the starting position and the particles () in the flow position can be optically distinguished. The invention also relates to an optical flow sensor () for determining a flow of a fluid.

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Lübeck, Germany

Philipp Rostalski