Abstract: A measured signal amplifier (1) amplifies an EMG sensor signal (E). The measured signal amplifier (1) includes a sensor interface (2) for receiving the EMG sensor signal (E), at least one device interface (3) for receiving an electrical energy signal as well as for transmitting a processed signal (V), an electrically chargeable energy storage device (4) and at least one computer (5). The computer (5) is configured to derive a processed signal (V) from the EMG sensor signal (E) and to control the charging of the energy storage device (4) by the electrical energy signal as a function of the EMG sensor signal (E) received from the sensor interface (2).

Abstract: A lighting device (10) is provided along with an operating light and a process (50), including a process with a computer program, controlling a plurality of lighting elements in a lighting device (10). The lighting elements are divided into a plurality of groups of lighting elements (20a; 20b; 20c; 20d; 20e; 20f; 20g), with each group of lighting elements (20a; 20b; 20c; 20d; 20e; 20f; 20g) including at least two lighting elements. The process (50) includes assigning (52) different characteristics (30a-h) to the groups of lighting elements (20a; 20b; 20c; 20d; 20e; 20f; 20g). A characteristic (30a-h) includes a sequence of different light intensities in temporal subintervals. The process (50) further includes an activation (54) of subsets of lighting elements in the groups of lighting elements (20a; 20b; 20c; 20d; 20e; 20f; 20g) in the temporal subintervals based on light intensities.

Abstract: A device (2) for an electrical impedance tomograph (3) includes an electrode carrier (4), first and second skin electrodes (6, 8), which are arranged on the electrode carrier (4) at mutually spaced locations from one another in the longitudinal direction (L) of the electrode carrier, as well as a first protective circuit (10), which is at least partly enclosed in the electrode carrier (4). A second protective circuit (12) is provided, which is at least partly enclosed in the electrode carrier (4). The first protective circuit (10) is electrically connected to the first skin electrode (6), and the second protective circuit (12) is electrically connected to the second skin electrode (8).

Abstract: A device for detecting electric potentials of the body of a patient has measuring electrode inputs (Y1, . . . , Yn) connected with and a plurality of outputs (A1, . . . , An) via amplifiers (Op1, . . . , Opn). A summing unit (13) is connected with the outputs and outputs a mean value of the signals (E1, . . . , En) output by the amplifiers. Common mode signals are removed from the signals (E1, . . . , En) by a subtracting unit (19) which subtracts the output of the summing unit, amplified by an amplification factor (1/?), from at least a portion of the output of the subtracting unit. The output of the subtracting unit is connected with the inputs of the amplifiers. The subtracting unit amplification factor (1/?) and an amplification (??) of the amplifiers for the output of the subtracting unit are adapted, such that the reciprocal value of the amplification factor (1/?) corresponds to the amplifiers amplification (??).

Abstract: A lighting device (10) is provided along with an operating light and a process (50), including a process with a computer program, controlling a plurality of lighting elements in a lighting device (10). The lighting elements are divided into a plurality of groups of lighting elements (20a; 20b; 20c; 20d; 20e; 20f; 20g), with each group of lighting elements (20a; 20b; 20c; 20d; 20e; 20f; 20g) including at least two lighting elements. The process (50) includes assigning (52) different characteristics (30a-h) to the groups of lighting elements (20a; 20b; 20c; 20d; 20e; 20f; 20g). A characteristic (30a-h) includes a sequence of different light intensities in temporal subintervals. The process (50) further includes an activation (54) of subsets of lighting elements in the groups of lighting elements (20a; 20b; 20c; 20d; 20e; 20f; 20g) in the temporal subintervals based on light intensities.

Abstract: An active protective circuit for a measuring amplifier of an electrical impedance tomograph includes a circuit component arrangement including an electrode input and an output and a control input for a control voltage. The output is configured for connection to a measuring amplifier for an electrical impedance tomograph. The circuit component arrangement creates a conductive connection between the electrode input of the circuit component arrangement and the output of the circuit component arrangement when the applied control voltage is within a first voltage range and does not create a conductive connection when the applied control voltage is within a second voltage range. The voltage being applied to the control input is within the second voltage range when a voltage, which is within a cut-off range, is applied to the electrode input. An electrode belt for impedance tomography has the active protective circuits associated with the electrodes.

Abstract: An EMG measuring system has a signal processing unit (8) and with at least one electrode (4) for measuring a potential difference in a muscle, a muscle fiber or in a skin area of a patient. At least one measured signal representing the potential difference is transmitted from the electrode (4) to the signal processing unit (8). Another signal, which is transmitted to the at least one external device (9), is generated in the signal processing unit (8) on the basis of this measured signal. A signal transmitted from the at least one external device (9) is processed by the signal processing unit (8) and at least one control signal is generated on the basis of this signal.

Abstract: A device detects electric potentials with measuring inputs (7) for connection to measuring electrodes (9), which can be placed on the body of a patient (3). Measuring amplifiers (Op1, . . . , OpN) have a first and a second input as well as an output (11). A summing unit (13, 23) is connected to the outputs of the measuring amplifiers and sends a signal proportional to a mean value of the signals of the outputs of the measuring amplifiers to an output (15, 17) of the summing unit. Each of the measuring inputs is connected to a first input of a measuring amplifier. The second input of each measuring amplifier is connected to the output (17) of the summing unit. A potential output (19) connects to an electrode and to an output of a further amplifier Opc), with an input connected to the output (15) of the summing unit.

Abstract: An EMG measuring system has a signal processing unit (8) and with at least one electrode (4) for measuring a potential difference in a muscle, a muscle fiber or in a skin area of a patient. At least one measured signal representing the potential difference is transmitted from the electrode (4) to the signal processing unit (8). Another signal, which is transmitted to the at least one external device (9), is generated in the signal processing unit (8) on the basis of this measured signal. A signal transmitted from the at least one external device (9) is processed by the signal processing unit (8) and at least one control signal is generated on the basis of this signal.

Abstract: A measured signal amplifier (1) amplifies an EMG sensor signal (E). The measured signal amplifier (1) includes a sensor interface (2) for receiving the EMG sensor signal (E), at least one device interface (3) for receiving an electrical energy signal as well as for transmitting a processed signal (V), an electrically chargeable energy storage device (4) and at least one computer (5). The computer (5) is configured to derive a processed signal (V) from the EMG sensor signal (E) and to control the charging of the energy storage device (4) by the electrical energy signal as a function of the EMG sensor signal (E) received from the sensor interface (2).

Abstract: An active protective circuit for a measuring amplifier of an electrical impedance tomograph includes a circuit component arrangement including an electrode input and an output and a control input for a control voltage. The output is configured for connection to a measuring amplifier for an electrical impedance tomograph. The circuit component arrangement creates a conductive connection between the electrode input of the circuit component arrangement and the output of the circuit component arrangement when the applied control voltage is within a first voltage range and does not create a conductive connection when the applied control voltage is within a second voltage range. The voltage being applied to the control input is within the second voltage range when a voltage, which is within a cut-off range, is applied to the electrode input. An electrode belt for impedance tomography has the active protective circuits associated with the electrodes.

Abstract: A device for detecting electric potentials of the body of a patient has measuring electrode inputs (Y1, . . . , Yn) connected with and a plurality of outputs (A1, . . . , An) via amplifiers (Op1, . . . , Opn). A summing unit (13) is connected with the outputs and outputs a mean value of the signals (E1, . . . , En) output by the amplifiers. Common mode signals are removed from the signals (E1, . . . , En) by a subtracting unit (19) which subtracts the output of the summing unit, amplified by an amplification factor (1/?), from at least a portion of the output of the subtracting unit. The output of the subtracting unit is connected with the inputs of the amplifiers. The subtracting unit amplification factor (1/?) and an amplification (??) of the amplifiers for the output of the subtracting unit are adapted, such that the reciprocal value of the amplification factor (1/?) corresponds to the amplifiers amplification (??).

Abstract: A connection unit (1) connects an impedance tomograph (3) electrically to first and second skin electrodes (6, 8). The skin electrodes (6, 8) are arranged on an electrode carrier (4) spaced from one another in a longitudinal direction L. First and second opposite contact devices (24, 26) are arranged on the electrode carrier (4) and are respectively connected to associated electrodes (6, 8). First and second contact devices (16, 18) are configured for respective detachable connection to the associated first and second opposite contact devices (24, 26). Each contact device (16, 18) has an electric protective circuit (10, 12). A system is provided for an electrical impedance tomograph (3), which system has the connection unit (1).

Abstract: A device (2) for an electrical impedance tomograph (3) includes an electrode carrier (4), first and second skin electrodes (6, 8), which are arranged on the electrode carrier (4) at mutually spaced locations from one another in the longitudinal direction (L) of the electrode carrier, as well as a first protective circuit (10), which is at least partly enclosed in the electrode carrier (4). A second protective circuit (12) is provided, which is at least partly enclosed in the electrode carrier (4). The first protective circuit (10) is electrically connected to the first skin electrode (6), and the second protective circuit (12) is electrically connected to the second skin electrode (8).

Abstract: A filter apparatus (100) having a signal input (101) to which an input signal is applied which contains a useful component and a noise component, a fast signal path (102) and a slow signal path (103) arranged in parallel therewith. The fast signal path and the slow signal path are coupled to the signal input. The fast signal path contains a filter in order to prompt fast filtering of the input signal. The slow signal path contains a filter in order to prompt slow filtering of the input signal. An output of the slow signal path is coupled to the fast signal path by means of a signal line (106). A signal output (104) which is coupled to the fast signal path has an output signal applied to it which essentially contains useful components of the input signal.

Abstract: A process for the detection of optical signals with a light module (10) with at least two light sources (20) operated with on/off times with at least one LED (30). The process includes the steps of operating the at least two light sources (20) with time-shifted on/off times and detecting optical signals with the light source (20) that occurs in the off time at the given time.

Abstract: A method is provided for improving the illumination of an illuminated area (100), especially an operating area, of an illuminating device (10) with at least two light modules (20). The method includes the emission of an illuminant characteristic of the light module (20) with a preset amplitude from each light module (20). The reflected amplitudes of all characteristic light types are detected. The detected amplitudes for each light module (20) are compared. The light intensity of at least one light module (20) is varied on the basis of the comparison of the detected amplitudes for each light module (20).

Abstract: A device detects electric potentials with measuring inputs (7) for connection to measuring electrodes (9), which can be placed on the body of a patient (3). Measuring amplifiers (Op1, . . . , OpN) have a first and a second input as well as an output (11). A summing unit (13, 23) is connected to the outputs of the measuring amplifiers and sends a signal proportional to a mean value of the signals of the outputs of the measuring amplifiers to an output (15, 17) of the summing unit. Each of the measuring inputs is connected to a first input of a measuring amplifier. The second input of each measuring amplifier is connected to the output (17) of the summing unit. A potential output (19) connects to an electrode and to an output of a further amplifier Opc), with an input connected to the output (15) of the summing unit.

Abstract: A method and a device for determine a core body temperature from a flow of heat from the body to a neutral medium via a first sensor element and a second sensor element. A dynamic model is used that describes heat flow with a plurality of parameters including the core body temperature, a first sensor element temperature, and a second sensor element temperature. The first sensor element is arranged on a surface of the body. One of the parameters and the core temperature are estimated such that a difference is minimized between the temperatures indicated by the sensor elements, and the temperatures resulting from the dynamic model at the first and second sensor elements for a plurality of time points which lie temporally prior to a specific time point. An estimated core temperature, where this difference has been minimized, is the core body temperature to be determined.

Abstract: A process for automatic control of a respirator changes between two phases of respiration by checking a detected respiratory breathing activity signal for a threshold criterion. If the threshold criterion is met, a changeover is made.