A human-body-signal collection device (10). The human-body-signal collection device (10) includes a reference electrode (210), a first electrode (220) and a second electrode (230), an adjusting and generating device (30), a first collection device (40), and a first feedback device (50). The first electrode (220) outputs the first signal. The second electrode (230) outputs the second signal. The adjusting and generating device (30) is connected to the reference electrode (210) to output a reference signal to the reference electrode (210). The first collection device (40) collects the first signal and the second signal, and generates a first potential-difference signal based on the first signal and the second signal. The first feedback device (50) is connected to the first collection device (40) and the adjusting and generating device respectively. The first feedback device (50) is configured to collect the reference signal and the first potential-difference signal, and based on which, generate a first feedback signal, and use the first feedback signal to compensate for the first potential-difference signal, so that an influence of an artifact caused by a baseline drift of the first potential-difference signal may be eliminated, thereby reducing the influence of the baseline drift on a detected signal, and improving accuracy of a detected human-body-signal.

An ECG system and a method for operating a handheld device that provides input to an ECG system are disclosed. The handheld device has a plurality of receiving channels. Each receiving channel includes an electrode that is adapted for receiving electrical signals from a patient's body when the electrode is pressed against the patient's body at a predetermined location on the patient's body. The method includes monitoring an output signal from each of the channels for any of a plurality of invalid signal conditions during a period of time in which the output signal is used to generate a standard lead or precordial lead trace, signaling a user that the handheld device is improperly positioned on the patient's body, and instructing the user on how to correct a placement of the handheld device based on the detected invalid signal condition.

The present invention relates to a physiological measurement device (11) comprising a plurality of input channels (23), at least two of the input channels including a digital section configured to process a digital signal (d.sub.1, d.sub.2) representing an analog signal (e.sub.1, e.sub.2) present at an electrode (13) assigned to the respective channel, a signal combiner (31) configured to calculate at least one vector signal (x) from at least two processed digital signals (df.sub.1, df.sub.2). To achieve improved common-mode interference mitigation, it is proposed that the digital section of at least one input channel (23) comprise a digital filter (29) configured to filter the digital signal (d.sub.1, d.sub.2) based on a set of filter coefficients (G.sub.1, G.sub.2) and a processor (33) configured for calculating the set of filter coefficients (G.sub.1, G.sub.2) based on the vector signal (x.sub.1).

The present invention relates to a physiological measurement device (11) comprising a plurality of input channels (23), at least two of the input channels including a digital section configured to process a digital signal (d.sub.1, d.sub.2) representing an analog signal (e.sub.1, e.sub.2) present at an electrode (13) assigned to the respective channel, a signal combiner (31) configured to calculate at least one vector signal (x) from at least two processed digital signals (df.sub.1, df.sub.2). To achieve improved common-mode interference mitigation, it is proposed that the digital section of at least one input channel (23) comprise a digital filter (29) configured to filter the digital signal (d.sub.1, d.sub.2) based on a set of filter coefficients (G.sub.1, G.sub.2) and a processor (33) configured for calculating the set of filter coefficients (G.sub.1, G.sub.2) based on the vector signal (x.sub.1).

This disclosure relates to integrated channel integrity detection and to reconstruction of electrophysiological signals. An example system includes a plurality of input channels configured to receive respective electrical signals from a set of electrodes. An amplifier stage includes a plurality of differential amplifiers, each of the differential amplifiers being configured to provide an amplifier output signal based on a difference between a respective pair of the electrical signals. Channel detection logic is configured to provide channel data indicating an acceptability of each of the plurality of input channels based on an analysis of a common mode rejection of the amplifier output signals.

Neuromuscular monitoring is described that uses a novel lead assembly and a monitor that can select the appropriate electrodes on the lead assembly and calibrate the stimulation signals applied to the patient through the lead assembly. The monitoring can also set a noise floor value to reduce the likelihood of an erroneous train of four calculations. The present system can automatically sense train of four response of a patient and reduce the likelihood of false train of four indications.

The present invention relates to a physiological measurement device (11). In order to reduce common mode interference and/or to improve characteristics of the digital input filters (11) of the measurement device (11) without compromising common mode rejection capabilities of the input filters, it is proposed to calculate by means of optimization a set of filter coefficients for at least one digital input filter (31) associated with a specific input channel of the measurement device (11) based on samples (c.sub.i) of multiple input signals (s.sub.i) of the measurement device (11) corresponding to a test signal (TS) applied to multiple input channels of the measurement device (11) and on at least one definition vector (v.sub.j) describing a linear combination of samples (c.sub.i) of at least two input channels.

The present invention relates to a physiological measurement device (11). In order to reduce common mode interference and/or to improve characteristics of the digital input filters (11) of the measurement device (11) without compromising common mode rejection capabilities of the input filters, it is proposed to calculate by means of optimization a set of filter coefficients for at least one digital input filter (31) associated with a specific input channel of the measurement device (11) based on samples (c.sub.i) of multiple input signals (s.sub.i) of the measurement device (11) corresponding to a test signal (TS) applied to multiple input channels of the measurement device (11) and on at least one definition vector (v.sub.j) describing a linear combination of samples (c.sub.i) of at least two input channels.

A parallel biometric signal processor and a method of controlling the parallel biometric signal processor are described. The processor and corresponding method include amplifiers configured to amplify a biometric signal based on an amplifying attribute and converters configured to convert the amplified signal to a converted signal based on a converting attribute. The processor also includes preprocessors configured to preprocess the converted signal based on a preprocessing attribute, and feature extractors configured to extract a set of biometric information from an output signal of the preprocessors.

A body worn patient monitoring device includes a flexible substrate having a plurality of electrical connections adapted to be coupled to a skin surface to measure physiological signals. The flexible substrate is adapted to be directly and non-permanently affixed to a skin surface of a patient and configured for single patient use. A communication-computation module, removably attached to an upper surface of the flexible substrate, is configured to receive physiological signals from the flexible substrate and includes a microprocessor that is configured to process and analyze the physiological signals. A series of resistive traces screened onto the flexible substrate are configured as at least one series current-limiting resistor to protect the communication-computation module.