A system for coma evaluation is provided, including: a stimulation-generating module operably affixed to a comatose patient for generating controllable stimulation signals to be applied to a target area on the comatose patient; a biosignal collecting module for acquiring a first EEG signal and a first EOG signal of the comatose patient in temporal association with the stimulation signals; and a processing module communicatively coupled to the biosignal collecting module, for separately processing the first EEG signal to obtain a stimulation EEG signal and a composite EOG signal; for processing the composite EOG, according to a second EOG signal measured without application of stimulation signals, to obtain an EOG signal relating to the induced eye-movement response of the comatose patient; and comprehensively processing the induced EOG signal and the stimulation EEG signal, so as to obtain a second EEG signal and evaluate coma severity of the comatose patient.

A system and method is operable to automatically determine the amplitude and latency of one or more evoked potential (EP) or event-related potential (ERP) from electroencephalography (EEG) data. The EEG data from an EEG scan is separated into one or more epochs containing the desired EP or ERP waveforms. Epochs corresponding to the same type of EP or ERP such as N100, P300, and N400 are averaged automatically. The averaged epochs are automatically filtered in the time-frequency domain using an automatically selected filtering mask associated with the type of EP or ERP. A corresponding peak is automatically identified from the filtered epoch, in which the amplitude and latency is automatically measured.

A system and method is operable to automatically determine the amplitude and latency of one or more evoked potential (EP) or event-related potential (ERP) from electroencephalography (EEG) data. The EEG data from an EEG scan is separated into one or more epochs containing the desired EP or ERP waveforms. Epochs corresponding to the same type of EP or ERP such as N100, P300, and N400 are averaged automatically. The averaged epochs are automatically filtered in the time-frequency domain using an automatically selected filtering mask associated with the type of EP or ERP. A corresponding peak is automatically identified from the filtered epoch, in which the amplitude and latency is automatically measured.

Devices, systems, and methods herein relate to electromyography (EMG) that may be used in diagnostic and/or therapeutic applications, including but not limited to electrophysiological study of muscles in the body relating to neuromuscular function and/or disorders. Sensor assemblies and methods are described herein for non-invasively generating an EMG signal corresponding to muscle tissue where the sensor may be positioned directly on a surface of the muscle tissue including any associated membrane (e.g., mucosal, endothelial, synovial) overlying the muscle tissue. A sensor assembly may include one or more pairs of closely spaced, atraumatic electrodes in a bipolar or multipolar configuration. The first and second electrodes may be applied against a surface of muscle tissue (that may include a membrane overlying the muscle) and receive electrical activity signal data corresponding to an electrical potential difference of the portion of muscle between the electrodes.

Devices, systems, and methods herein relate to electromyography (EMG) that may be used in diagnostic and/or therapeutic applications, including but not limited to electrophysiological study of muscles in the body relating to neuromuscular function and/or disorders. Sensor assemblies and methods are described herein for non-invasively generating an EMG signal corresponding to muscle tissue where the sensor may be positioned directly on a surface of the muscle tissue including any associated membrane (e.g., mucosal, endothelial, synovial) overlying the muscle tissue. A sensor assembly may include one or more pairs of closely spaced, atraumatic electrodes in a bipolar or multipolar configuration. The first and second electrodes may be applied against a surface of muscle tissue (that may include a membrane overlying the muscle) and receive electrical activity signal data corresponding to an electrical potential difference of the portion of muscle between the electrodes.

A system for acquiring ECG pulses includes a common node configured to create a virtual ground, measurement nodes connectable to corresponding ECG electrodes attached to a subject, and an ECG module. The measurement nodes are connected to the virtual ground at the common node via short conductive paths. Each measurement node includes an ADC for converting an ECG signal from the corresponding ECG electrode to a digital signal; an optical converter for converting the digital signal to an optical signal output via output fiber-optic cable; a DC power converter for converting modulated light pulses with an embedded clock signal received via input fiber-optic cable into DC power, the DC power being supplied to the ADC and the digital-to-optical converter; and a clock recovery circuit for recovering the embedded clock signal from the modulated light pulses, the recovered clock signal being provided to the ADC and the optical converter for synchronization.

A system for acquiring ECG pulses includes a common node configured to create a virtual ground, measurement nodes connectable to corresponding ECG electrodes attached to a subject, and an ECG module. The measurement nodes are connected to the virtual ground at the common node via short conductive paths. Each measurement node includes an ADC for converting an ECG signal from the corresponding ECG electrode to a digital signal; an optical converter for converting the digital signal to an optical signal output via output fiber-optic cable; a DC power converter for converting modulated light pulses with an embedded clock signal received via input fiber-optic cable into DC power, the DC power being supplied to the ADC and the digital-to-optical converter; and a clock recovery circuit for recovering the embedded clock signal from the modulated light pulses, the recovered clock signal being provided to the ADC and the optical converter for synchronization.

A system for acquiring electrocardiogram (ECG) pulses from a subject, comprising: a virtual ground; and a plurality of measurement nodes connectable to a plurality of corresponding ECG electrodes, wherein the plurality of measurement nodes are connected to the virtual ground, and wherein each measurement node comprises: a voltage-to-frequency converter (VFC) configured to convert an ECG signal from the corresponding ECG electrode to a frequency signal; an optical converter configured to convert the frequency signal from the VFC to an optical signal, and to output the optical signal via an output fiber-optic cable; and a DC power converter configured to receive a modulated optical signal via an input fiber-optic cable, to recover DC power from the modulated optical signal, and to supply the DC power to at least the VFC and the optical converter.

A system for acquiring electrocardiogram (ECG) pulses from a subject, comprising: a virtual ground; and a plurality of measurement nodes connectable to a plurality of corresponding ECG electrodes, wherein the plurality of measurement nodes are connected to the virtual ground, and wherein each measurement node comprises: a voltage-to-frequency converter (VFC) configured to convert an ECG signal from the corresponding ECG electrode to a frequency signal; an optical converter configured to convert the frequency signal from the VFC to an optical signal, and to output the optical signal via an output fiber-optic cable; and a DC power converter configured to receive a modulated optical signal via an input fiber-optic cable, to recover DC power from the modulated optical signal, and to supply the DC power to at least the VFC and the optical converter.

An apparatus includes two or more medical systems and a low impedance path. The two or more medical systems have respective electrical outputs and respective separate isolation grounds each isolated from power lines and from earth ground, wherein the two or more medical systems are electrically coupled one with the other via the patient. The low impedance path connects the separate isolation grounds of the medical systems to one another, causing one or more leakage currents to flow via the low impedance path instead of via the patient.