A bio-optical measuring apparatus according to an embodiment of the present disclosure includes a light source that emits coherent light; and three or more optical receivers that receive reflected light from a living body, of light outputted from the light source toward the living body. The bio-optical measuring apparatus further includes a signal processing unit that obtains a low-noise signal by performing averaging processing based on detection signals outputted from the respective optical receivers in response to reception of the reflected light.

A biological information measurement device includes a first light emitting portion that emits first light, a second light emitting portion that emits second light, a light receiving portion that receives the first light reflected by an epidermis of a skin, a dermis of the skin, and a subcutaneous layer, and the second light reflected by the epidermis and dermis of the skin, and a processing unit that calculates biological information by removing noise, from a first detection signal output based on the first light received by the light receiving portion, using a second detection signal output based on the second light received by the light receiving portion.

An electronic device includes a first optical transmitter, a second optical transmitter, a first optical receiver, and a second optical receiver. The first optical transmitter and the second optical transmitter may respectively transmit a first optical signal and a second optical signal with different wavelengths to a skin surface of a user. The first optical receiver may generate a first PPG signal based on a received first optical signal. The second optical receiver may generate a second PPG signal based on the received second optical signal. The second PPG signal may be used to determine a magnitude of noise in the first PPG signal.

Systems are provided that employ dynamic modeling of heartbeats to process electroencephalography (EEG) signals for the suppression of BCG artifacts. The system may be configured to generate an instantaneous EEG correction for ballistocardiogram (BCG) artifact subtraction, the correction being modeled for a selected latency within a selected cardiac cycle. Cardiac cycles with similar EKG signals at the selected latency to that of the selected cardiac cycle are identified and the EEG signals from these similar cardiac cycles, at the selected latency, are employed to generate a modeled EEG signal that represents the instantaneous contribution from the BCG artifact. Accordingly, the system models BCG artifacts by pooling EEG signals at time instants with similar cardiac dynamics. The resulting modeled EEG signal is taken as the estimated BCG artifact and subtracted from the measured EEG signals to generate artifact-suppressed EEG signals.

One variation of a method for hosting mobile access to dense electroencephalography data includes: receiving a set of signals, in a raw resolution, recorded by a set of channels in an electroencephalography headset during an electroencephalography test; receiving, from a client computing device, a view parameters for viewing the set of signals on a display; calculating a quantity of raw signal points per pixel column of the display based on the view parameters and a length of a segment of the electroencephalography test; for each signal in the set of signals, for each discrete contiguous sequence of the quantity of raw signal points within the segment of the signal, calculating a value set characterizing the discrete contiguous sequence of the quantity of raw signal points in the signal; and generating a static image representing value sets for each channel, in the set of channels, across the segment of the electroencephalography test.

The present invention relates to a sensor device (100, 101, 102, 103) for sensing physiological information of a subject. To efficiently avoid or reduce ambient interference, the sensor device comprises a communication unit (7) for receiving, from an external source, context information indicating one or more of a modulation mode, settings of an interference reduction algorithm, and spectral information indicating an ambient light spectrum, said spectral information allowing the sensor device to determine the modulation mode and/or settings of an interference reduction algorithm, one or more light emitters (1, 2) for emitting modulated light onto the tissue of the subject, and a light detector (4) for detecting light which is transmitted through the tissue or/and which is reflected from the tissue. The sensor device further comprises a light modulator (6) for modulating light in accordance with the modulation mode indicated by or determined from the received context information and a light demodulator (11) for demodulating the detected light in accordance with the modulation mode used by the light modulator for modulating light and/or a processing unit (5) for performing an interference reduction algorithm for reducing ambient light interference with settings indicated by or determined from the received context information.

What is disclosed is a wearable appliance that includes a housing adapted to fit in an ear of a user, an optical transmitter disposed in the housing, an optical receiver disposed in the housing, a wireless network communication device disposed in the housing, an accelerometer disposed in the housing, a microphone disposed in the housing, and a speaker disposed in the housing.

The present disclosure relates to a medical device in the form of a medical guide wire. The medical guide wire can be used in delivering catheters to treatment sites within human vasculature, and can also be configured to simultaneously allow the user to determine the nature of the blockage within human vasculature. The medical guide wire can be used to determine the extent of organization of thrombus by sensing the electrical resistivity across a blockage. The medical guide wire can include a hollow core through which at least two electrical leads run along the partial or full length of the medical guide wire from proximal to distal end of the medical guide wire. The medical guide wire can include two or more sensors at its distal portion and the sensors are separated from each other.

A method for determining a lowest stimulation threshold current level in a group of channels of a neuromonitoring device. The method includes stimulating tissue at a current level from a predetermined range of current levels as a sequence of pulses delivered at a frequency. The stimulating includes increasing the current level of each pulse in the sequence of pulses from an immediately preceding pulse by a first current increment. The method includes determining that a first evocation pulse from the sequence of pulses evokes a first muscular response. The method includes stimulating the tissue with a second evocation pulse from the sequence of pulses to evoke a second muscular response. The stimulating includes decreasing the frequency of the delivery of each pulse in the sequence of pulses and increasing the current level of each pulse in the sequence of pulses from the immediately preceding pulse by a second current increment. The method includes determining that the second evocation pulse from the sequence of pulses evokes the second muscular response.

A device for performing electrical measurements for in-ear monitoring is provided. The device includes an in-ear fixture configured to fit in an ear canal of a user, a first electrode mounted on the in-ear fixture and configured to receive an electronic signal from the skin, and an internal microphone to receive an acoustic signal, propagating through the ear of the user. The device also includes an external microphone coupled to receive an external acoustic signal, propagating through an environment, and a processor that is coupled to an augmented reality headset, the processor identifies a cardiovascular condition, or a neurologic condition of the user based on at least one of the electronic signals, the internal acoustic signal, and the external acoustic signal. A memory storing instructions which, when executed by a processor cause a method of use of the above device. The memory, the processor and the method are also provided.