An electrocardiogram data detection device includes a plurality of electrodes provided in a seat of a vehicle to face the human body, a differential signal generation unit that generates a differential signal between signals of two of the plurality of electrodes and generates a plurality of differential signals from the signals of a plurality of pairs of the electrodes, and an electrocardiogram data detection unit that obtains electrocardiogram data based on the differential signals. The electrodes include at least three first electrodes disposed in a width direction of the seat back within a first region of the seat back close to the seat bottom and at least one second electrode within a second region of the seat back located above the first region. The differential signals are at least six differential signals obtained from the signals of the at least three first electrodes and at least one second electrode.

Systems, devices, and methods for electrophysiological recording from the eye are disclosed herein. An electroretinography device can detect a biopotential signal from an eye of a subject and transmit the same to a processor. Embodiments of the present technology include one or more features directed to improving the use and operability of an electroretinography device. For example, the device can include a proximal inner surface having a recess feature for removing or receiving fluids trapped between the device and the eye. The recess feature can include one or more grooves, channels or textured surface designed to collect and direct fluids away from the space between the device and the eye. The number, shape, size, position, orientation, and other features of the grooves and channels can be varied.

Systems, devices, and methods for electrophysiological recording from the eye are disclosed herein. An electroretinography device can detect a biopotential signal from an eye of a subject and transmit the same to a processor. Embodiments of the present technology include one or more features directed to improving the use and operability of an electroretinography device. For example, the device can include a proximal inner surface having a recess feature for removing or receiving fluids trapped between the device and the eye. The recess feature can include one or more grooves, channels or textured surface designed to collect and direct fluids away from the space between the device and the eye. The number, shape, size, position, orientation, and other features of the grooves and channels can be varied.

The present invention relates to methods for marking positions for or for positioning of six ECG chest electrodes based on a subjects body height, which allows a reproducible placement of the electrodes in serial independent ECG measurements. The present invention further relates to a device for placement of ECG electrodes which implements said method, and methods and uses applying said device. Hence, the present invention provides an accurate and reproducible, easy to use and low-cost method and device for ECG chest electrode positioning, especially in serial examinations and in obese subjects by minimizing the mistakes in ECG chest electrode placement depending on the subjective and inaccurate defining of anatomic remarks for electrode positions.

Systems, devices, and methods for electrophysiological recording from the eye are disclosed herein. An electroretinography device can detect a biopotential signal from an eye of a subject and transmit the same to a processor. Embodiments of the present technology include one or more features directed to improving the use and operability of an electroretinography device. For example, the device can include features for (i) improving the quality of light stimulus delivered to the eye or (ii) providing a better fit around the eye or a contact lens worn on the eye. These features can account for anatomical differences between different subjects by either masking or accommodating such differences.

Systems, devices, and methods for electrophysiological recording from the eye are disclosed herein. An electroretinography device can detect a biopotential signal from an eye of a subject and transmit the same to a processor. Embodiments of the present technology include one or more features directed to improving the use and operability of an electroretinography device. For example, the device can include features for (i) improving the quality of light stimulus delivered to the eye or (ii) providing a better fit around the eye or a contact lens worn on the eye. These features can account for anatomical differences between different subjects by either masking or accommodating such differences.

Systems, devices, and methods for electrophysiological recording from the eye are disclosed herein. An electroretinography device can detect a biopotential signal from an eye of a subject and transmit the same to a processor. Embodiments of the present technology include one or more features directed to improving the use and operability of an electroretinography device. For example, the device can include features for (i) improving the quality of light stimulus delivered to the eye or (ii) providing a better fit around the eye or a contact lens worn on the eye. These features can account for anatomical differences between different subjects by either masking or accommodating such differences.

Systems, devices, and methods for electrophysiological recording from the eye are disclosed herein. An electroretinography device can detect a biopotential signal from an eye of a subject and transmit the same to a processor. Embodiments of the present technology include one or more features directed to improving the use and operability of an electroretinography device. For example, the device can include features for (i) improving the quality of light stimulus delivered to the eye or (ii) providing a better fit around the eye or a contact lens worn on the eye. These features can account for anatomical differences between different subjects by either masking or accommodating such differences.

The method for improving measurement accuracy of a measurement system includes: emitting, by a light-emitting unit, at least one light signal to penetrate a human tissue; receiving, by a photoelectric conversion unit, the at least one light signal emitted by the light-emitting unit after penetrating the human tissue, and converting the at least one light signal into an electrical signal; converting, by a analog-to-digital conversion unit, the electrical signal into a digital signal; optimizing, by a signal-to-noise ratio optimization module, a signal-to-noise ratio of the digital signal by establishing at least one of a plurality of logic strategies; adjusting, by the driving adjustment unit, an magnitude of a driving current of the light-emitting unit base on the adjustment coefficient; and performing, by an algorithm processing unit, a physiological parameter conversion and calculation based on the digital signal processed by the at least one logic strategy.

An example method for securing a wearable device to a user occurs while the wearable device is worn around a body part. The wearable device includes a biopotential-signal sensor connected to an amplifier to adjust amplification of biopotential signal. The method includes receiving first information representative of power needed to amplify the biopotential signal to the particular amplitude for signal processing. The method also includes, in accordance with a determination that the first information indicates that the wearable device is not properly affixed to the body part, providing first instructions to adjust how the wearable device is affixed to the body part. The method includes receiving second information, and, in accordance with a determination that the second information indicates that the wearable device is properly affixed to the body part, forgoing providing second instructions to adjust how the wearable device is affixed to the body part.