Abstract: A method and system for measuring oxygen levels and various blood constituents utilizing a sensor having one or more light sources, and one or more light detectors is disclosed. The system is capable of using data collected by the one or more detectors from a non-monochromatic light source to provide accurate information during motion events occurring with an extremity the sensor. The system is also capable of detecting and providing an alert if the sensor is not properly placed on a patient or becomes disengaged therefrom.

Abstract: A method and a device to determine a hydration condition is disclosed. The wearable device may have a top wall, a bottom wall, and a perimeter wall that form an inner cavity. The external surface of the bottom wall may have a projection and an inner surface of the bottom wall may have a channel. A circuit board may have a first portion in the channel, a second portion that extends through a first side wall of the channel to a first recess in the external surface of the bottom wall, and a third portion that extends through a second side wall of the channel to a second recess in the external surface of the bottom wall. A first impedance pad may be on the second portion in the first recess and a second impedance pad may be on the third portion in the second recess.

Abstract: A system configured to monitor autoregulation includes a medical sensor configured to be applied to a patient and to generate a regional oxygen saturation signal. The system includes a controller having a processor configured to receive the regional oxygen saturation signal and a blood pressure signal and to determine a cerebral oximetry index (COx) based on the blood pressure signal and the regional oxygen saturation signal. The processor is also configured to apply a data clustering algorithm to cluster COx data points over a range of blood pressures, identify a first cluster of COx data points that corresponds to an intact autoregulation zone for the patient, and provide a first output indicative of the intact autoregulation zone for the patient.

Abstract: An analyzing apparatus according to an embodiment of the present invention includes: a light source apparatus; an image sensor that generates color image data by capturing an image of biological tissue illuminated by light generated by the light source apparatus; an indicator calculation unit that calculates an indicator X that indicates a feature amount Q of the biological tissue, based on the color image data; and a feature amount acquisition unit that acquires the feature amount Q based on the indicator X. The feature amount acquisition unit includes a contribution calculation unit that calculates a contribution C based on at least two colors of single-color image data included in the color image data, the contribution C of scattering on a spectral characteristic of the biological tissue. Also, the feature amount acquisition unit acquires the feature amount Q based on the indicator X and the contribution C.

Abstract: A method for sensing a physiological feature is provided. A sensing apparatus is provided for sensing the physiological feature. The sensing apparatus includes a lighting unit, a light sensing unit, and a controller. The lighting unit and a light sensing unit are located on the same side of a portion under test of a testing subject. The lighting unit transmits a white light to the portion under test. The light sensing unit senses a reflected light. And the controller executes a measurement operation for the physiological feature based on a color wavelength of the reflected light.

Abstract: A method, system, or apparatus for determining a hydration condition of a user. The apparatus includes a housing. The apparatus further includes a light source disposed at an edge of the housing in a first position, wherein the light source, when affixed to a surface of a body, is operable to emit light into the body from the first position. The apparatus further includes an optical sensor disposed at the edge of the housing in a second position, the second position being a fixed distance from the first position to measure backscatter of the light reflected by a muscular-walled tube of the body at a depth below the surface of the body.